5306-00-003-6543, BOLT,INTERNALLY RELIEVED BODY

5306-00-003-6544 BOLT,INTERNALLY RELIEVED BODY

National Stock Number:
5306-00-003-6543

Federal Supply Class:
5306

National Item Identification Number:
000036543

Description:
BOLT,INTERNALLY RELIEVED BODY

Detail:
An externally threaded fastener whose external threaded portion is of one nominal diameter. It has a concentric hole along the longitudinal centerline which may extend a part or the full length of the bolt. The concentric hole along the centerline may be counterbored and/or internally threaded at the head end or the bolt end. The head is designed to be held or driven by an external and/or internal driver. For items having a hole(s) perpendicular to the axis which meet the concentric hole along the longitudinal centerline, see BOLT, FLUID PASSAGE.

Manufacturer Information:

A51B24628-11	26512	NORTHROP GRUMMAN SYSTEMS CORPORATION
A51B24628-11	61174	NORTHROP GRUMMAN SYSTEMS CORPORATION
A51B24628-11	79RG9	NORTHROP GRUMMAN SYSTEMS CORPORATION

Techincal Specification:

CONCENTRIC HOLE DIAMETER	0.250 INCHES NOMINAL
CONCENTRIC HOLE DEPTH	1.674 INCHES MINIMUM AND 1.689 INCHES MAXIMUM
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	2.297 INCHES MINIMUM AND 2.302 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH	2.494 INCHES MINIMUM AND 2.499 INCHES MAXIMUM
HARDNESS RATING	46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	1.335 INCHES NOMINAL
HEAD HEIGHT	0.125 INCHES NOMINAL
HEAD STYLE	ROUND W/WRENCH FLATS
MATERIAL	STEEL OVERALL
NOMINAL THREAD DIAMETER	0.375 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE
SHOULDER DIAMETER	0.8675 INCHES MINIMUM AND 0.8686 INCHES MAXIMUM
SHOULDER LENGTH	1.884 INCHES MINIMUM AND 1.889 INCHES MAXIMUM
STYLE DESIGNATOR	CONCENTRIC HOLE UNTHREADED
SURFACE TREATMENT	CADMIUM OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.610 INCHES MINIMUM
THREAD QUANTITY PER INCH	24
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)
WIDTH BETWEEN FLATS	1.250 INCHES NOMINAL

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