TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 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.  1, record 1, English, - National%20extrafine%20thread

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 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.  4, record 1, French, - filetage%20%C3%A0%20pas%20extra%2Dfin%20NEF

Record number: 1, Textual support number: 2 OBS

«UNEF» = Unified extra-fine thread («pas extra-fin»).  5, record 1, French, - filetage%20%C3%A0%20pas%20extra%2Dfin%20NEF

Record number: 1, Textual support number: 3 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).  3, record 1, French, - filetage%20%C3%A0%20pas%20extra%2Dfin%20NEF

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 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.  2, record 2, English, - Unified%20National%20Extra%2DFine%20screw%20thread

Record number: 2, Textual support number: 1 OBS

See also "8N", "8UN", "12N", "12UN", and "16N", "16UN", which concern the 8-, 12- and 16-thread series.  3, record 2, English, - Unified%20National%20Extra%2DFine%20screw%20thread

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 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.  1, record 2, French, - filetage%20UNEF

Record number: 2, Textual support number: 1 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).  3, record 2, French, - filetage%20UNEF

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 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.  1, record 3, English, - unified%20thread

Record number: 3, Textual support number: 2 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).  1, record 3, English, - unified%20thread

Record number: 3, Textual support number: 1 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.  1, record 3, English, - unified%20thread

Record number: 3, Textual support number: 2 OBS

See also "8UN", "12UN", and "16UN", which designate the 8-, 12-, and 16-thread series.  3, record 3, English, - unified%20thread

Record number: 3, Textual support number: 3 CONT

[Example of a thread identification by standardized symbols]:1/2-13UNC-2ALH.  1, record 3, English, - unified%20thread

Record number: 3, Textual support number: 3 OBS

unified thread: term standardized by ISO.  4, record 3, English, - unified%20thread

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 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.  1, record 3, French, - filetage%20unifi%C3%A9

Record number: 3, Textual support number: 2 CONT

Le filetage «Unified National» comprend les séries à filets gros et les séries à filets fins.  2, record 3, French, - filetage%20unifi%C3%A9

Record number: 3, Textual support number: 1 OBS

filetage en inches à profil UNJ : terme normalisé par l'ISO.  4, record 3, French, - filetage%20unifi%C3%A9

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 OBS

coarse pitch thread : Term standardized by ISO.  2, record 4, English, - coarse%20pitch%20thread

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 OBS

filetage à pas gros : Terme normalisé par l'ISO.  2, record 4, French, - filetage%20%C3%A0%20pas%20gros

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 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).  2, record 5, English, - diameter%2Dpitch%20series

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 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.  1, record 5, French, - s%C3%A9rie%20pas%2Ddiam%C3%A8tre

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 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.  3, record 6, English, - American%20National%20Coarse%20Thread

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 OBS

Série à filets gros : Pour pièces et équipement ordinaires dans l'industrie et le commerce.  4, record 6, French, - filetage%20NC%20%C3%A0%20gros%20pas

Record number: 6, Textual support number: 2 OBS

"UNC"="Unified coarse thread" (gros pas).  5, record 6, French, - filetage%20NC%20%C3%A0%20gros%20pas

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 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.  2, record 7, English, - Unified%20National%20Coarse%20screw%20thread

Record number: 7, Textual support number: 2 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.  2, record 7, English, - Unified%20National%20Coarse%20screw%20thread

Record number: 7, Textual support number: 3 CONT

[Example of a thread identification by standardized symbols]: 1/2-13UNC-2ALH.  2, record 7, English, - Unified%20National%20Coarse%20screw%20thread

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 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.  1, record 7, French, - filetage%20unifi%C3%A9%20%C3%A0%20gros%20pas%20UNC

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 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.  3, record 8, English, - National%20Fine%20screw%20thread

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 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.  3, record 8, French, - filetage%20%C3%A0%20pas%20fin%20NF

Record number: 8, Textual support number: 2 OBS

"UNF"="Unified fine thread" (pas fin).  4, record 8, French, - filetage%20%C3%A0%20pas%20fin%20NF

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 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.  3, record 9, English, - Unified%20National%20Fine%20screw%20thread

Record number: 9, Textual support number: 2 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.  2, record 9, English, - Unified%20National%20Fine%20screw%20thread

Record number: 9, Textual support number: 3 CONT

[Example of a thread identification by standardized symbols]: 1/2-13UNC-2ALH.  2, record 9, English, - Unified%20National%20Fine%20screw%20thread

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 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.  2, record 9, French, - filetage%20unifi%C3%A9%20%C3%A0%20pas%20fin%20UNF

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  English

Record number: 10, Textual support number: 1 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.  1, record 10, English, - 8%2Dthread%20series

Record number: 10, Textual support number: 1 OBS

"8N": for the American National thread. "8UN": for the Unified National thread.  2, record 10, English, - 8%2Dthread%20series

Record 10,  Textual support,  French

Record number: 10, Textual support number: 1 CONT

[...] un filetage Unified National à filets gros de 1 po de diamètre et de 8 filets au po, se cote : 1-8 UNC [...]  1, record 10, French, - s%C3%A9rie%20%C3%A0%208%20filets

Record number: 10, Textual support number: 2 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.  1, record 10, French, - s%C3%A9rie%20%C3%A0%208%20filets

Record number: 10, Textual support number: 1 OBS

Abréviation "8 N" pour le filetage American National et "8 UN" pour le filetage Unified National.  2, record 10, French, - s%C3%A9rie%20%C3%A0%208%20filets

Record 10,  Textual support,  Spanish