AS9120B, ISO 9001:2015, and FAA AC 0056B Accredited
| Item Name | Screw Close Tolerance |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-805-4253 (008054253) |
| NCB Code | USA (00) |
| Manufacturer | Hi Shear Corporation, Sps Technologies Inc, Northrop Grumman Systems Corporation, Alcoa Global Fasteners Inc, Northrop Grumman Technical Services Inc, Lisi Aerospace Canada Corp |
| Part Number | Manufacturer | Item Name | RFQ |
|---|---|---|---|
| 51B221-32H | hi shear corporation | screw close tolerance | RFQ |
| 51B221-32H | sps technologies inc | screw close tolerance | RFQ |
| 51B221-32H | northrop grumman systems corporation | screw close tolerance | RFQ |
| 51B221-32H | alcoa global fasteners inc | screw close tolerance | RFQ |
| 51B221-32H | northrop grumman technical services inc | screw close tolerance | RFQ |
| 51B221-32H | lisi aerospace canada corp | screw close tolerance | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AAUR | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM |
| AAWB | SHANK UNTHREADED HOLE DIAMETER | 0.070 INCHES NOMINAL FIRST HOLE |
| CQBC | MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL OR QQ-P-416,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| AASA | THREAD LENGTH | 0.261 INCHES MINIMUM AND 0.308 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 2.260 INCHES MINIMUM AND 2.277 INCHES MAXIMUM |
| AASK | HEAD STYLE | BUTTON |
| AASL | HEAD DIAMETER | 0.391 INCHES NOMINAL |
| AASU | HEAD HEIGHT | 0.109 INCHES NOMINAL |
| ABQZ | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) |
| AHYM | NOMINAL THREAD DIAMETER | 0.190 INCHES |
| ANEE | GRIP LENGTH | 1.969 INCHES MINIMUM AND 1.999 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| CRZS | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.117 INCHES NOMINAL FIRST HOLE |
| CSYM | SURFACE FINISH | 32.0 MICROINCHES GRIP |
| MATT | MATERIAL | STEEL COMP E4340 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP 6150 OVERALL OR STEEL COMP 8735 OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| Relevant Components for NSN - 5305-00-805-4253, 5305008054253 | ||||
| 5305-01-642-0405 (5305016420405) | 5340-01-469-1045 (5340014691045) | 5315-01-562-5736 (5315015625736) | 5315-01-575-7397 (5315015757397) | |
| 5310-00-347-0214 (5310003470214) | 5320-01-073-2961 (5320010732961) | 5342-01-117-9590 (5342011179590) | 5355-00-201-5369 (5355002015369) | |
| 5305-01-321-3806 (5305013213806) | 5330-00-256-6918 (5330002566918) | 5365-01-625-0045 (5365016250045) | 5310-01-593-4780 (5310015934780) | |
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