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National Stock Number:
5305-99-120-3869
Federal Supply Class:
5305
National Item Identification Number:
991203869
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:
| BS 1981 | K7766 | BRITISH STANDARDS INSTITUTION | | BS1981 | K7766 | BRITISH STANDARDS INSTITUTION | | SPE315-B4 | K0378 | ROLLS-ROYCE PLC | | SPE31548 | K0378 | ROLLS-ROYCE PLC | | BS1981-TABLE 12 | K7766 | BRITISH STANDARDS INSTITUTION | | BS1981@TABLE 12 | K7766 | BRITISH STANDARDS INSTITUTION |
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Techincal Specification:
| DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY 1981 SURFACE TREATMENT | | FASTENER LENGTH | 0.250 INCHES NOMINAL | | HEAD DIAMETER | 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM | | HEAD HEIGHT | 0.072 INCHES MINIMUM AND 0.082 INCHES MAXIMUM | | HEAD STYLE | PAN NO. 2 | | INTERNAL DRIVE STYLE | SLOT | | NOMINAL THREAD DIAMETER | 0.138 INCHES | | NONDEFINITIVE SPEC/STD DATA | 12 TABLE | | SCREW MATERIAL DOCUMENT AND CLASSIFICATION | K7766-BS1981 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE | | SCREW MATERIAL | STEEL | | SCREW SURFACE TREATMENT | PHOSPHATE | | SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | K0851-DEF-STAN 03-11 CLASS II DEF STAN/SPEC SINGLE TREATMENT RESPONSE | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.250 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNC |
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