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National Stock Number: 5306-00-527-3522
Federal Supply Class: 5306
National Item Identification Number: 005273522
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:
| 70-4-46 | 80049 | DEPARTMENT OF THE AIR FORCE | | 70-4-46 | 99238 | AIR FORCE STANDARD | | FF571 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.875 INCHES MINIMUM | | FASTENER LENGTH | 4.750 INCHES NOMINAL | | MATERIAL | STEEL OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | FF-B-571 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 48000 POUNDS PER SQUARE INCH | | HEAD STYLE | BUTTON | | HEAD DIAMETER | 0.563 INCHES NOMINAL | | HEAD HEIGHT | 0.125 INCHES NOMINAL | | NECK LENGTH | 0.219 INCHES NOMINAL | | NECK WIDTH | 0.250 INCHES NOMINAL | | FEATURES PROVIDED | SQUARE NUT | | NONDEFINITIVE SPEC/STD DATA | C2 TYPE AND | | C CLASS | | SPEC/STD CONTROLLING DATA | | | MANUFACTURERS CODE | 81348 | | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FF571 | | MANUFACTURERS CODE | 99238 | | DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | 70-4-46 |
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