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National Stock Number:
5305-00-183-0248
Federal Supply Class:
5305
National Item Identification Number:
001830248
Description:
SCREW,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 undercut for thread relief). It is No. 0 (0.060 IN.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below No. 10 (0.190 IN.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also BOLT, EXTERNALLY RELIEVED BODY and BOLT, INTERNAL WRENCHING.
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Manufacturer Information:
| 21529 | 07270 | MOOG INC. | | 21529 | 32970 | AIRCRAFT PARTS CORPORATION | | 21529 | 94931 | BENDIX CORP THE BENDIX INTERNATIONAL DIV | | 21529 | 95270 | SKURKA AEROSPACE INC |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.359 INCHES NOMINAL FIRST HOLE | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.094 INCHES NOMINAL | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 1.062 INCHES NOMINAL | | FASTENER LENGTH | 1.438 INCHES NOMINAL | | FIRST DIAMETER FROM HEAD | 0.296 INCHES NOMINAL | | HEAD DIAMETER | 0.438 INCHES NOMINAL | | HEAD HEIGHT | 0.125 INCHES NOMINAL | | HEAD STYLE | FLAT CHAMFER | | INTERNAL DRIVE STYLE | SLOT | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | SECOND DIAMETER FROM HEAD | 0.310 INCHES MINIMUM AND 0.311 INCHES MAXIMUM | | SHANK UNTHREADED HOLE DIAMETER | 0.070 INCHES NOMINAL FIRST HOLE | | THREAD CLASS | 3A | | THREAD LENGTH | 0.375 INCHES MINIMUM | | THREAD QUANTITY PER INCH | 24 | | THREAD SERIES DESIGNATOR | UNF |
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