5306-99-547-6671, BOLT,MACHINE

National Stock Number:
5306-99-547-6671

Federal Supply Class:
5306

National Item Identification Number:
995476671

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:

BLT7075	K0378	ROLLS-ROYCE PLC
BLT7075	K7766	BRITISH STANDARDS INSTITUTION

Techincal Specification:

EXTENDED WASHER THICKNESS	1.52 MILLIMETERS NOMINAL
EXTENDED WASHER DIAMETER	10.88 MILLIMETERS MINIMUM AND 11.38 MILLIMETERS MAXIMUM
FASTENER LENGTH	30.20 MILLIMETERS NOMINAL AND 29.95 MILLIMETERS MINIMUM AND 30.45 MILLIMETERS MAXIMUM
FEATURES PROVIDED	FINISHED HEAD
HEAD HEIGHT	7.45 MILLIMETERS MINIMUM AND 7.95 MILLIMETERS MAXIMUM
HEAD STYLE	DOUBLE HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	MOD(PE),DTD 5638 MIL STD SINGLE MATERIAL RESPONSE
MATERIAL	NICKEL ALLOY
NOMINAL THREAD DIAMETER	0.250 INCHES
SPECIAL FEATURES	CONCENTRIC BLIND HOLE IN HD 3.80 MM DIA X 4.14 MM DEEP
WIDTH BETWEEN FLATS	7.69 MILLIMETERS MINIMUM AND 8.19 MILLIMETERS MAXIMUM
SURFACE FINISH	0.8 MICROMETERS THREADS
SURFACE FINISH	0.8 MICROMETERS BEARING SURFACE OF HEAD
SURFACE FINISH	0.8 MICROMETERS GRIP
SURFACE FINISH	3.2 MICROMETERS TOP OF HEAD
SURFACE FINISH	3.2 MICROMETERS SIDES OF HEAD
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	12.90 MILLIMETERS NOMINAL
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNJF

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