The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-161-0907, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-161-0907 |
| Primary Part Number | N240X |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Flow Control Device | DISK, FLAT |
| First End Thread Series Designator | NPT |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 210.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | IDENTICAL |
| Body Style | ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| Temp Control Device Type | THERMOSTATIC |
| First End Connection Type | THREADED INTERNAL PIPE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Nominal Pipe Size Accommodated | 1.000 INCHES IN |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | WATER, FRESH |
| First End Nominal Thread Size | 1.000 INCHES IN |
| Adjustable Pressure Range | 75.0 TO 160.0 CAMERA MOUNT |
| 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 |
|---|---|
| N240X PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| N240X-M2 | 5/9 Secondary reference Watts Regulator Company |
| 6461-150 | 5/2 Secondary reference U.S. Government activity |
| 121755 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-161-0907 is a Valve,relief,pressure and Temper, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-161-0907 has 1 manufacturer part number on file: N240X (Watts Regulator Company).
2 possible matches (shared part number, not a government interchangeability claim): 4720-01-614-6473, 4820-01-660-0091. Verify interchangeability with system specifications before substitution.
Key specifications for N240X: Flow Control Device: DISK, FLAT; First End Thread Series Designator: NPT; First End Thread Direction: RIGHT-HAND; Temp Rating: 210.0 FAHRENHEIT DEGF. 16 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.