National Item Identification Number
01-456-0556
014560556
5305-01-456-0556
5305014560556
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)
D9182
53711
70318
82926
PENN SCREW AND MACHINE WORKS
3075 ADVANCE LN
COLMAR
PA
18915
215-822-2525
Reference Numbers (Part Numbers)
FFS86TY1 .25-20UNC3AX.50L-NICU
FFS86TY1,.25-20 UNC-3AX.50L,NIC
6817703 ITEM 3;
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNC
0.250 INCHES
20
3A
RIGHT-HAND
0.400 INCHES MAXIMUM
0.497 INCHES MINIMU
