National Item Identification Number
01-277-0420
012770420
5305-01-277-0420
5305012770420
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)
05047
AMERICAN SOCIETY OF MECHANICAL
ENGINEERS THE INC
3 PARK AVE FL 21
NEW YORK
NY
10016
800-843-2763
Reference Numbers (Part Numbers)
B1821BH100F250N
FF-S-85
MS90727-232
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNF
1.000 INCHES
12
2A
RIGHT-HAND
2.246 INCHES MINIMUM AND
2.500 INCHES MA
