National Item Identification Number
01-255-3590
012553590
5305-01-255-3590
5305012553590
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)
56878
76301
82896
SAFETY SOCKET SCREW CORPORATION
DBA BLUE DEVIL SOCKET SCREW PRODUCTS
6479 N AVONDALE AVE
CHICAGO
IL
60631
800-762-5387
Reference Numbers (Part Numbers)
3M991-4-7
3M991-4-7
3M991-4-7
3M991-4-7
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNF
0.250 INCHES
28
3A
RIGHT-HAND
0.390 INCHES MINIMUM AND
0.460 INCHES MA