5306-01-266-8301, BOLT,MACHINE

National Stock Number:
5306-01-266-8301

Federal Supply Class:
5306

National Item Identification Number:
012668301

Description:
BOLT,MACHINE

Detail:
An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, BOLT, SHEAR. See also SCREW, CAP, HEXAGON HEAD and SCREW, MACHINE.

Manufacturer Information:

BR2111-6281	17023	BRUCE AEROSPACE INC
ST26D58-6281	04236	LOCKHEED MARTIN CORP

Techincal Specification:

FASTENER LENGTH	2.577 INCHES MINIMUM AND 2.607 INCHES MAXIMUM
FEATURES PROVIDED	FINISHED HEAD
GRIP LENGTH	1.735 INCHES MINIMUM AND 1.765 INCHES MAXIMUM
HEAD HEIGHT	0.265 INCHES MINIMUM AND 0.297 INCHES MAXIMUM
HEAD STYLE	HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	IRON ALLOY 660 OVERALL
NOMINAL THREAD DIAMETER	0.500 INCHES
SPECIAL FEATURES	FURNISHED WITH TAB,WASHER,SPACER; TAB AND WASHER CRES PER MIL-S-6069 COMP 301 COND A; SPACER TYPE 303SE COND A; ALL PARTS PASSIVATED PER QQ-P-35
WIDTH BETWEEN FLATS	0.741 INCHES MINIMUM AND 0.751 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.812 INCHES MINIMUM AND 0.872 INCHES MAXIMUM
THREAD QUANTITY PER INCH	20
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)

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