The Valve,safety Relief, cataloged under National Stock Number 4820-01-291-2365, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Autoflow Products Co. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-291-2365 |
| Primary Part Number | 288200-1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Autoflow Products Co |
| Status | ACTIVE |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| 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 |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Thread Series Designator | NPT ALL ENDS |
| 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 | N |
| Part Number | Manufacturer |
|---|---|
| 288200-1 PRIMARY | Autoflow Products Co (USA) |
| Reference | Meaning |
|---|---|
| 19079-1 | 5/9 Secondary reference U.S. Government activity |
| 19079-1 | C/1 Advisory reference — outside the item-of-supply concept Drs Environmental Systems Inc |
| 5-45-5165 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 4820-01-291-2365 is a Valve,safety Relief, manufactured by Autoflow Products Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-291-2365 has 1 manufacturer part number on file: 288200-1 (Autoflow Products Co).
3 possible matches (shared part number, not a government interchangeability claim): 4320-01-416-6849, 2590-01-487-4723, 5895-01-585-2796. Verify interchangeability with system specifications before substitution.
Key specifications for 288200-1: Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: ANGLE; Thread Direction: RIGHT-HAND ALL ENDS. 9 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.