TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

PITCH DIAMETER THREAD [20 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2005-10-26

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series : coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch-diameter thread in the UNC series has 20 threads/in., while in the UNF it has 28... The extrafine thread series(UNEF and NEF) is used principally in aeronautical structures where an extremely shallow thread is needed for thin-walled material and where a maximum practicable number of threads is required for a given length.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
OBS

Série à filets surfins. Largement utilisée dans l'assemblage d'équipement et d'instruments en aéronautique pour le taraudage de pièces minces, de tubes, de viroles, de brides et de plateaux d'accouplement, de douilles, etc, et lorsqu'il importe d'avoir un nombre maximal de filets sur une longueur requise.

OBS

«UNEF» = Unified extra-fine thread («pas extra-fin»).

OBS

extrafin : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2004).

Spanish

Save record 1

Record 2 2005-10-26

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series : coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch.-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28.... The extrafine thread series(UNEF and NEF) is used principally in aeronautical structures where an extremely shallow thread is needed for thin-walled material and where a maximum practicable number of threads is required for a given length.

OBS

See also "8N", "8UN", "12N", "12UN", and "16N", "16UN", which concern the 8-, 12- and 16-thread series.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

Norme BS 1580 : 1953 «Unified Screw Threads». Il s'agit des filetages cylindriques de mécanique générale, au profil ISO, mais avec les cotes en pouces. Depuis 1949, le Royaume-Uni, le Canada et les États-Unis se sont mis d'accord sur ces filetages et leur désignation : «UNC» pour «Unified coarse thread» (gros pas); «UNF» pour «Unified fine thread» (pas fin) : «UNEF» pour «Unified extra-fine» (pas extra fin); «UN» pour «Unified constant pitch» (pas constant). Ces filetages figurent [...] d'une manière plus complète dans la norme américaine ASA B1.1-1960 qui concerne les filetages unifiés.

OBS

extrafin : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2004).

Spanish

Save record 2

Record 3 2003-07-16

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Joining Elements (Mechanical Components)
  • Special-Language Phraseology
CONT

Detailed parts inspection and measurement, including, but not limited to, the application of aerospace Non-destructive Testing and Inspection (NDT/I) and dimensional checks such as precise thread measurement; ...

CONT

Thread Measurement. The most important factors when threaded parts must meet engineering specifications are accuracy and consistency. Our line of thread diameter gages inspects the effects of all thread element variations and pitch diameter of the threads.

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Éléments d'assemblage (Composants mécaniques)
  • Phraséologie des langues de spécialité
CONT

La machine SIP est capable de réaliser des mesures externes (Tampon lisse, jauge conique, etc), des mesures internes (bague lisse, calibre à mâchoire, etc), des mesures de filetage (diamètre extérieur, intérieur, sur flanc, le pas et l'angle). La capacité de mesure de l'instrument est de 0 à 1000 mm. L'incertitude de mesure est de ±0,5 µm.

Spanish

Save record 3

Record 4 1999-10-13

English

Subject field(s)
  • Tools and Equipment (Mechanics)
  • Machine-Tooling (Metallurgy)
DEF

A micrometer used to measure pitch diameter of a screw thread.

French

Domaine(s)
  • Outillage (Mécanique)
  • Usinage (Métallurgie)

Spanish

Save record 4

Record 5 1999-05-10

English

Subject field(s)
  • Fire-Fighting and Rescue Equipment
  • Pipes and Fittings
DEF

A fitting for connecting hoses of different pitch or couplings of different diameters.

DEF

A fitting for connecting hose couplings of different size or thread pitch. If the coupling being attached is smaller in diameter, the adapter is called a reducer; if larger, it is called an increaser.

DEF

Fitting used for connecting lengths of hose which have dissimilar couplings.

OBS

Hose adapter: term and definition (e) standardized by ISO.

Key term(s)
  • adaptor

French

Domaine(s)
  • Matériel de secours et de lutte (incendies)
  • Tuyauterie et raccords
DEF

Pièce se composant de deux demi-raccords d'un modèle différent montés sur un même corps et servant à réunir deux tuyaux ou un tuyau et une pièce de jonction qui n'ont pas le même système de raccord.

DEF

Raccord utilisé pour relier deux longueurs de tuyaux qui n'ont pas les mêmes raccords.

DEF

Pièce se composant de deux demi-raccords montés sur un même corps et servant à réunir deux raccords dont les filets sont différents.

