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National Stock Number: 5306-99-738-0485
Federal Supply Class: 5306
National Item Identification Number: 997380485
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.
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Manufacturer Information:
B474498 | K0378 | ROLLS-ROYCE PLC |
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Techincal Specification:
FASTENER LENGTH | 1.940 INCHES MINIMUM | FASTENER LENGTH | 1.960 INCHES MAXIMUM | HEAD HEIGHT | 0.146 NOMINAL MILS | HEAD HEIGHT | 0.166 NOMINAL CENTIMETERS | NOMINAL THREAD DIAMETER | 0.250 INCHES | SPECIAL FEATURES | BODY 0.248 IN. NOM DIA UNDERCUT TO 0.192 IN. NOM DIA | THREAD CLASS | 3A | THREAD DIRECTION | RIGHT-HAND | THREAD QUANTITY PER INCH | 28 | THREAD SERIES DESIGNATOR | UNJF |
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