5305-01-189-8437 SCREW,CAP,SOCKET HEAD Index 5305-01-189-8439 SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-01-189-8438

Federal Supply Class:
5305

National Item Identification Number:
011898438

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:
FF-S-8681348FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC
MS16995-55B80205NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
MS16995-55B96906MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
FASTENER LENGTH1.610 INCHES MINIMUM AND 1.750 INCHES MAXIMUM
HARDNESS RATING80.0 ROCKWELL C MINIMUM OVERALL
HEAD DIAMETER0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM
HEAD HEIGHT0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
HEAD STYLEFLAT CHAMFER
INTERNAL DRIVE STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH
MINIMUM YIELD STRENGTH30000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.250 INCHES
NONDEFINITIVE SPEC/STD DATA6 TYPE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTOXIDE OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1.710 INCHES MINIMUM AND 1.750 INCHES MAXIMUM
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
WIDTH ACROSS FLATS0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM


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