OBS

Raccord intermédiaire : terme et définition (e) normalisés par l'ISO.

Spanish

Campo(s) temático(s)
  • Equipo de salvamento y lucha contra incendios
  • Tuberías y accesorios
Save record 5

Record 6 1998-06-09

English

Subject field(s)
  • Joining Elements (Mechanical Components)
  • Aeronautical Engineering and Maintenance
CONT

The unified thread form accompanied by the unified thread standards has in the past fulfilled the necessary requirements for interchangeability of threaded products between the United States, Great Britain, and Canada. This modified thread form represented two compromises between British Whitworth and United Stated National thread forms. The British accepted the 60° thread angle of the American thread, and the Americans accepted a rounded root and crest similar to the Whitworth form. The United States National unified form for external threads has a rounded root and may have either a rounded or flat crest. The unified thread contours provide advantages over both the earlier forms .... The unified thread is a general-purpose thread that is particularly suited for fasteners.

CONT

Unified and American National screw thread standards... consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series; coarse(UNC), fine(UNF), and extrafine(UNEF).

OBS

Under the unified system, threads are specified by giving in order the nominal diameter, number of threads per inch, the initial letters such as UNC or UNF that identify the series, and class of thread (IA, 2A, and 3A or 1B, 2B and 3B). ... the specification for a left-hand thread must have the letters LH included.

OBS

See also "8UN", "12UN", and "16UN", which designate the 8-, 12-, and 16-thread series.

CONT

[Example of a thread identification by standardized symbols]:1/2-13UNC-2ALH.

OBS

unified thread: term standardized by ISO.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
  • Aérotechnique et maintenance
CONT

Depuis 1949, le Royaume-Uni, le Canada et les Etats-Unis se sont mis d'accord sur ces filetages et leur désignation : «UNC» pour "Unified coarse thread [...] «UNF» pour «Unified fine thread» [...] «UNEF» pour «Unified extra-fine» [...] «UN» pour «Unified constant pitch» [...] Ces filetages figurent [...] dans la norme américaine ASA B1.1-1960 qui concerne les filetages unifiés.

CONT

Le filetage «Unified National» comprend les séries à filets gros et les séries à filets fins.

OBS

filetage en inches à profil UNJ : terme normalisé par l'ISO.

Spanish

Save record 6

Record 7 1994-05-30

English

Subject field(s)
  • Joining Elements (Mechanical Components)
  • Aeronautical Engineering and Maintenance
OBS

pitch diameter of internal thread : Term standardized by ISO.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
  • Aérotechnique et maintenance
OBS

diamètre sur flancs du filetage intérieur : Terme normalisé par l'ISO.

Spanish

Save record 7

Record 8 1994-05-30

English

Subject field(s)
  • Joining Elements (Mechanical Components)
  • Aeronautical Engineering and Maintenance
OBS

pitch diameter of internal thread : Term standardized by ISO.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
  • Aérotechnique et maintenance
OBS

diamètre sur flancs du filetage extérieur : Terme normalisé par l'ISO.

Spanish

Save record 8

Record 9 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads [UNC or NC; UNF or NF; UNEF or NEF; 8UN or 8N; 12UN or 12N; 16UN or 16N] and a selection of special threads that cover nonstandard combinations of diameter and pitch.... The 16-thread series(16UN or 16N) is a uniform pitch series for applications that require a very fine thread, as in threaded adjusting collars and bearing retaining nuts. This series is used as a continuation of the extrafine thread series for diameters greater than 2 in.

OBS

"16N": for the American National thread."16UN": for the Unified National thread.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

L'utilisation type des diverses séries est la suivante : [...]. Série à 16 filets. Pour le filetage des colliers d'ajustement et des écrous de retenue des roulements et pour un usage général comme le prolongement des filets surfins.

OBS

"16 N" : pour le filetage American National; "16 UN" : pour le filetage Unified National.

OBS

Exemple de cotation pour un filetage fin de 1 po de diamètre et de 16 filets au po : 1-16 UNF.

Spanish

Save record 9

Record 10 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
  • Machine-Tooling (Metallurgy)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general the unified screw threads are limited to three series : coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28... The fine thread series(UNF and NF) is recommended for general use in the automotive and air craft fields for threads subject to strong vibration. In general, a fine thread should be used only where close adjustment, extra strength, or increased resistance to loosening is a factor.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
  • Usinage (Métallurgie)
OBS

Série à filets fins. Pour pièces et équipement où l'emploi des filets fins est plus avantageux. Ce filetage offre une plus grande résistance à la traction et à la torsion, tout en étant moins sujet au déboulonnage sous l'effet des vibrations.

