AS9120B, ISO 9001:2015, and FAA AC 0056B Accredited
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| Item Name | Screw Shoulder |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-637-0304 (006370304) |
| NCB Code | USA (00) |
| Manufacturer | Navair And Navsea Managed |
| MRC | Criteria | Characteristic |
|---|---|---|
| AASK | Head Style | FLAT CHAMFER |
| AHYM | Nominal Thread Diameter | 0.500 INCHES |
| ASDB | Width Across Flats | 0.312 INCHES NOMINAL |
| MRC | Decoded Requirement | Clear Text Reply |
| AATX | Shoulder Length | 1.156 INCHES NOMINAL FIRST SHOULDER |
| SFTT | Surface Treatment | PHOSPHATE OVERALL |
| FEAT | Special Features | RELIEVED UNDER HEAD 0.093 IN. W 0.593 IN. DIA. OF RELIEF AND RELIEVED AT BASE OF THD. 0.093 IN. W 0.390 IN. DIA. OF RELIEF |
| AAJF | Thread Direction | RIGHT-HAND |
| ABQZ | Internal Drive Style | HEXAGON |
| AASL | Head Diameter | 0.863 INCHES MINIMUM AND 0.875 INCHES MAXIMUM |
| AASA | Thread Length | 0.657 INCHES MINIMUM |
| THSD | Thread Series Designator | UNC |
| AASB | Fastener Length | 2.000 INCHES NOMINAL |
| AATN | Shoulder Diameter | 0.6254 INCHES MINIMUM FIRST SHOULDER AND 0.6259 INCHES MAXIMUM FIRST SHOULDER |
| CWYB | Shoulder Shape | ROUND FIRST SHOULDER |
| AAJD | Thread Class | 3A |
| CMLP | Thread Quantity Per Inch | 13 |
| MATT | Material | STEEL COMP 1137 OVERALL OR STEEL COMP 1139 OVERALL OR STEEL COMP 1140 OVERALL OR STEEL COMP 1141 OVERALL OR STEEL COMP 1144 OVERALL |
| AASU | Head Height | 0.618 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| Relevant Components for NSN - 5305-00-637-0304, 5305006370304 | ||||
| 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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