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| Item Name | Screw Cap Socket Head |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5305 Screws |
| National Item Identification Number (NIIN) | 01-137-8936 (011378936) |
| NCB Code | USA (01) |
| Manufacturer | National Aerospace Standards Com |
| Part Number | Manufacturer | Item Name | RFQ |
|---|---|---|---|
| NAS1221-6E4L | national aerospace standards com | screw cap socket head | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| AHYM | Nominal Thread Diameter | 0.375 INCHES |
| AASK | Head Style | FLAT COUNTERSUNK |
| CMLP | Thread Quantity Per Inch | 24 |
| SFTT | Surface Treatment | PASSIVATE OVERALL |
| THSD | Thread Series Designator | UNJF |
| AASB | Fastener Length | 0.814 INCHES MINIMUM AND 0.844 INCHES MAXIMUM |
| ABQZ | Internal Drive Style | HIGH-TORQUE |
| MDCL | Material Document And Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| AAJF | Thread Direction | RIGHT-HAND |
| AASA | Thread Length | 0.554 INCHES MINIMUM AND 0.604 INCHES MAXIMUM |
| AASL | Head Diameter | 0.703 INCHES MINIMUM AND 0.762 INCHES MAXIMUM |
| CSYM | Surface Finish | 32.0 MICROINCHES THREADS |
| AAUM | Locking Feature | PATCH THREADS |
| ZZZK | Specification/Standard Data | 80205-NAS1221 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| MATT | Material | IRON ALLOY 660 OVERALL |
| AAJD | Thread Class | 3A |
| MRC | Decoded Requirement | Clear Text Reply |
| CSYM | Surface Finish | 32.0 MICROINCHES GRIP |
| CQBC | Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH |
| CRSQ | Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| STDC | Surface Treatment Document And Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Relevant Components for NSN - 5305-01-137-8936, 5305011378936 | ||||
| 5305-00-151-0390 (5305001510390) | 5305-00-162-0212 (5305001620212) | 5330-01-021-6193 (5330010216193) | 5306-01-667-2305 (5306016672305) | |
| 5305-00-702-7578 (5305007027578) | 5306-01-467-0619 (5306014670619) | 5340-14-507-0973 (5340145070973) | 5330-01-545-5049 (5330015455049) | |
| 5331-01-433-9967 (5331014339967) | 5330-01-176-0563 (5330011760563) | 5330-20-001-0516 (5330200010516) | 5305-00-550-9932 (5305005509932) | |
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