National Item Identification Number

01-054-3402
010543402
5305-01-054-3402
5305010543402

National Stock Number

Item Name

SCREW,CAP,SOCKET HEAD

Federal Supply Class

5305

Description

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.

Commercial and Government Entity Code (Supplier Data)

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D9182

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30003

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Reference Numbers (Part Numbers)

639AS1559
639AS1559ALT

Required Categories

THREAD CLASS
THREAD LENGTH
FASTENER LENGTH
WIDTH ACROSS FLATS
THE MANUFACTUR

Required Description

3A
0.437 INCHES NOMINAL
0.496 INCHES MINIMUM AND
0.498 INCHES MAXIMUM
0.109