National Item Identification Number
01-398-9473
013989473
5305-01-398-9473
5305013989473
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)
80204
80204
26512
Reference Numbers (Part Numbers)
ANSI B.18.3.1/4UNCX3/4.T2.S
ANSI B.18.3.1/4UNCX3/4.T2A.S
F525-11164-501
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNC
0.250 INCHES
20
2A
RIGHT-HAND
0.489 INCHES MINIMUM AND
0.589 INCHES MA