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		                        | National Stock Number:
 5310-01-497-3152
 
 Federal Supply Class:
 5310
 
 National Item Identification Number:
 014973152
 
 Description:
 NUT,SELF-LOCKING,HEXAGON
 
 Detail:
 A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes NUT (1), SELF-LOCKING, CAP.
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 Manufacturer Information:
 
 | 0.31218UNC2BT1G400NSA/BEB | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |  | M122N1X5C20NAL | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |  | MIL-DTL-122 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |  | MIL-S-1222 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | 
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 Techincal Specification:
 
 | THREAD DIRECTION | RIGHT-HAND |  | MATERIAL | NICKEL ALLOY 400 OVERALL |  | NUT STYLE | HEXAGON |  | LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |  | BEARING SURFACE TYPE | CHAMFERED OR |  |  | WASHER FACED |  | THREAD SERIES | UNC |  | NOMINAL THREAD SIZE | 0.312 INCHES |  | THREAD QUANTITY PER INCH | 18 |  | THREAD CLASS | 2B |  | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |  | HARDNESS RATING | 80.0 ROCKWELL C MINIMUM |  | NUT HEIGHT | 0.258 INCHES MINIMUM AND |  |  | 0.273 INCHES MAXIMUM |  | WIDTH ACROSS FLATS | 0.489 INCHES MINIMUM AND |  |  | 0.500 INCHES MAXIMUM |  | SPEC/STD CONTROLLING DATA |  |  | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-DTL-122 |  | MANUFACTURERS CODE | 81349 |  | DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | M122N1X5C20NAL | 
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