National Item Identification Number
01-256-4457
012564457
5305-01-256-4457
5305012564457
National Stock Number
Item Name
SCREW,CAP,HEXAGON HEAD
Federal Supply Class
5305
Description
An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, MACHINE; BOLT, EXTERNALLY RELIEVED BODY; BOLT, INTERNAL WRENCHING; and SCREW, CAP, SOCKET HEAD.
Commercial and Government Entity Code (Supplier Data)
03111
BLISS E W CO
GULF AND WESTERN MFG CO
530 S ELLSWORTH AVE
SALEM
OH
44460
21439
Reference Numbers (Part Numbers)
52-B-1070-1
52-B-1070-1
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNF
0.500 INCHES
20
3A
RIGHT-HAND
0.484 INCHES MINIMUM AND
0.563 INCHES MA