AS9120B, ISO 9001:2015, and FAA AC 0056B Accredited
| Item Name | Screw Shoulder |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-151-8663 (001518663) |
| NCB Code | USA (00) |
| Manufacturer | Aero Mechanical Fastening Systems Inc, Sps Technologies Inc, Bf Goodrich Aerospace, Northrop Grumman Systems Corporation |
| Part Number | Manufacturer | Item Name | RFQ |
|---|---|---|---|
| GS551C3-218 | aero mechanical fastening systems inc | screw shoulder | RFQ |
| AIC551C3-218 | sps technologies inc | screw shoulder | RFQ |
| GS551C3-218 | bf goodrich aerospace | screw shoulder | RFQ |
| B1990-01 | bf goodrich aerospace | screw shoulder | RFQ |
| GS551C3-218 | sps technologies inc | screw shoulder | RFQ |
| GS551C3-218 | northrop grumman systems corporation | screw shoulder | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.279 INCHES MINIMUM AND 0.339 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 0.454 INCHES MINIMUM AND 0.484 INCHES MAXIMUM |
| AASK | HEAD STYLE | FLAT COUNTERSUNK |
| AASL | HEAD DIAMETER | 0.276 INCHES NOMINAL |
| AATN | SHOULDER DIAMETER | 0.105 INCHES MINIMUM AND 0.135 INCHES MAXIMUM FIRST SHOULDER |
| AATX | SHOULDER LENGTH | 0.193 INCHES MINIMUM AND 0.195 INCHES MAXIMUM FIRST SHOULDER |
| ABQZ | INTERNAL DRIVE STYLE | SLOT |
| AHYM | NOMINAL THREAD DIAMETER | 0.190 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| CQFM | HARDNESS RATING | 33.0 ROCKWELL C MINIMUM AND 87.0 ROCKWELL C MAXIMUM OVERALL |
| CRSQ | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| CWYB | SHOULDER SHAPE | ROUND FIRST SHOULDER |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| MATT | MATERIAL | STEEL COMP 4037 OR STEEL COMP 8740 OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNF |
| Relevant Components for NSN - 5305-00-151-8663, 5305001518663 | ||||
| 5305-00-825-1285 (5305008251285) | 5315-01-177-1845 (5315011771845) | 5340-01-536-0624 (5340015360624) | 5330-01-398-3824 (5330013983824) | |
| 5365-00-602-2520 (5365006022520) | 5340-01-658-6711 (5340016586711) | 5306-00-488-7520 (5306004887520) | 5310-00-443-4905 (5310004434905) | |
| 5305-00-579-4230 (5305005794230) | 5306-01-488-3599 (5306014883599) | 5340-01-429-0378 (5340014290378) | 5305-01-208-9074 (5305012089074) | |
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