National Item Identification Number
01-278-1991
012781991
5305-01-278-1991
5305012781991
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)
29372
81755
Reference Numbers (Part Numbers)
CA21241C-10-3-11
C9747-3-3-11
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNF
0.190 INCHES
32
3A
RIGHT-HAND
0.432 INCHES MINIMUM AND
0.494 INCHES MA