5305-01-591-0860 SCREW,CAP,SOCKET HEAD 5305-01-591-1388 SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-591-1277

Federal Supply Class:
5305

National Item Identification Number:
015911277

Description:
SCREW,CAP,SOCKET HEAD

Detail:
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.


Manufacturer Information:
NAS1351-14-7280205NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE


Techincal Specification:
FASTENER LENGTH4.500 INCHES NOMINAL
HEAD DIAMETER1.293 INCHES MINIMUM AND 1.312 INCHES MAXIMUM
HEAD HEIGHT0.864 INCHES MINIMUM AND 0.875 INCHES MAXIMUM
HEAD STYLEFLAT CHAMFER
INTERNAL DRIVE STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONFF-S-86 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
NOMINAL THREAD DIAMETER0.875 INCHES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH2.250 INCHES MINIMUM
THREAD QUANTITY PER INCH14
THREAD SERIES DESIGNATORUNRF
WIDTH ACROSS FLATS0.094 INCHES NOMINAL


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