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National Stock Number: 5306-00-012-6638
Federal Supply Class: 5306
National Item Identification Number: 000126638
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:
FFB584 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
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Techincal Specification:
FASTENER LENGTH | 4.000 INCHES NOMINAL | HEAD HEIGHT | 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM | HEAD DIAMETER | 0.563 INCHES MINIMUM AND 0.594 INCHES MAXIMUM | HEAD STYLE | BUTTON | NECK LENGTH | 0.125 INCHES MINIMUM AND 0.156 INCHES MAXIMUM | NECK WIDTH | 0.245 INCHES MINIMUM AND 0.260 INCHES MAXIMUM | NOMINAL THREAD DIAMETER | 0.250 INCHES | NONDEFINITIVE SPEC/STD DATA | I TYPE AND 1 CLASS AND A STYLE | SURFACE TREATMENT | CADMIUM OR ZINC OVERALL | THREAD CLASS | 2A | THREAD DIRECTION | RIGHT-HAND | THREAD LENGTH | 0.750 INCHES MINIMUM | THREAD QUANTITY PER INCH | 20 | THREAD SERIES DESIGNATOR | UNC |
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