5306-99-770-3332, BOLT,MACHINE

National Stock Number:
5306-99-770-3332

Federal Supply Class:
5306

National Item Identification Number:
997703332

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:

BLT7111

K0378

ROLLS-ROYCE PLC

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	1.50 MILLIMETERS MINIMUM AND 2.30 MILLIMETERS MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	9.40 MILLIMETERS MINIMUM AND 10.40 MILLIMETERS MAXIMUM
CRITICALITY CODE JUSTIFICATION	AAWC
FASTENER LENGTH	38.60 MILLIMETERS MINIMUM AND 38.75 MILLIMETERS MAXIMUM
FIRST DIAMETER FROM HEAD	7.850 MILLIMETERS MINIMUM AND 7.925 MILLIMETERS MAXIMUM
HEAD DIAMETER	12.45 MILLIMETERS MINIMUM AND 12.95 MILLIMETERS MAXIMUM
HEAD HEIGHT	3.85 MILLIMETERS MINIMUM AND 4.35 MILLIMETERS MAXIMUM
HEAD STYLE	FLAT CHAMFER
MATERIAL DOCUMENT AND CLASSIFICATION	DTD5638 MIL STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL OVERALL
NOMINAL THREAD DIAMETER	0.312 INCHES
SECOND DIAMETER FROM HEAD	6.17 MILLIMETERS MINIMUM AND 6.30 MILLIMETERS MAXIMUM
SPECIAL FEATURES	SQ WRENCHING FEATURE W/SLOT
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	19.30 MILLIMETERS NOMINAL
THREAD QUANTITY PER INCH	24
THREAD SERIES DESIGNATOR	UNF

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