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		                        | National Stock Number:
 5306-01-545-3643
 
 Federal Supply Class:
 5306
 
 National Item Identification Number:
 015453643
 
 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:
 
 | B.18.5.2.1 | 80204 | AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED |  | B18521B16040N | 80204 | AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED | 
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 Techincal Specification:
 
 | THREAD SERIES DESIGNATOR | M |  | NOMINAL THREAD DIAMETER | 16.0 MILLIMETERS |  | THREAD PITCH IN MILLIMETERS | 2.0 |  | EXTERNAL THREAD TOLERANCE CLASS | 6G |  | THREAD DIRECTION | RIGHT-HAND |  | THREAD LENGTH | 38.0 MILLIMETERS NOMINAL |  | FASTENER LENGTH | 40.0 MILLIMETERS NOMINAL |  | MATERIAL | STEEL CORROSION RESISTING OVERALL |  | HEAD STYLE | ROUND |  | HEAD DIAMETER | 35.0 MILLIMETERS MAXIMUM |  | HEAD HEIGHT | 8.0 MILLIMETERS MINIMUM AND |  |  | 8.9 MILLIMETERS MAXIMUM |  | NECK LENGTH | 20.5 MILLIMETERS MINIMUM AND |  |  | 23.6 MILLIMETERS MAXIMUM |  | NECK WIDTH | 2.4 MILLIMETERS MINIMUM AND |  |  | 3.0 MILLIMETERS MAXIMUM | 
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