National Item Identification Number

01-503-7571
015037571
5305-01-503-7571
5305015037571

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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57472

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Reference Numbers (Part Numbers)

NAS1351C7-44
NAS1351C7-44

Required Categories

THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR

Required Description

UNRF
0.438 INCHES
20
3A
RIGHT-HAND
1.375 INCHES NOMINAL
2.750 INCHES NOMIN