The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-050-6478, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 19 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-050-6478 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.214 INCHES MINIMUM AND 0.307 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1189 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PATCH THREADS |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNJC |
| Head Diameter | 0.270 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| NAS1189E08P6H | 5/9 Secondary reference U.S. Government activity |
| PL600412 ITEM 2 | C/1 Advisory reference — outside the item-of-supply concept Global Associates Ltd Signal Processing Systems |
| NAS1189E08P6H | 5/9 Secondary reference Plastic and Metal Products Corporation |
| NAS1189E08P6H | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1189E08P6H | 5/9 Secondary reference U.S. Government activity |
| NAS1189E08P6H | 5/9 Secondary reference Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc |
| NAS1189E08P6H | 3/2 Design control — primary reference U.S. Government activity |
| NAS1189E08P6H | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1189E08P6H | 5/9 Secondary reference Fastener Innovation Technology, Inc. Dba F I T |
| NAS1189E08P6H | 5/9 Secondary reference Nd Industries Inc Div Eastern Division |
| NAS1189E08P6HB | C/1 Advisory reference — outside the item-of-supply concept Global Associates Ltd Signal Processing Systems |
| NAS1189E08P6H | 5/9 Secondary reference Nor-Cal Supply Co |
| NAS1189E08P6H | 5/9 Secondary reference Long-Lok Llc |
| NAS1189E08P6H | 5/9 Secondary reference Air Industries Co Inc |
| NAS1189E08P6HB | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| NAS1189E08P6H | 5/9 Secondary reference U.S. Government activity |
| NAS1189C08P6H | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| NAS1189E08P6H | 5/9 Secondary reference Hi-Shear Corporation |
| NAS1189E08P6H | 5/9 Secondary reference Apcom Inc |
NSN 5305-01-050-6478 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-050-6478: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 19 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.