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National Stock Number:
5306-01-298-1289
Federal Supply Class:
5306
National Item Identification Number:
012981289
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:
| ST1420-09 | 15653 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST1420-09 | 52661 | RTX CORPORATION | | ST1420-09 | 56878 | SPS TECHNOLOGIES, LLC | | ST1420-09 | 77445 | RTX CORPORATION | | ST1420-09 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST1420-09 | U6683 | LINREAD LTD DBA LINREAD NORTHBRIDGE |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.579 INCHES MINIMUM AND | | 0.673 INCHES MAXIMUM | | FASTENER LENGTH | 0.678 INCHES MINIMUM AND | | 0.698 INCHES MAXIMUM | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | HEAD STYLE | DOUBLE HEXAGON EXTENDED WASHER | | HEAD HEIGHT | 0.293 INCHES MINIMUM AND | | 0.313 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.312 INCHES NOMINAL | | EXTENDED WASHER DIAMETER | 0.428 INCHES MINIMUM AND | | 0.448 INCHES MAXIMUM | | EXTENDED WASHER THICKNESS | 0.060 INCHES MINIMUM | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 | | FIRST DIAMETER FROM HEAD | 0.222 INCHES MINIMUM AND | | 0.232 INCHES MAXIMUM | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.099 INCHES MAXIMUM |
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