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		                        | National Stock Number:
 5310-00-199-3746
 
 Federal Supply Class:
 5310
 
 National Item Identification Number:
 001993746
 
 Description:
 NUT,SELF-LOCKING,EXTENDED WASHER
 
 Detail:
 A nut having 12 drive points, 24 sides, and an integral washer which extends beyond the points or periphery. An integral feature is incorporated for locking on the threads of a mating member.
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 Manufacturer Information:
 
 | 649734 | 77445 | RTX CORPORATION |  | B00106-4 | 27238 | BRISTOL INDUSTRIES, LLC |  | H29605-4 | 15653 | HOWMET GLOBAL FASTENING SYSTEMS INC |  | H29605-4 | 75237 | HOWMET GLOBAL FASTENING SYSTEMS INC. |  | ST1178-10 | 77445 | RTX CORPORATION | 
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 Techincal Specification:
 
 | THREAD SERIES | UNJF |  | NOMINAL THREAD SIZE | 0.250 INCHES |  | THREAD QUANTITY PER INCH | 28 |  | THREAD CLASS | 3B |  | THREAD DIRECTION | RIGHT-HAND |  | MATERIAL | STEEL COMP 1035 OVERALL |  | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5080 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |  | SURFACE TREATMENT | CADMIUM OVERALL |  | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |  | NUT STYLE | DOUBLE HEXAGON |  | WASHER OUTSIDE DIAMETER | 0.428 INCHES MINIMUM AND |  |  | 0.438 INCHES MAXIMUM |  | OVERALL HEIGHT | 0.225 INCHES MINIMUM AND |  |  | 0.235 INCHES MAXIMUM |  | WASHER THICKNESS | 0.020 INCHES MINIMUM AND |  |  | 0.030 INCHES MAXIMUM |  | WIDTH ACROSS FLATS | 0.305 INCHES MINIMUM AND |  |  | 0.313 INCHES MAXIMUM |  | LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |  | COUNTERSINK ANGLE | 85.0 DEGREES MINIMUM AND |  |  | 95.0 DEGREES MAXIMUM NUT |  | SPEC/STD CONTROLLING DATA |  |  | MANUFACTURERS CODE | 77445 |  | MFR SOURCE CONTROLLING REFERENCE | ST1178-10 | 
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