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UNF [9 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 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

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Record 2 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

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Record 3 1988-12-22

English

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

French

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

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 Etats-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).

Spanish

Save record 3

Record 4 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 4

Record 5 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 5

Record 6 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 6

Record 7 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 7

Record 8 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 8

Record 9 1985-08-14

English

Subject field(s)
  • Organizations, Administrative Units and Committees
OBS

FIST; connector steel cadmium plated ... male tube 9/16 in JIC 3/8 in MPT (42-32-256) joint industrial council (GAAB 76).

French

Domaine(s)
  • Organismes, unités administratives et comités
OBS

HYDR 78 210. Les filetages américains très utilisés sont le(...) UNF(Unified-fine thread=filetage fin normalisé) pour les raccordements SAE et JIC. Applications JIC raccords(HYDR 78, 213).

Key term(s)
  • Conseil industriel mixte
  • JIC

Spanish

Save record 9

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