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National Stock Number:
5305-99-888-8860
Federal Supply Class:
5305
National Item Identification Number:
998888860
Description:
SCREW,MACHINE
Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD.
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Manufacturer Information:
| 870-50044-11 | K7705 | KNDS DEFENCE UK LIMITED | | BS57 | K7766 | BRITISH STANDARDS INSTITUTION | | BS57-TABLE 2 4BA X 7/16 | K7766 | BRITISH STANDARDS INSTITUTION |
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Techincal Specification:
| EXTERNAL THREAD TOLERANCE CLASS | NORMAL | | FASTENER LENGTH | 0.438 INCHES NOMINAL | | HEAD DIAMETER | 0.242 INCHES MINIMUM AND 0.252 INCHES MAXIMUM | | HEAD HEIGHT | 0.095 INCHES MINIMUM AND 0.101 INCHES MAXIMUM | | HEAD STYLE | ROUND | | INTERNAL DRIVE STYLE | SLOT | | NOMINAL THREAD DIAMETER | 0.142 INCHES | | SCREW MATERIAL DOCUMENT AND CLASSIFICATION | K7766-BS57 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE | | SCREW MATERIAL | STEEL | | SCREW SURFACE TREATMENT | ZINC | | SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | K0851-DEF STAN 130 DEF STAN/SPEC SINGLE TREATMENT RESPONSE | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.399 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | BA | | THREAD PITCH IN MILLIMETERS | 0.66 |
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