|
|
|
National Stock Number:
5305-01-608-7911
Federal Supply Class:
5305
National Item Identification Number:
016087911
Description:
SCREW,CAP,HEXAGON HEAD
Detail:
An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, MACHINE; BOLT, EXTERNALLY RELIEVED BODY; BOLT, INTERNAL WRENCHING; and SCREW, CAP, SOCKET HEAD.
|
Manufacturer Information:
| B1821BH031C525N | 80204 | AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED |
|
Techincal Specification:
| FASTENER LENGTH | 0.875 INCHES NOMINAL | | HEAD HEIGHT | 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | PER MSTM A354,GRADE BD NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL OVERALL | | NOMINAL THREAD DIAMETER | 0.3125 INCHES | | SPECIAL FEATURES | MATERIAL IS GRADE 8 STEEL. ZINC COATINGWITH SUPPLEMENTARY CHROMATE COATING WHICH MAY VARY FROM IRIDESCENT YELLOW OR BRONZE TO OLIVE DRAB. THE ASTM B 633 HYDROGEN EMBRITTLEMENT RELIEF REQUIREMENT SHALL APPLY TO ALL PRODUCTS WHERE MINIMUM HARDNESS IS 33 HRC OR HIGHER. | | SURFACE TREATMENT | ZINC AND CHROMATE OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD QUANTITY PER INCH | 18 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) | | THREAD LENGTH | 5.250 INCHES NOMINAL | | WIDTH BETWEEN FLATS | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
|
|