The Valve,safety Relief, cataloged under National Stock Number 4820-00-133-0768, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dressta North America Ltd. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-133-0768 |
| Primary Part Number | 215321H1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dressta North America Ltd |
| Status | ACTIVE |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Material | ZINC BODY |
| Thread Series Designator | NPT ALL ENDS |
| 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 |
|---|---|
| 215321H1 PRIMARY | Dressta North America Ltd (USA) |
| 215321H1 | Komatsu America Corp. (USA) |
| Reference | Meaning |
|---|---|
| 215321H1 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| AC-36709 | 5/9 Secondary reference Lift Parts Mfg Co Inc Div of Echlin Mfg Co the |
| 215321H1 | 5/9 Secondary reference U.S. Government activity |
| AC-36709 | 5/9 Secondary reference Federal Mogul Corp Sub Wagner Brake Moog Automotive Div |
| 215321H1 | 5/9 Secondary reference Komatsu American Intl Co |
NSN 4820-00-133-0768 is a Valve,safety Relief, manufactured by Dressta North America Ltd, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-133-0768 has 2 manufacturer part numbers on file: 215321H1 (Dressta North America Ltd), 215321H1 (Komatsu America Corp.).
Key specifications for 215321H1: Nominal Thread Size: 0.250 INCHES ALL ENDS IN; Material: ZINC BODY; Thread Series Designator: NPT ALL ENDS. 3 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.