The Screw Assembly,panel, cataloged under National Stock Number 5305-01-177-9742, 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 26 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-177-9742 |
| Primary Part Number | CA28027B-8HS |
| 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 |
| Surface Treatment Document and Classification | MIL-C-13924 CL3 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Surface Treatment Document and Classification | MIL-C-13924 CL3 MIL SPEC SINGLE TREATMENT RESPONSE SPRING |
| Surface Treatment Document and Classification | MIL-C-13924 CL3 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| Thread Length | 0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE SPRING |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE STAND-OFF |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | OXIDE FASTENER |
| Surface Treatment | OXIDE STAND-OFF |
| Surface Treatment | OXIDE SPRING |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 302 SPRING |
| Material | STEEL COMP 303SE OR STEEL COMP 303 FASTENER |
| Material | STEEL COMP 303SE OR STEEL COMP 303 PRIMARY WASHER |
| Material | STEEL COMP 303SE OR STEEL COMP 303 SECONDARY WASHER |
| Material | STEEL COMP 303SE OR STEEL COMP 303 STAND-OFF |
| Thread Series Designator | UNF |
| Head Diameter | 0.310 INCHES NOMINAL 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 |
|---|---|
| CA28027B-8HS | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| 13084231 | 5/9 Secondary reference Lockheed Martin Corporation |
| 13084231 | 3/9 Design control — primary reference Program Manager Advanced Attack Helicopter Barcom Amcpm-Aah |
NSN 5305-01-177-9742 is a Screw Assembly,panel, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-177-9742 has 1 manufacturer part number on file: CA28027B-8HS (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for CA28027B-8HS: Width Across Flats: 0.156 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-13924 CL3 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER; Surface Treatment Document and Classification: MIL-C-13924 CL3 MIL SPEC SINGLE TREATMENT RESPONSE SPRING; Surface Treatment Document and Classification: MIL-C-13924 CL3 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF. 26 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.