National Item Identification Number
00-227-1557
002271557
5305-00-227-1557
5305002271557
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)
53711
D9182
43689
Reference Numbers (Part Numbers)
150-6404868-40
211063027
211063027
2995526-2
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNC
0.250 INCHES
20
3A
RIGHT-HAND
0.509 INCHES MINIMUM AND
0.641 INCHES MA