| Item Name | Screw Cap Socket Head |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-558-9918 (005589918) |
| NCB Code | USA (00) |
| Manufacturer | Eaton Aerospace Ltd, General Signal Corp |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A |
| AASA | THREAD LENGTH | 0.500 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 0.500 INCHES NOMINAL |
| AASL | HEAD DIAMETER | 0.306 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
| AASU | HEAD HEIGHT | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| AHYM | NOMINAL THREAD DIAMETER | 0.190 INCHES |
| ASDB | WIDTH ACROSS FLATS | 0.156 INCHES NOMINAL |
| CMLP | THREAD QUANTITY PER INCH | 24 |
| CQFM | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM OVERALL AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| AASK | HEAD STYLE | FLAT CHAMFER |
| ABQZ | INTERNAL DRIVE STYLE | HEXAGON |
| CQBC | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| Relevant Components for NSN - 5305-00-558-9918, 5305005589918 | ||||
| 5320-01-093-5687 (5320010935687) | 5340-00-286-8500 (5340002868500) | 5310-00-797-4430 (5310007974430) | 5331-01-548-6940 (5331015486940) | |
| 5340-01-389-2408 (5340013892408) | 5340-01-499-3481 (5340014993481) | 5310-01-418-9739 (5310014189739) | 5320-01-419-8697 (5320014198697) | |
| 5340-01-681-6722 (5340016816722) | 5340-01-620-4639 (5340016204639) | 5340-01-481-2087 (5340014812087) | 5331-01-097-0869 (5331010970869) | |
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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