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UNC [10 records]

Record 1 2011-08-24

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
DEF

Subdivision of the cloud genera taking into account one or more of the following features: (1) Forms (clouds in banks, veils, sheets, layers, etc.); (2) Dimensions (areas of their constituent elements, vertical extension, etc.); (3) Internal structure (ice crystals, water droplets, etc.); (4) Formation as a result of known or assumed physical processes (orographic lift, etc.).

OBS

The species are mutually exclusive.

OBS

Species of clouds: calvus (cal); capillatus (cap); castellanus (cas); congestus (con); fibratus (fib); floccus (flo); fractus (fra); humilis (hum); lenticularis (len); mediocris (med); nebulosus (neb); spissatus (spi); stratiformis (str); uncinus (unc).

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
DEF

Subdivision des genres de nuages déterminée selon au moins une des caractéristiques suivantes : 1) forme (nuages en bancs, en voile, en nappe, en couche, etc.); 2) dimensions (surface des éléments constitutifs, extension verticale, etc.); 3) structure interne (cristaux de glace, gouttelettes d’eau, etc.); 4) processus physiques, connus ou présumés, qui peuvent intervenir dans leur formation (soulèvement orographique, etc.).

OBS

Les espèces s’excluent mutuellement.

OBS

Les diverses espèces de nuages sont : fibratus(fib), lenticularis(len), uncinus(unc), fractus(fra), spissatus(spi), humilis(hum), castellanus(cas), mediocris(med), floccus(flo), congestus(con), stratiformis(str), calvus(cal), nebulosus(neb), capillatus(cap).

Spanish

Campo(s) temático(s)
  • Fenómenos meteorológicos, climáticos y atmosféricos
DEF

Subdivisión de los géneros de nubes teniendo en cuenta una o más de las siguientes características: 1) Forma (nubes en bancos, velos, sábanas, capas, etc.). 2) Dimensiones (extensión de los elementos constitutivos, extensión vertical, etc.). 3) Estructura interna (cristales de hielo, gotas de agua, etc.). 4) Procesos físicos, conocidos o hipotéticos, que pueden intervenir en la formación de la nube (nube orográfica, etc.).

OBS

Las especies son mutuamente excluyentes.

OBS

Especies de nubes: calvus (cal), capillatus (cap), castellanus (cas), congestus (con), fibratus (fib), floccus (flo), fractus (fra), humilis (hum), lenticularis (len), mediocris (med), nebulosus (neb), spissatus (spi), stratiformis (str), uncinus (unc).

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 2000-04-04

English

Subject field(s)
  • Aeroindustry
CONT

UNC Helicopter and General Electric, for their part, have recently made a public demonstration of their beefed-up Huey which they call the Ultra Huey.

French

Domaine(s)
  • Constructions aéronautiques
CONT

UNC Helicopter et General Electric viennent pour leur part de présenter en public leur propre Huey modernisé et équipé d’une nouvelle turbine(T700) sous le nom d’Ultra Huey.

Spanish

Save record 3

Record 4 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 4

Record 5 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 5

Record 6 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 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 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 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 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 9

Record 10 1976-06-19

English

Subject field(s)
  • Corporate Economics

French

Domaine(s)
  • Économie de l'entreprise
OBS

poli unc p. 190

Spanish

Save record 10

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