The Valve,safety Relief, cataloged under National Stock Number 4820-01-681-3576, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is North American Controls Inc Dba North American Controls Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-681-3576 |
| Primary Part Number | 12334-1SP |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | North American Controls Inc Dba North American Controls Inc |
| Status | ACTIVE |
| Nominal Length | 4.23 INCHES ALL ENDS IN |
| Style Designator | SCREW-IN CARTRIDGE |
| 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 |
|---|---|
| 12334-1SP PRIMARY | North American Controls Inc Dba North American Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| 12334SP | D/9 Drawing number reference only North American Controls Inc Dba North American Controls Inc |
NSN 4820-01-681-3576 is a Valve,safety Relief, manufactured by North American Controls Inc Dba North American Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-681-3576 has 1 manufacturer part number on file: 12334-1SP (North American Controls Inc Dba North American Controls Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-681-3582. Verify interchangeability with system specifications before substitution.
Key specifications for 12334-1SP: Nominal Length: 4.23 INCHES ALL ENDS IN; Style Designator: SCREW-IN CARTRIDGE; Special Features: PRESSURE SETTING: 3,600-3,650; Part Name Assigned by Controlling Agency: PRESSURE RED./REL. VALVE. 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.