5306-00-517-5530, BOLT,INTERNALLY RELIEVED BODY

National Stock Number:
5306-00-517-5530

Federal Supply Class:
5306

National Item Identification Number:
005175530

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:

5175530

19204

ARMY, UNITED STATES DEPARTMENT OF THE

Techincal Specification:

CONCENTRIC HOLE DEPTH	2.625 INCHES NOMINAL
CONCENTRIC HOLE DIAMETER	0.250 INCHES NOMINAL
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	2.813 INCHES NOMINAL FIRST HOLE
FASTENER LENGTH	5.125 INCHES NOMINAL
HEAD HEIGHT	0.312 INCHES NOMINAL
HEAD STYLE	HEXAGON
INTERNAL THREAD LENGTH	0.375 INCHES NOMINAL COUNTERBORE
MATERIAL	STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 1045 OVERALL
NOMINAL THREAD DIAMETER	1.250 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.188 INCHES NOMINAL FIRST HOLE
SHOULDER LENGTH	3.960 INCHES MINIMUM AND 3.970 INCHES MAXIMUM
SHOULDER DIAMETER	1.498 INCHES MINIMUM AND 1.499 INCHES MAXIMUM
SPECIAL FEATURES	CHAMFER 0.031 IN. LG BY 45.0 DEG ON BOTH ENDS OF DRILLED HOLE
STYLE DESIGNATOR	COUNTERBORE THREADED
SURFACE TREATMENT	OXIDE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	4.959 INCHES MINIMUM
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
THREAD SERIES	UNF FIRST HOLE
THREAD QUANTITY PER INCH	12
WIDTH BETWEEN FLATS	2.000 INCHES NOMINAL

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