2840-99-738-9625 CASE ASSEMBLY,MAIN SCAVENGE PUMP Index 2840-99-738-9628 CASING ASSEMBLY,SCAVENGE PUMP

National Stock Number:
5306-99-738-9626

Federal Supply Class:
5306

National Item Identification Number:
997389626

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:
B496739K0378ROLLS-ROYCE PLC


Techincal Specification:
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.200 INCHES MINIMUM AND 0.240 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER3.560 INCHES MINIMUM AND 3.600 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER1.600 INCHES MINIMUM AND 1.640 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER1.840 INCHES MINIMUM AND 1.880 INCHES MAXIMUM
CRITICALITY CODE JUSTIFICATIONAAWC AND AAWE
FASTENER LENGTH4.390 INCHES MINIMUM AND 4.410 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD0.2489 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM
HEAD HEIGHT0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM
HEAD STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONBS HR650 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE
MATERIALSTEEL
NOMINAL THREAD DIAMETER0.250 INCHES
SECOND DIAMETER FROM HEAD0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM
SPECIAL FEATURES0.2435/0.2480 IN.THD SIZE;UNJF MOD THD
WIDTH BETWEEN FLATS0.431 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONDTD 939 MIL STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTSILVER OVERALL
THIRD DIAMETER FROM HEAD0.2489 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.820 INCHES NOMINAL
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNJF


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