| Item Name | Thumbscrew |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-679-0837 (006790837) |
| NCB Code | USA (00) |
| Manufacturer | Trw Limited |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.468 INCHES MINIMUM AND 0.532 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM |
| AASK | HEAD STYLE | WING NO. 2 |
| AASU | HEAD HEIGHT | 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM |
| AATB | WIDTH BETWEEN FLATS | 1.234 INCHES MINIMUM AND 1.266 INCHES MAXIMUM |
| AAWC | FIRST DIAMETER FROM HEAD | 0.172 INCHES MINIMUM AND 0.204 INCHES MAXIMUM |
| AAWH | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM |
| ABQJ | POINT STYLE | FLAT |
| AHYM | NOMINAL THREAD DIAMETER | 0.250 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 20 |
| MATT | MATERIAL | STEEL OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| Relevant Components for NSN - 5305-00-679-0837, 5305006790837 | ||||
| 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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