The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-438-5811, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 — Screws (FSG 53) |
| Manufacturers | Amz Alabama Inc. (CAGE 076M6); The American Society of Mechanical Engineers (CAGE 05047); Bae Systems Land & Armaments L.p. (CAGE 54786) |
| Parameter | Value |
|---|---|
| NSN | 5305-01-438-5811 |
| Primary Part Number | B1831BH040020N |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| 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 |
|---|---|
| 6430340-19M1 | Amz Alabama Inc. (USA) |
| B1831BH040020N PRIMARY | The American Society of Mechanical Engineers (USA) |
| 6430340-19M1 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| B1831BH040020N | 5/2 Secondary reference U.S. Government activity |
| 6430340-19M1 | 3/9 Design control — primary reference Bae Systems Survivability Systems Llc |
| 6430340 | D/9 Drawing number reference only Bae Systems Survivability Systems Llc |
NSN 5305-01-438-5811 is a Screw,cap,socket Head, manufactured by The American Society of Mechanical Engineers, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-438-5811 has 3 manufacturer part numbers on file: 6430340-19M1 (Amz Alabama Inc.), B1831BH040020N (The American Society of Mechanical Engineers), 6430340-19M1 (Bae Systems Land & Armaments L.p.).
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-595-7211, 5305-01-598-5960. Verify interchangeability with system specifications before substitution.
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.