NSN 5305-01-287-1586

Part Details | HEXAGON HEAD CAP SCREW

5305-01-287-1586 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. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes BOLT,MACHINE; BOLT,EXTERNALLY RELIEVED BODY; BOLT,INTERNAL WRENCHING; and SCREW,CAP,SOCKET HEAD.

Alternate Parts: 1420UNC2A112 LG GR 5, 1/4-20UNC-2A1-1/2 LG GR 5, MILS1222, MIL-S-1222, MILDTL1222, MIL-DTL-1222, 5305-01-287-1586, 01-287-1586, 5305012871586, 012871586

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53OCT 17, 198801-287-158618257 ( SCREW, CAP, HEXAGON HEAD )
REFERENCE DRAWINGS & PICTURES

HEXAGON

Cross Reference | NSN 5305-01-287-1586
Part Number Cage Code Manufacturer
1/4-20UNC-2A1-1/2 LG GR 580204AMERICAN NATIONAL STANDARDSINSTITUTE, INCORPORATED
MIL-S-122281348FEDERAL SPECIFICATIONSPROMULGATED BY GENERAL SERVICES
MIL-DTL-122281349MILITARY SPECIFICATIONSPROMULGATED BY MILITARY
Technical Data | NSN 5305-01-287-1586
Characteristic Specifications
THREAD SERIES DESIGNATOR UNC
THREAD LENGTH0.750 INCHES NOMINAL
FASTENER LENGTH1.460 INCHES MINIMUM AND 1.500 INCHES MAXIMUM
HEAD STYLE HEXAGON
THREAD DIRECTION RIGHT-HAND
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH20
THREAD CLASS2A
HEAD HEIGHT0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
FEATURES PROVIDED FINISHED HEAD
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 5 GRADE