| 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 | Hi Shear Corporation, Huck International Inc, Heartland Precision Fasteners In, Boeing Company The, Valley Todeco Inc, Reid Products Inc, Sps Technologies Inc, West Coast Aerospace Inc, Houston Precision Fastener L L C, Alcoa Global Fasteners Inc, Fastener Innovation Technology Inc |
| Part Number | Manufacturer | Item Name | RFQ |
|---|---|---|---|
| HT4020-6-21AX | hi shear corporation | screw shoulder | RFQ |
| HT4020-6-21AX | huck international inc | screw shoulder | RFQ |
| ST3M653C6-21A | heartland precision fasteners in | screw shoulder | RFQ |
| ST3M653C6-21A | boeing company the | screw shoulder | RFQ |
| ST3M653C6-21A | valley todeco inc | screw shoulder | RFQ |
| 11927C6-21A | reid products inc | screw shoulder | RFQ |
| HT4020-6-21AX | sps technologies inc | screw shoulder | RFQ |
| WC4020-6-21AX | west coast aerospace inc | screw shoulder | RFQ |
| ST3M653C6-21A | houston precision fastener l l c | screw shoulder | RFQ |
| HT4020-6-21AX | alcoa global fasteners inc | screw shoulder | RFQ |
| ST3M653C6-21A | fastener innovation technology inc | 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 | ||||
| 5320-01-318-6843 (5320013186843) | 5340-01-557-4760 (5340015574760) | 5340-00-336-3776 (5340003363776) | 5340-01-560-8528 (5340015608528) | |
| 5330-01-684-2979 (5330016842979) | 5310-01-185-8686 (5310011858686) | 5360-00-394-4491 (5360003944491) | 5320-01-267-6376 (5320012676376) | |
| 5315-00-432-8021 (5315004328021) | 5315-01-271-9296 (5315012719296) | 5340-01-353-1927 (5340013531927) | 5320-01-413-1816 (5320014131816) | |
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