National Item Identification Number
01-251-1973
012511973
5305-01-251-1973
5305012511973
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)
Reference Numbers (Part Numbers)
FF-S-86TY8 1/4-28THD0.625L
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNF
0.250 INCHES
28
3A
RIGHT-HAND
0.524 INCHES MINIMUM AND
0.625 INCHES MA