The Valve,safety Relief, cataloged under National Stock Number 4820-01-307-0111, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is L3harris Technologies Integrated Systems L.p. Div Integrated Aerospace Systems. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-307-0111 |
| Primary Part Number | BH000026-001 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | L3harris Technologies Integrated Systems L.p. Div Integrated Aerospace Systems |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | GASKET SEAL(BOSS) ALL ENDS |
| Nominal Length | 2.960 INCHES ALL ENDS IN |
| Minimum Operating Temp | -65.0 FAHRENHEIT DEGF |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 1.322 INCHES ALL ENDS IN |
| Media for Which Designed | OXYGEN, GASEOUS THIRD RESPONSE |
| Media for Which Designed | HELIUM SECOND RESPONSE |
| Media for Which Designed | AIR FIRST RESPONSE |
| Thread Class | 3B ALL ENDS |
| Thread Series Designator | UNF ALL ENDS |
| Opening Pressure Setting | 24.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| BH000026-001 | L3harris Technologies Integrated Systems L.p. Div Integrated Aerospace Systems (USA) |
| S10164-1 | L3harris Technologies Integrated Systems L.p. Dba L3harris Technologies (USA) |
| Reference | Meaning |
|---|---|
| 2391244-9-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-307-0111 is a Valve,safety Relief, manufactured by L3harris Technologies Integrated Systems L.p. Div Integrated Aerospace Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-307-0111 has 2 manufacturer part numbers on file: BH000026-001 (L3harris Technologies Integrated Systems L.p. Div Integrated Aerospace Systems), S10164-1 (L3harris Technologies Integrated Systems L.p. Dba L3harris Technologies).
Key specifications for BH000026-001: Flow Control Device: DISK; Connection Style: GASKET SEAL(BOSS) ALL ENDS; Nominal Length: 2.960 INCHES ALL ENDS IN; Minimum Operating Temp: -65.0 FAHRENHEIT DEGF. 17 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.