The Screw Assembly,panel, cataloged under National Stock Number 5305-01-420-7643, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Div Tridair Products. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-420-7643 |
| Primary Part Number | CA28106C06-6HS |
| Item Name | Screw Assembly,panel |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc. Div Tridair Products |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES NOMINAL IN |
| Fastener Length | 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | ASTM A313 ASSN STD SINGLE MATERIAL RESPONSE SPRING |
| Material Document and Classification | ASTM A484 SERIES 300 ASSN STD SINGLE MATERIAL RESPONSE STAND-OFF |
| Material Document and Classification | MIL-S-5059 COND A MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| Material Document and Classification | QQ-S-763 SERIES 300 FED SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Features Provided | FLAT WASHER AND LOCK WASHER |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 302 SPRING |
| Material | STEEL CORROSION RESISTING STAND-OFF |
| Material | IRON ALLOY 660 FASTENER |
| Material | STEEL COMP 302 SECONDARY WASHER |
| Material | STEEL CORROSION RESISTING PRIMARY WASHER |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.280 INCHES MINIMUM AND 0.320 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 |
| Part Number | Manufacturer |
|---|---|
| CA28106C06-6HS PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| 11200170-1 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 5305-01-420-7643 is a Screw Assembly,panel, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-420-7643 has 1 manufacturer part number on file: CA28106C06-6HS (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for CA28106C06-6HS: Width Across Flats: 0.156 INCHES NOMINAL IN; Fastener Length: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN. 24 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.