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		                        | National Stock Number:
 5310-01-556-5554
 
 Federal Supply Class:
 5310
 
 National Item Identification Number:
 015565554
 
 Description:
 NUT,PLAIN,HEXAGON
 
 Detail:
 A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see LOCKNUT, ELECTRICAL CONDUIT. See also LOCKNUT, TUBE FITTING. For items having a thickness (or height) exceeding two times the width across the flats, use POST, ELECTRICAL-MECHANICAL EQUIPMENT. (When height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
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 Manufacturer Information:
 
 | 10039380 | 61C19 | MIL-COTS CORPORATION |  | 12759-00531 | 0Y3H3 | FASTENAL COMPANY |  | 3011561 | 0B9F4 | RKR TECHNOLOGIES, LTD. |  | 3011561 | 1EFH8 | GENERAL DYNAMICS LAND SYSTEMS - FORCE PROTECTION INC. |  | 3011561 | 3T063 | MOTOR CITY FASTENERS INC |  | 3011561 | 4JEL0 | REXEL USA, INC. |  | 40162 | 0Y3H3 | FASTENAL COMPANY |  | S000019 | 1EFH8 | GENERAL DYNAMICS LAND SYSTEMS - FORCE PROTECTION INC. |  | ESP-EM-3.101-GS | 338X5 | ND DEFENSE LLC |  | ESP-EM-3.104-PP | 338X5 | ND DEFENSE LLC |  | 31082R1 | 338X5 | ND DEFENSE LLC |  | 3011561 | 57550 | RELLI TECHNOLOGY, INC |  | 3011561 | 7W356 | GENERAL DYNAMICS LAND SYSTEMS INC. |  | 31082R1 | 89346 | NAVISTAR INTL CORP TRUCK BR OHIO PLANT | 
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 Techincal Specification:
 
 | BEARING SURFACE TYPE | FLAT |  | MATERIAL DOCUMENT AND CLASSIFICATION | DIN 267, PART 4, CLASS 8 ASSN STD ALL MATERIAL RESPONSES OVERALL |  | MATERIAL | STEEL OVERALL |  | III PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT, HEX WELD PREV TORQ METRIC, M8X1.25 CLASS 8 PHC FLG |  | PROPRIETARY CHARACTERISTICS | NPAC |  | NOMINAL THREAD SIZE | 8.0 MILLIMETERS |  | NUT HEIGHT | 6.14 MILLIMETERS MINIMUM AND 6.50 MILLIMETERS MAXIMUM |  | NUT STYLE | HEXAGON |  | SPECIAL FEATURES | HEX FLANGE NUTS |  | WIDTH ACROSS FLATS | 12.73 MILLIMETERS MINIMUM AND 13.00 MILLIMETERS MAXIMUM |  | THREAD CLASS | 6H |  | THREAD DIRECTION | RIGHT-HAND |  | THREAD PITCH IN MILLIMETERS | 1.25 |  | THREAD SERIES | M | 
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