AS9120B, ISO 9001:2015, and FAA AC 0056B Accredited
| Item Name | Screw Shoulder |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 01-568-1024 (015681024) |
| NCB Code | USA (01) |
| Manufacturer | Heartland Precision Fasteners In, Houston Precision Fastener L L C, Sps Technologies Inc, Reid Products Inc, Fastener Innovation Technology Inc, West Coast Aerospace Inc, Huck International Inc, Valley Todeco Inc, Hi Shear Corporation, Alcoa Global Fasteners Inc, Boeing Company The |
| Part Number | Manufacturer | Item Name | RFQ |
|---|---|---|---|
| ST3M653C6-21A | heartland precision fasteners in | screw shoulder | RFQ |
| ST3M653C6-21A | houston precision fastener l l c | screw shoulder | RFQ |
| HT4020-6-21AX | sps technologies inc | screw shoulder | RFQ |
| 11927C6-21A | reid products inc | screw shoulder | RFQ |
| ST3M653C6-21A | fastener innovation technology inc | screw shoulder | RFQ |
| WC4020-6-21AX | west coast aerospace inc | screw shoulder | RFQ |
| HT4020-6-21AX | huck international inc | screw shoulder | RFQ |
| ST3M653C6-21A | valley todeco inc | screw shoulder | RFQ |
| HT4020-6-21AX | hi shear corporation | screw shoulder | RFQ |
| HT4020-6-21AX | alcoa global fasteners inc | screw shoulder | RFQ |
| ST3M653C6-21A | boeing company the | screw shoulder | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.641 INCHES NOMINAL |
| AASB | FASTENER LENGTH | 1.953 INCHES NOMINAL |
| AASK | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT |
| AASL | HEAD DIAMETER | 0.756 INCHES MINIMUM AND 0.760 INCHES MAXIMUM |
| AASU | HEAD HEIGHT | 0.109 INCHES MINIMUM AND 0.111 INCHES MAXIMUM |
| AATN | SHOULDER DIAMETER | 0.389 INCHES MINIMUM FIRST SHOULDER AND 0.390 INCHES MAXIMUM FIRST SHOULDER |
| AATX | SHOULDER LENGTH | 1.129 INCHES MINIMUM FIRST SHOULDER AND 1.151 INCHES MAXIMUM FIRST SHOULDER |
| ABQZ | INTERNAL DRIVE STYLE | HIGH-TORQUE |
| AHYM | NOMINAL THREAD DIAMETER | 0.375 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 24 |
| CRSQ | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| CWYB | SHOULDER SHAPE | ROUND FIRST SHOULDER |
| FEAT | SPECIAL FEATURES | FURNISHED WITH ONE RUBBER O RING |
| MATT | MATERIAL | STEEL COMP XM-13 OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNJF |
| Relevant Components for NSN - 5305-01-568-1024, 5305015681024 | ||||
| 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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