The Holder,disk Valve, cataloged under National Stock Number 4820-01-304-0451, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-304-0451 |
| Primary Part Number | 4384536-31B1-07 |
| Item Name | Holder,disk Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Specification/standard Data | 81346-ASTM B164 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 81346-ASTM A494 GRADE -30C PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 4384536-31B1-07 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-4384536 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-304-0451 is a Holder,disk Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-304-0451 has 1 manufacturer part number on file: 4384536-31B1-07 (Naval Sea Systems Command).
Key specifications for 4384536-31B1-07: Specification/standard Data: 81346-ASTM B164 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 81346-ASTM A494 GRADE -30C PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Special Features: NICKEL COPPER ALLOY,0.844 IN. H; 0.937 IN. DIA ONE END,0.932 IN. DIA OTHER END IN; Part Name Assigned by Controlling Agency: DISC HOLDER (STOP); Material: NICKEL ALLOY. 2 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.