The Valve,safety Relief, cataloged under National Stock Number 4820-01-716-0657, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Johnson Controls Ltd, York Navy Systems. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-716-0657 |
| Primary Part Number | 226L79875-M00 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Johnson Controls Ltd, York Navy Systems |
| Status | ACTIVE |
| Nominal Length | 85.0 MILLIMETERS ALL ENDS MM |
| Bolt Hole Nominal Diameter | 6.35 MILLIMETERS FIRST END MM |
| 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 |
|---|---|
| 226L79875-M00 | Johnson Controls Ltd, York Navy Systems (GBR) |
| Reference | Meaning |
|---|---|
| 923 - 3/8" NPTF | 3/9 Design control — primary reference Henry Technologies, Inc. |
NSN 4820-01-716-0657 is a Valve,safety Relief, manufactured by Johnson Controls Ltd, York Navy Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-716-0657 has 1 manufacturer part number on file: 226L79875-M00 (Johnson Controls Ltd, York Navy Systems).
Key specifications for 226L79875-M00: Nominal Length: 85.0 MILLIMETERS ALL ENDS MM; Bolt Hole Nominal Diameter: 6.35 MILLIMETERS FIRST END MM; Special Features: 3/8 NPTF INLET; 1/2 SAE FLARE OUTLET; FLOW AREA 31.67 MM; WEIGHT 19 KG. KG; Part Name Assigned by Controlling Agency: 3-WAY 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.