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National Stock Number:
5305-01-331-0030
Federal Supply Class:
5305
National Item Identification Number:
013310030
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:
| 4-40X1/4 | 01536 | TEXTRON INC CAMCAR DIV SEMS PRODUCTS UNIT | | CRESTCUP4-40X1/4 | 93907 | TEXTRON FASTENING SYSTEMS DBA DECORAH OPERATIONS TFS | | H21-0001-004 | 14304 | L3HARRIS TECHNOLOGIES, INC. | | H21-001-004 | 14304 | L3HARRIS TECHNOLOGIES, INC. |
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Techincal Specification:
| FASTENER LENGTH | 0.250 INCHES NOMINAL | | HEAD HEIGHT | 0.060 INCHES MINIMUM AND 0.078 INCHES MAXIMUM | | HEAD DIAMETER | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM | | HEAD STYLE | PAN | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | NOMINAL THREAD DIAMETER | 0.112 INCHES | | SCREW MATERIAL | STEEL CORROSION RESISTING | | SPECIAL FEATURES | CREST CUP SPRING WASHER | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.200 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 40 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
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