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| Item Name | Bolt Shoulder |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5306 Bolts |
| National Item Identification Number (NIIN) | 01-399-6957 (013996957) |
| NCB Code | USA (01) |
| Manufacturer | Grimes Aerospace Company |
| MRC | Criteria | Characteristic |
|---|---|---|
| MRC | Decoded Requirement | Clear Text Reply |
| AATB | Width Between Flats | 0.375 INCHES NOMINAL |
| CWYB | Shoulder Shape | ROUND FIRST SHOULDER |
| MATT | Material | STEEL COMP 630 OVERALL |
| AASK | Head Style | HEXAGON |
| SFTT | Surface Treatment | OXIDE OVERALL |
| AASA | Thread Length | 0.312 INCHES NOMINAL |
| AAJF | Thread Direction | RIGHT-HAND |
| HUES | Color | BLACK OVERALL |
| THSD | Thread Series Designator | UNJF |
| AATX | Shoulder Length | 0.968 INCHES NOMINAL FIRST SHOULDER |
| CQFM | Hardness Rating | 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| AASB | Fastener Length | 1.280 INCHES NOMINAL |
| CMLP | Thread Quantity Per Inch | 28 |
| AAJD | Thread Class | 2A |
| AHYM | Nominal Thread Diameter | 0.250 INCHES |
| AATN | Shoulder Diameter | 0.311 INCHES MINIMUM FIRST SHOULDER AND 0.312 INCHES MAXIMUM FIRST SHOULDER |
| AASU | Head Height | 0.125 INCHES NOMINAL |
| MDCL | Material Document And Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| STDC | Surface Treatment Document And Classification | MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Relevant Components for NSN - 5306-01-399-6957, 5306013996957 | ||||
| 5305-00-151-0390 (5305001510390) | 5305-00-162-0212 (5305001620212) | 5330-01-021-6193 (5330010216193) | 5306-01-667-2305 (5306016672305) | |
| 5305-00-702-7578 (5305007027578) | 5306-01-467-0619 (5306014670619) | 5340-14-507-0973 (5340145070973) | 5330-01-545-5049 (5330015455049) | |
| 5331-01-433-9967 (5331014339967) | 5330-01-176-0563 (5330011760563) | 5330-20-001-0516 (5330200010516) | 5305-00-550-9932 (5305005509932) | |
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