| Item Name | Screw Cap Socket Head |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-521-8637 (005218637) |
| NCB Code | USA (00) |
| Manufacturer | Kleinschmidt Inc, General Motors Corp |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.168 INCHES MINIMUM |
| AASB | FASTENER LENGTH | 0.240 INCHES MINIMUM AND 0.270 INCHES MAXIMUM |
| AASK | HEAD STYLE | FLAT CHAMFER |
| AASL | HEAD DIAMETER | 0.221 INCHES MINIMUM AND 0.226 INCHES MAXIMUM |
| AASU | HEAD HEIGHT | 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM |
| ABQZ | INTERNAL DRIVE STYLE | HEXAGON |
| AHYM | NOMINAL THREAD DIAMETER | 0.138 INCHES |
| ASDB | WIDTH ACROSS FLATS | 0.094 INCHES MINIMUM AND 0.095 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 40 |
| CQFM | HARDNESS RATING | 38.0 ROCKWELL C MINIMUM OVERALL AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| MATT | MATERIAL | STEEL COMP 4037 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | PHOSPHATE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNF |
| Components Related to NSN - 5305-00-521-8637, 5305005218637 | ||||
| 5305-01-222-3196 (5305012223196) | 5340-01-420-2904 (5340014202904) | 5305-01-506-5038 (5305015065038) | 5307-01-093-0586 (5307010930586) | |
| 5306-01-455-2212 (5306014552212) | 5320-01-425-9724 (5320014259724) | 5330-01-429-5246 (5330014295246) | 5340-01-359-3660 (5340013593660) | |
| 5330-01-524-1191 (5330015241191) | 5320-00-395-6445 (5320003956445) | 5310-01-510-7415 (5310015107415) | 5310-01-104-8190 (5310011048190) | |
If You’re Ever Looking for NSN parts Or Have an Aircraft On Ground Situation, Don’t forget That We offer Competitive Pricing and Guaranteed On-Time Delivery.
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