National Item Identification Number

01-286-7990
012867990
5305-01-286-7990
5305012867990

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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80204

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Reference Numbers (Part Numbers)

MIL-S-1222
1/4-20UNC 3A X 3/8 IN. LG.

Required Categories

THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR

Required Description

UNC
0.250 INCHES
20
3A
RIGHT-HAND
0.245 INCHES MINIMUM
0.345 INCHES MINIMU