5306-01-020-2439, BOLT,EXTERNALLY RELIEVED BODY

5306-01-020-2440 BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-01-020-2439

Federal Supply Class:
5306

National Item Identification Number:
010202439

Description:
BOLT,EXTERNALLY RELIEVED BODY

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercuts for thread relief). It is No. 10 (0.190 IN.) (5 mm) or larger in size and has a head which is not designed to be held or driven with an inserted driver or designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, INTERNAL WRENCHING and THUMBSCREW. See also SCREW, EXTERNALLY RELIEVED BODY.

Manufacturer Information:

SPE16N25	03950	NAVAL INVENTORY CONTROL POINT MECHANICSBURG
SPE16N25	52096	ROLLS-ROYCE INC
SPE16N25	K0378	ROLLS-ROYCE PLC
SPE16N25	K0680	ROLLS-ROYCE AIRLINES

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	1.500 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.250 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	2
FIRST DIAMETER FROM HEAD	0.496 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
HEAD HEIGHT	0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM
PART NAME ASSIGNED BY CONTROLLING AGENCY	NAVY SPECIAL PROJECT
MATERIAL DOCUMENT AND CLASSIFICATION	EN165,FSCM K0378 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER	0.500 INCHES
SECOND DIAMETER FROM HEAD	0.415 INCHES MINIMUM AND 0.425 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	DTD904,FSCM K0378 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OVERALL
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.750 INCHES NOMINAL
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	20
WIDTH BETWEEN FLATS	0.742 INCHES MINIMUM AND 0.750 INCHES MAXIMUM

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