| Item Name | Screw Shoulder |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 01-521-1800 (015211800) |
| NCB Code | USA (01) |
| Manufacturer | Lockheed Martin Corporation, Modern Manufacturing And Engineering Inc |
| Part Number | Manufacturer | Item Name | Cage Code | RFQ |
|---|---|---|---|---|
| 7220079-01 | lockheed martin corporation | screw shoulder | 90536 | RFQ |
| 7220079-01 | modern manufacturing and engineering inc | screw shoulder | 65589 | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | LEFT-HAND |
| AASA | THREAD LENGTH | 0.250 INCHES NOMINAL |
| AASB | FASTENER LENGTH | 0.450 INCHES NOMINAL |
| AASK | HEAD STYLE | FILLISTER |
| AASL | HEAD DIAMETER | 0.595 INCHES MINIMUM AND 0.605 INCHES MAXIMUM |
| AASU | HEAD HEIGHT | 0.085 INCHES MINIMUM AND 0.093 INCHES MAXIMUM |
| AATX | SHOULDER LENGTH | 0.195 INCHES MINIMUM FIRST SHOULDER AND 0.205 INCHES MAXIMUM FIRST SHOULDER |
| ABQZ | INTERNAL DRIVE STYLE | TORQUE |
| AHYM | NOMINAL THREAD DIAMETER | 0.250 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| CWYB | SHOULDER SHAPE | ROUND FIRST SHOULDER |
| THSD | THREAD SERIES DESIGNATOR | UNF |
| Relevant Components for NSN - 5305-01-521-1800, 5305015211800 | ||||
| 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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