The Valve,safety Relief, cataloged under National Stock Number 4820-01-486-6321, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Industries /canada/ Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-486-6321 |
| Primary Part Number | 230-048 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Industries /canada/ Inc |
| Status | ACTIVE |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| 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 |
|---|---|
| 230-048 | Watts Industries /canada/ Inc (CAN) |
| Reference | Meaning |
|---|---|
| 230-155 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-01-486-6321 is a Valve,safety Relief, manufactured by Watts Industries /canada/ Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-486-6321 has 1 manufacturer part number on file: 230-048 (Watts Industries /canada/ Inc).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-667-8444. Verify interchangeability with system specifications before substitution.
Key specifications for 230-048: Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: ANGLE; Thread Direction: RIGHT-HAND ALL ENDS; Nominal Thread Size: 0.500 INCHES ALL ENDS IN. 5 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.