OBS

"UNF"="Unified fine thread" (pas fin).

Spanish

Save record 10

Record 11 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads [UNC or NC; UNF or NF; UNEF or NEF; 8UN or 8N; 12UN or 12N; 16UN or 16N] and a selection of special threads that cover nonstandard combinations of diameter and pitch... The 8-thread series(8N) with 8 threads/in. for all diameters is used on bolts for high-pressure flanges, cylinder-head studs, and other fasteners against pressure, where it is required that an initial tension be set up so that the joint will not open when steam or other pressure is applied. This series has come into general use for many types of engineering work. It is sometimes used as a substitute for the coarse thread series for diameters greater then 1 in.

OBS

"8N": for the American National thread. "8UN": for the Unified National thread.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

[...] un filetage Unified National à filets gros de 1 po de diamètre et de 8 filets au po, se cote : 1-8 UNC [...]

CONT

L'utilisation type des diverses séries est la suivante : [...]. Série à 8 filets. Boulons de serrage pour brides de canalisations sous pression élevée. Goujons pour culasses de moteurs [...]. Cette série remplace la série à filets gros sur les pièces de visserie de plus grandes dimensions.

OBS

Abréviation "8 N" pour le filetage American National et "8 UN" pour le filetage Unified National.

Spanish

Save record 11

Record 12 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
OBS

ISO metric thread series are selections of diameter-pitch combinations that are distinguished from each other by the different pitch applied to a specific diameter(MI0 X 1. 5 coarse series or MI0 X 1. 25 fine series).

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

Filetages profil ISO (filetages métriques à filet triangulaire, remplaçant le profil SI) suivant normes NF E03-001 ET 013 [...]. La norme NF E03-03 constitue une vue d'ensemble des filetages métriques à filet triangulaire [...] conformes aux recommandations de l'ISO. Il appartient à chaque branche d'industrie de choisir, par sélection, dans les filetages de cette norme, les séries pas-diamètres qui lui sont nécessaires.

Spanish

Save record 12

Record 13 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads [UNC or NC; UNF or NF; UNEF or NEF; 8UN or 8N; 12UN or 12N; 16UN or 16N] and a selection of special threads that cover nonstandard combinations of diameter and pitch... The 12-thread series(12UN or 12N) is a uniform pitch series that is widely used is industry for thin nuts on shafts and sleeves. This series is considered to be a continuation of the fine-thread series for diameters greater than 1 1/2 in.

OBS

"12N": for the American National thread. "12UN": for the Unified National thread.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

[...] un filetage Unified National à filets fins de 1 po de diamètre et de 12 filets au po, se cote : 1-12 UNF.

CONT

L'utilisation type des diverses séries est la suivante : [...]. Série à 12 filets. Utilisée couramment en chaudronnerie, dans les diamètres jusqu'à 1 3/4 po, pour refaire les filets taraudés usés et pour un usage général comme le prolongement des filets fins.

OBS

"12 N" : pour le filetage American National; "12 UN" : pour le filetage Unified National.

Spanish

Save record 13

Record 14 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series : coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28. In the Unified and American National standards, the coarse thread series(UNC and NC) is recommended for general industrial use on threaded machine parts and for screws and bolts. Because a coarse thread has fewer threads per inch than a fine thread of the same diameter, the helix angle is greater, and the thread travels farther in one turn. A coarse thread is preferred when rapidity and ease of assembly are desired, and where strength and clamping power are not of prime importance.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
OBS

Série à filets gros : Pour pièces et équipement ordinaires dans l'industrie et le commerce.

OBS

"UNC"="Unified coarse thread" (gros pas).

Spanish

Save record 14

Record 15 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series : coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch.-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28. In the unified and American National standards, the coarse thread series(UNC and NC) is recommended for general industrial use on threaded machine parts and for screws and bolts. Because a coarse thread has fewer threads per inch than a fine thread of the same diameter, the helix angle is greater, and the thread travels farther in one turn. A coarse thread is preferred when rapidity and ease of assembly are desired, and where strength and clamping power are not of prime importance.

CONT

Threads are designated by standardized notes. Under the unified system, threads are specified by giving in order the nominal diameter, number of threads per inch, the initial letters such as UNC or UNF that identify the series, and class of thread (1A, 2A, and 3A or 1B, 2B and 3B). Threads are considered to be right-hand and single unless otherwise noted; therefore the specification for a left-hand thread must have the letters LH included.

