| Item Name | Screw Machine |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-550-7181 (005507181) |
| NCB Code | USA (00) |
| Manufacturer | Army United States Department Of The |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 22.188 INCHES MINIMUM AND 22.312 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 22.375 INCHES NOMINAL |
| AASK | HEAD STYLE | HEXAGON EXTENDED WASHER |
| AASU | HEAD HEIGHT | 2.625 INCHES NOMINAL |
| AATB | WIDTH BETWEEN FLATS | 3.844 INCHES MINIMUM AND 3.875 INCHES MAXIMUM |
| AATC | EXTENDED WASHER DIAMETER | 4.500 INCHES NOMINAL |
| AATD | EXTENDED WASHER THICKNESS | 0.375 INCHES NOMINAL |
| CFSG | NONSTANDARD THREAD PITCH DIAMETER | 3.7500 TO 3.7832 INCHES |
| CYAU | SCREW MATERIAL | COPPER ALLOY |
| FEAT | SPECIAL FEATURES | INTERNALLY THREADED FROM HEAD ENDSTARTING 3.062 IN. BELOW HEAD 22.188 IN. MIN,22.312 IN. MAX THD LG,2 1/2-2ACME-2G-LH THD SIZE AND HEAD COUNTERBORED 3.250 IN. W,0.250 IN. DEEP |
| THSD | THREAD SERIES DESIGNATOR | ACME |
| Relevant Components for NSN - 5305-00-550-7181, 5305005507181 | ||||
| 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) | |
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