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National Stock Number: 5306-00-207-8567
Federal Supply Class: 5306
National Item Identification Number: 002078567
Description: BOLT,SQUARE NECK
Detail: A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
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Manufacturer Information:
70-5-6 | 99238 | AIR FORCE STANDARD | FFB571TYPEC | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
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Techincal Specification:
FASTENER LENGTH | 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM | HEAD DIAMETER | 0.688 INCHES NOMINAL | HEAD HEIGHT | 0.156 INCHES NOMINAL | HEAD STYLE | BUTTON | MATERIAL | STEEL OVERALL | MINIMUM TENSILE STRENGTH | 48000 POUNDS PER SQUARE INCH | NECK LENGTH | 0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM | NECK WIDTH | 0.300 INCHES MINIMUM AND 0.326 INCHES MAXIMUM | NOMINAL THREAD DIAMETER | 0.312 INCHES | NONDEFINITIVE SPEC/STD DATA | C2 TYPE AND C CLASS | SPECIAL FEATURES | ONE SQ NUT | THREAD CLASS | 2A | THREAD DIRECTION | RIGHT-HAND | THREAD LENGTH | 0.375 INCHES MINIMUM | THREAD QUANTITY PER INCH | 18 | THREAD SERIES DESIGNATOR | UNC |
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