The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-204-5033, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Neptune Chemical Pump Co Div of R a Industries Inc. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-204-5033 |
| Primary Part Number | RV-316-1 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Neptune Chemical Pump Co Div of R a Industries Inc |
| Status | ACTIVE |
| Flow Control Device | BALL |
| First End Thread Series Designator | NPT |
| First End Thread Direction | RIGHT-HAND |
| Second End Nominal Thread Size | 0.50 INCHES IN |
| Second End Relationship with First End | NOT IDENTICAL |
| Body Style | ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS |
| First End Style Designator | PLAIN |
| Second End Thread Series Designator | NPT |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| First End Connection Type | THREADED INTERNAL PIPE |
| First End Outside Diameter Tube Accommodated | 0.50 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING BODY |
| Second End Connection Type | THREADED EXTERNAL PIPE |
| First End Nominal Thread Size | 0.50 INCHES IN |
| Second End Outside Diameter Tube Accommodated | 0.50 INCHES NOMINAL IN |
| 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 |
|---|---|
| RV-316-1 | Neptune Chemical Pump Co Div of R a Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 5027K51 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
| 5027K41 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
| 4SE00249-1 | 5/9 Secondary reference Naval Air Warfare Center Aircraft Division Code 1.3.1 Bldg 562-1 |
| 4SE01249-1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 4SE00249-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-204-5033 is a Valve,relief,pressure and Temper, manufactured by Neptune Chemical Pump Co Div of R a Industries Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-204-5033 has 1 manufacturer part number on file: RV-316-1 (Neptune Chemical Pump Co Div of R a Industries Inc).
Key specifications for RV-316-1: Flow Control Device: BALL; First End Thread Series Designator: NPT; First End Thread Direction: RIGHT-HAND; Second End Nominal Thread Size: 0.50 INCHES IN. 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.