The Valve,safety Relief, cataloged under National Stock Number 4820-01-421-9651, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-9651 |
| Primary Part Number | 3810748007 ITEM 2 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| Opening Pressure Setting | 0.5 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 |
|---|---|
| 3810748007 ITEM 2 PRIMARY | Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc (USA) |
| 2613426000 | Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 3810748007 | D/9 Drawing number reference only Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc |
| 1420B00V-0.5S | 5/9 Secondary reference Bivco Valve Co |
NSN 4820-01-421-9651 is a Valve,safety Relief, manufactured by Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-9651 has 2 manufacturer part numbers on file: 3810748007 ITEM 2 (Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc), 2613426000 (Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc).
Key specifications for 3810748007 ITEM 2: Style Designator: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.; End Item Identification: 170' PATROL COASTAL; Opening Pressure Setting: 0.5 POUNDS PER SQUARE INCH LBS; Valve Operation Method: AUTOMATIC. 3 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.