BOLT,CLOSE TOLERANCE

5306FSC

01NCB code

551-5928Item number

NIIN 01-551-5928

Identification

THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	INCHES MINIMUM 0.532
FASTENER LENGTH	INCHES NOMINAL 4.594
HEAD STYLE
HEAD HEIGHT	INCHES MINIMUM 0.172 AND INCHES MAXIMUM 0.204
WIDTH BETWEEN FLATS	INCHES MINIMUM 0.490 AND INCHES MAXIMUM 0.502
GRIP DIAMETER	INCHES MINIMUM 0.3112 AND INCHES MAXIMUM 0.3117
SHANK UNTHREADED HOLE DIAMETER	FIRST HOLE INCHES NOMINAL 0.076
NOMINAL THREAD DIAMETER	INCHES 0.312
GRIP LENGTH	INCHES NOMINAL 4.062
THREAD QUANTITY PER INCH	24
MINIMUM TENSILE STRENGTH	POUNDS PER SQUARE INCH 125000
HARDNESS RATING	OVERALL ROCKWELL C MINIMUM 26.0 AND ROCKWELL C MAXIMUM 32.0
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	FIRST HOLE INCHES NOMINAL 3.921
SURFACE FINISH	BEARING SURFACE OF HEAD MICROINCHES 63.0
SURFACE FINISH	GRIP MICROINCHES 63.0
MATERIAL	OVERALL STEEL COMP 8740 OR STEEL COMP 8630
MATERIAL DOCUMENT AND CLASSIFICATION	OVERALL MIL SPEC 1ST MATERIAL RESPONSE -IL-S-6049 OR MIL SPEC 2ND MATERIAL RESPONSE -IL-S-6050
SURFACE TREATMENT	OVERALL CADMIUM AND CHROMATE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	OVERALL FED SPEC ALL TREATMENT RESPONSES QQ--416,TY2,CL3
THREAD SERIES DESIGNATOR	UNF

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