The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-099-6642, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Essex Industries, Inc. Dba Essex Industries. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-099-6642 |
| Primary Part Number | 50C-0014-0025 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Essex Industries, Inc. Dba Essex Industries |
| Status | ACTIVE |
| Flow Control Device | STEM AND INTEGRAL DISK |
| First End Thread Direction | RIGHT-HAND |
| Temp Rating | 165.0 FAHRENHEIT DEGF |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| Second End Nominal Pipe Size Accommodated | 0.250 INCHES IN |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Second End Style Designator | INVERTED FLARE |
| First End Connection Type | THREADED INTERNAL PIPE |
| Temp Adjustability | NOT ADJUSTABLE |
| First End Nominal Pipe Size Accommodated | 0.500 INCHES IN |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | NITROGEN, LIQUID AND OXYGEN, GASEOUS AND OXYGEN, LIQUID |
| Second End Connection Type | THREADED EXTERNAL PIPE |
| 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 |
|---|---|
| 50C-0014-0025 PRIMARY | Essex Industries, Inc. Dba Essex Industries (USA) |
| Reference | Meaning |
|---|---|
| CRV-250B-K-75 | 5/9 Secondary reference U.S. Government activity |
| PRV9432N075 | 5/9 Secondary reference Rego Co a Marmon Group Co |
| PRV9432N075 | 5/9 Secondary reference Engineered Controls International, Llc |
| B-9422N | 5/9 Secondary reference Rego Co a Marmon Group Co |
| PRV9432 | 3/9 Design control — primary reference Rego Co a Marmon Group Co |
NSN 4820-01-099-6642 is a Valve,relief,pressure and Temper, manufactured by Essex Industries, Inc. Dba Essex Industries, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-099-6642 has 1 manufacturer part number on file: 50C-0014-0025 (Essex Industries, Inc. Dba Essex Industries).
Key specifications for 50C-0014-0025: Flow Control Device: STEM AND INTEGRAL DISK; First End Thread Direction: RIGHT-HAND; Temp Rating: 165.0 FAHRENHEIT DEGF; Second End Relationship with First End: NOT IDENTICAL. 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.