| Item Name | Screw Shoulder |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 01-074-6842 (010746842) |
| NCB Code | USA (01) |
| Manufacturer | Siewek Tool Co Inc |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.373 INCHES NOMINAL |
| AASB | FASTENER LENGTH | 0.875 INCHES NOMINAL |
| AASK | HEAD STYLE | FLAT CHAMFER |
| AASL | HEAD DIAMETER | 0.625 INCHES NOMINAL |
| AASU | HEAD HEIGHT | 0.188 INCHES NOMINAL |
| AATN | SHOULDER DIAMETER | 0.374 INCHES NOMINAL FIRST SHOULDER |
| AATX | SHOULDER LENGTH | 0.314 INCHES NOMINAL FIRST SHOULDER |
| ABQZ | INTERNAL DRIVE STYLE | SLOT |
| AHYM | NOMINAL THREAD DIAMETER | 0.250 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 20 |
| CWYB | SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SFTT | SURFACE TREATMENT | OXIDE OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| Relevant Components for NSN - 5305-01-074-6842, 5305010746842 | ||||
| 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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