The Valve,safety Relief, cataloged under National Stock Number 4820-01-429-9655, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Heishin Engineering & Equipment Co. Ltd. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-429-9655 |
| Primary Part Number | HK-62921-25A |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Heishin Engineering & Equipment Co. Ltd |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 CAP |
| Style Designator | ANGLE |
| Bonnet Type | INSIDE SPRING |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | BOLTED |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| HK-62921-25A PRIMARY | Heishin Engineering & Equipment Co. Ltd (JPN) |
| Reference | Meaning |
|---|---|
| HK-62921-25A | 3/9 Design control — primary reference Heishin Engineering & Equipment Co.ltd |
NSN 4820-01-429-9655 is a Valve,safety Relief, manufactured by Heishin Engineering & Equipment Co. Ltd, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-429-9655 has 1 manufacturer part number on file: HK-62921-25A (Heishin Engineering & Equipment Co. Ltd).
Key specifications for HK-62921-25A: Furnished Items and Quantity: 1 CAP; Style Designator: ANGLE; Bonnet Type: INSIDE SPRING; Disk Loading Method: SPRING. 6 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.