| Item Name | Screw Cap Socket Head |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-221-1658 (002211658) |
| NCB Code | USA (00) |
| Manufacturer | Taylor Dunn Corporation |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.875 INCHES NOMINAL |
| AASB | FASTENER LENGTH | 1.000 INCHES NOMINAL |
| AASK | HEAD STYLE | HEXAGON EXTENDED WASHER |
| AASU | HEAD HEIGHT | 0.323 INCHES NOMINAL |
| AATB | WIDTH BETWEEN FLATS | 0.507 INCHES NOMINAL |
| AATC | EXTENDED WASHER DIAMETER | 1.035 INCHES NOMINAL |
| AATD | EXTENDED WASHER THICKNESS | 0.040 INCHES NOMINAL |
| AAUM | LOCKING FEATURE | KNURLED BEARING SURFACE OF HEAD |
| ABQZ | INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| AHYM | NOMINAL THREAD DIAMETER | 0.375 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 16 |
| MATT | MATERIAL | STEEL OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| Relevant Components for NSN - 5305-00-221-1658, 5305002211658 | ||||
| 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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