NSN 5305-01-284-1389

Part Details | HEXAGON HEAD CAP SCREW

5305-01-284-1389 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: 25020UNC2A X 1 000 IN LG, 250-20UNC-2A X 1 000 IN LG, 1420UNC2AX1IN LG STL ZINC, 1/4-20UNC-2AX1IN LG STL ZINC, MILS1222, MIL-S-1222, MILDTL1222, MIL-DTL-1222, 5305-01-284-1389, 01-284-1389, 5305012841389, 012841389

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53AUG 18, 198801-284-138918257 ( SCREW, CAP, HEXAGON HEAD )
REFERENCE DRAWINGS & PICTURES

HEXAGON

Cross Reference | NSN 5305-01-284-1389
Part Number Cage Code Manufacturer
250-20UNC-2A X 1 000 IN LG80204AMERICAN NATIONAL STANDARDSINSTITUTE, INCORPORATED
1/4-20UNC-2AX1IN LG STL ZINC80204AMERICAN NATIONAL STANDARDSINSTITUTE, INCORPORATED
MIL-S-122281349MILITARY SPECIFICATIONSPROMULGATED BY MILITARY
MIL-DTL-122281349MILITARY SPECIFICATIONSPROMULGATED BY MILITARY
Technical Data | NSN 5305-01-284-1389
Characteristic Specifications
THREAD SERIES DESIGNATOR UNC
THREAD LENGTH0.870 INCHES MINIMUM AND 1.000 INCHES MAXIMUM
FASTENER LENGTH0.970 INCHES MINIMUM AND 1.000 INCHES MAXIMUM
HEAD STYLE HEXAGON
THREAD DIRECTION RIGHT-HAND
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH20
THREAD CLASS2A
MINIMUM TENSILE STRENGTH120000 POUNDS PER SQUARE INCH
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