| Item Name | Screw Shoulder |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-063-3837 (000633837) |
| NCB Code | USA (00) |
| Manufacturer | National Aerospace Standards Com |
| MRC | Criteria | Characteristic |
|---|---|---|
| MATT | Material | STEEL COMP E4340 OVERALL OR STEEL COMP 4340 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 6150 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 4130 OVERALL OR STEEL COMP 4037 OVERALL |
| AASK | Head Style | FLAT COUNTERSUNK |
| MRC | Decoded Requirement | Clear Text Reply |
| CQFM | Hardness Rating | 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| SFTT | Surface Treatment | CADMIUM OVERALL AND CHROMATE OVERALL |
| AASA | Thread Length | 0.219 INCHES MINIMUM AND 0.357 INCHES MAXIMUM |
| THSD | Thread Series Designator | UNF |
| CRSQ | Countersink Angle | 100.0 DEGREES NOMINAL |
| CQBC | Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH |
| AATN | Shoulder Diameter | 0.264 INCHES MINIMUM FIRST SHOULDER AND 0.265 INCHES MAXIMUM FIRST SHOULDER |
| CWYB | Shoulder Shape | ROUND FIRST SHOULDER |
| ABQZ | Internal Drive Style | HIGH-TORQUE |
| AASL | Head Diameter | 0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| AASB | Fastener Length | 1.362 INCHES MINIMUM AND 1.409 INCHES MAXIMUM |
| AAJF | Thread Direction | RIGHT-HAND |
| AHYM | Nominal Thread Diameter | 0.250 INCHES |
| CMLP | Thread Quantity Per Inch | 28 |
| AATX | Shoulder Length | 0.950 INCHES MINIMUM FIRST SHOULDER AND 0.972 INCHES MAXIMUM FIRST SHOULDER |
| STDC | Surface Treatment Document And Classification | QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| AAJD | Thread Class | 3A |
| Relevant Components for NSN - 5305-00-063-3837, 5305000633837 | ||||
| 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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