NSN 5306-00-251-2181

Part Details | EXTERNALLY RELIEVED BODY BOLT

5306-00-251-2181 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.

Alternate Parts: 4X181C1, 5306-00-251-2181, 00-251-2181, 5306002512181, 002512181

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53JUN 13, 197300-251-218106675 ( BOLT, EXTERNALLY RELIEVED BODY )
REFERENCE DRAWINGS & PICTURES

HEXAGON

Cross Reference | NSN 5306-00-251-2181
Part Number Cage Code Manufacturer
4X181C198296STANDARD MFG CO INC
Technical Data | NSN 5306-00-251-2181
Characteristic Specifications
THREAD SERIES DESIGNATOR UNF
NOMINAL THREAD DIAMETER0.625 INCHES
THREAD QUANTITY PER INCH18
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.656 INCHES MINIMUM AND 0.718 INCHES MAXIMUM
FASTENER LENGTH1.094 INCHES MINIMUM AND 1.156 INCHES MAXIMUM
HEAD STYLE3 HEXAGON
HEAD HEIGHT0.155 INCHES MINIMUM AND 0.160 INCHES MAXIMUM
WIDTH BETWEEN FLATS1.094 INCHES MINIMUM AND 1.156 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY2
FIRST DIAMETER FROM HEAD0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM
SECOND DIAMETER FROM HEAD0.499 INCHES MINIMUM AND 0.501 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER0.313 INCHES MINIMUM AND 0.385 INCHES MAXIMUM