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) | 00-338-2078 (003382078) |
| NCB Code | USA (00) |
| Manufacturer | Hi Shear Corporation, Sps Technologies Inc, Lisi Aerospace Canada Corp, Northrop Grumman Systems Corporation, Northrop Grumman Technical Services Inc, Alcoa Global Fasteners Inc |
| Part Number | Manufacturer | Item Name | RFQ |
|---|---|---|---|
| 51B581-5-12 | hi shear corporation | screw close tolerance | RFQ |
| 51B581-5-12 | sps technologies inc | screw close tolerance | RFQ |
| 51B581-5-12 | lisi aerospace canada corp | screw close tolerance | RFQ |
| 51B581-5-12 | northrop grumman systems corporation | screw close tolerance | RFQ |
| 51B581-5-12 | northrop grumman technical services inc | screw close tolerance | RFQ |
| 51B581-5-12 | alcoa global fasteners inc | screw close tolerance | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.349 INCHES MINIMUM AND 0.416 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 1.109 INCHES MINIMUM AND 1.156 INCHES MAXIMUM |
| AASK | HEAD STYLE | FLAT COUNTERSUNK |
| AASL | HEAD DIAMETER | 0.469 INCHES MINIMUM AND 0.474 INCHES MAXIMUM |
| AAUR | GRIP DIAMETER | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM |
| ABQZ | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) |
| AHYM | NOMINAL THREAD DIAMETER | 0.312 INCHES |
| ANEE | GRIP LENGTH | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 24 |
| CQBC | MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| CQFM | HARDNESS RATING | 39.0 ROCKWELL C MINIMUM OVERALL AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| CRSQ | COUNTERSINK ANGLE | 99.5 DEGREES MINIMUM AND 100.5 DEGREES MAXIMUM |
| CSYM | SURFACE FINISH | 63.0 MICROINCHES GRIP |
| CSYM | SURFACE FINISH | 63.0 MICROINCHES THREADS |
| MATT | MATERIAL | STEEL COMP 4340 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 8740 OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNJF |
| ZZZK | SPECIFICATION/STANDARD DATA | 76823-51B581 MANUFACTURERS STANDARD |
| Relevant Components for NSN - 5305-00-338-2078, 5305003382078 | ||||
| 5365-00-981-3580 (5365009813580) | 5306-01-663-0372 (5306016630372) | 5330-00-259-1415 (5330002591415) | 5340-00-140-8006 (5340001408006) | |
| 5310-01-055-6080 (5310010556080) | 5340-01-571-9066 (5340015719066) | 5360-01-528-5575 (5360015285575) | 5340-01-254-4525 (5340012544525) | |
| 5310-01-456-0920 (5310014560920) | 5331-01-311-6975 (5331013116975) | 5330-00-147-6676 (5330001476676) | 5365-01-201-0770 (5365012010770) | |
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