AS9120B, ISO 9001:2015, and FAA AC 0056B Accredited
| Item Name | Screw Cap Socket Head |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 00-121-7972 (001217972) |
| NCB Code | USA (00) |
| Manufacturer | Torkon Fastener Corp, Military Standards Corp, Federal Specifications, National Aerospace Standards Com |
| Part Number | Manufacturer | Item Name | RFQ |
|---|---|---|---|
| LK21295-63 | torkon fastener corp | screw cap socket head | RFQ |
| MS21295-63 | military standards corp | screw cap socket head | RFQ |
| FFS86 | federal specifications | screw cap socket head | RFQ |
| MS21295-63 | national aerospace standards com | screw cap socket head | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | 0.875 INCHES MINIMUM |
| AASB | FASTENER LENGTH | 1.235 INCHES MINIMUM AND 1.281 INCHES MAXIMUM |
| AASK | HEAD STYLE | FLAT CHAMFER |
| AASL | HEAD DIAMETER | 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM |
| AASU | HEAD HEIGHT | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| AAUM | LOCKING FEATURE | STRIP THREADS |
| ABQZ | INTERNAL DRIVE STYLE | HEXAGON |
| AHYM | NOMINAL THREAD DIAMETER | 0.190 INCHES |
| ASDB | WIDTH ACROSS FLATS | 0.156 INCHES MINIMUM AND 0.159 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| CQBC | MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| CQFM | HARDNESS RATING | 80.0 ROCKWELL B MINIMUM OVERALL |
| CQHQ | MINIMUM YIELD STRENGTH | 30000 POUNDS PER SQUARE INCH |
| CSYM | SURFACE FINISH | 63.0 MICROINCHES THREADS |
| MATT | MATERIAL | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | PASSIVATE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNF |
| ZZZT | NONDEFINITIVE SPEC/STD DATA | 6 TYPE |
| ZZZX | DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY SELF-LOCKING FEATURE |
| Relevant Components for NSN - 5305-00-121-7972, 5305001217972 | ||||
| 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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