5306-99-781-0381, BOLT,MACHINE

National Stock Number:
5306-99-781-0381

Federal Supply Class:
5306

National Item Identification Number:
997810381

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:

B497797	K0378	ROLLS-ROYCE PLC
B497797 ZZ	K0378	ROLLS-ROYCE PLC

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.860 INCHES MINIMUM AND 0.880 INCHES MAXIMUM
CRITICALITY CODE JUSTIFICATION	AAWB
FASTENER LENGTH	0.970 INCHES MINIMUM AND 0.990 INCHES MAXIMUM
FEATURES PROVIDED	FINISHED HEAD
GRIP LENGTH	0.640 INCHES MAXIMUM
HEAD HEIGHT	0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM
HEAD STYLE	HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	BSI BS HR650 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE
MATERIAL	STEEL
NOMINAL THREAD DIAMETER	0.250 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.0669 INCHES MINIMUM AND 0.0739 INCHES MAXIMUM
SPECIAL FEATURES	MAJOR DIA OF THD 0.2435 IN. MIN & 0.2480 IN. MAX
WIDTH BETWEEN FLATS	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
SURFACE FINISH	125.0 MICROINCHES SIDES OF HEAD
SURFACE FINISH	125.0 MICROINCHES TOP OF HEAD
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE FINISH	32.0 MICROINCHES THREADS
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.340 INCHES NOMINAL
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNJF

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