CONT

[Example of a thread identification by standardized symbols]: 1/2-13UNC-2ALH.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

Norme BS 1580 : 1953 "Unified Screw Threads". Il s'agit des filetages cylindriques de mécanique générale, au profil ISO, mais avec les cotes en pouces. Depuis 1949, le Royaume-Uni, le Canada et les États-Unis se sont mis d'accord sur ces filetages et leur désignation : "UNC" pour "Unified coarse thread" (gros pas)"; "UNF" pour "Unified fine thread"(pas fin); "UNEF" pour "Unified extra-fine thread" (pas extra-fin); "UN" pour "Unified constant pitch" (pas constant). Ces filetages figurent [...] d'une manière plus complète dans la norme américaine ASA B1.1-1960 qui concerne les filetages unifiés.

Spanish

Save record 15

Record 16 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch.

OBS

Abbreviation "N": used in the six series: "NC thread" (National Coarse); "NF thread" (National Fine); "NEF" (National Extra-Fine); "8N", "12N" and "16N", which concern the 8-, 12-, and 16- thread series.

OBS

Compare "Unified National thread".

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
OBS

Le filet "Unified National" est le plus fréquemment utilisé en Amérique du Nord. Le terme "Unified" fut défini à la suite d'un consensus entre les comités de normalisation du Royaume-Uni, des Etats-Unis et du Canada qui, en 1948, mirent au point des normes communes aux filets. Antérieurement, le fond et le sommet des filets "American National" étaient plats (...)

Spanish

Save record 16

Record 17 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series : coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch.-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28.... The fine thread series(UNF and NF) is recommended for general use in the automotive and air craft fields for threads subject to strong vibration. In general, a fine thread should be used only where close adjustment, extra strength, or increased resistance to loosening is a factor.

CONT

Threads are designated by standardized notes. Under the unified system, threads are specified by giving in order the nominal diameter, number of threads per inch, the initial letters such as UNC or UNF that identify the series, and class of thread (1A, 2A, and 3A or 1B, 2B, and 3B). Threads are considered to be right-hand and single unless otherwise noted; therefore the specification for a left-hand thread must have the letters LH included.

CONT

[Example of a thread identification by standardized symbols]: 1/2-13UNC-2ALH.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

Norme BS 1580 : 1953 "Unified Screw Threads". Il s'agit des filetages cylindriques de mécanique générale, au profil ISO, mais avec les cotes en pouces. Depuis 1949, le Royaume-Uni, le Canada et les États-Unis se sont mis d'accord sur ces filetages et leur désignation : "UNC" pour "Unified coarse thread" (gros pas). "UNF" pour "Unified fine thread" (pas fin). "UNEF" pour "Unified extra-fine thread" (pas extra-fin). "UN" pour "Unified constant pitch" (pas constant). Ces filetages figurent [...] d'une manière plus complète dans la norme américaine ASA B1.1-1960 qui concerne les filetages unifiés.

Spanish

Save record 17

Record 18 1988-03-28

English

Subject field(s)
  • Machine-Tooling (Metallurgy)
CONT

Threads may also be checked by the screw-thread-comparator micrometer which has two conical measuring surfaces. Since it does not measure the pitch diameter, it is important to set this instrument to a thread plug gauge before measuring a threaded workpiece.

French

Domaine(s)
  • Usinage (Métallurgie)

Spanish

Save record 18

Record 19 1988-03-28

English

Subject field(s)
  • Lathe Work (Machine-Tooling)
CONT

The three-wire method of measuring threads is... recognized as one of the best methods of checking the pitch diameter because the results are least affected by an error which may be present in the included thread angle.... Three wires, of equal diameter, are placed in thread; two on one side and one on the other side.... A standard micrometer may then be used to measure the distance over the wires.

French

Domaine(s)
  • Tournage sur métaux
CONT

Indépendamment des tampons et bagues filetées, d'un usage courant, pour le contrôle des filetages, la vérification du diamètre à flancs de filet est également faite au moyen d'un micromètre à filet de vis ou par la méthode des piges (tampons tangents cylindriques).

Spanish

Save record 19

Record 20 1981-06-19

English

Subject field(s)
  • Industrial Tools and Equipment

French

Domaine(s)
  • Outillage industriel

Spanish

Save record 20

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