| Item Name | Screw Cap Socket Head |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 01-365-3166 (013653166) |
| NCB Code | USA (01) |
| Manufacturer | National Aerospace Standards Com, Federal Specifications, Nimikkeistokeskus Ncb Finland, Martin Baker Aircraft Co Ltd |
| MRC | Criteria | Characteristic |
|---|---|---|
| ASDB | WIDTH ACROSS FLATS | 0.1562 INCHES MINIMUM AND 0.1587 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| MATT | MATERIAL | STEEL OVERALL |
| ZZZK | SPECIFICATION/STANDARD DATA | 80205-NAS1351 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| AASK | HEAD STYLE | FLAT CHAMFER |
| AASU | HEAD HEIGHT | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| AHYM | NOMINAL THREAD DIAMETER | 0.190 INCHES |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| AAJD | THREAD CLASS | 3A |
| AASA | THREAD LENGTH | 0.875 INCHES NOMINAL |
| CQBC | MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| CQHQ | MINIMUM YIELD STRENGTH | 150000 POUNDS PER SQUARE INCH |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASB | FASTENER LENGTH | 1.013 INCHES MINIMUM AND 1.063 INCHES MAXIMUM |
| AASL | HEAD DIAMETER | 0.303 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
| ABQZ | INTERNAL DRIVE STYLE | HEXAGON |
| CQFM | HARDNESS RATING | 38.0 ROCKWELL C MINIMUM OVERALL AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNRF |
| Relevant Components for NSN - 5305-01-365-3166, 5305013653166 | ||||
| 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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