The Valve,safety Relief, cataloged under National Stock Number 4820-01-631-9405, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Versuchs-Anstalt. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-631-9405 |
| Primary Part Number | NMM220680 REV C FIND NO. 3 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Versuchs-Anstalt |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Connection Style | GASKET SEAL(BOSS) ALL ENDS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | ANGLE |
| Nominal Outside Diameter Tube Accommodated | 1.44 INCHES ALL ENDS IN |
| Operating Pressure | 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 0.500 INCHES IN |
| Bonnet Type | PACKING RETAINING |
| Material | STEEL STAINLESS - USE STB000 BODY |
| 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 |
|---|---|
| NMM220680 REV C FIND NO. 3 | Versuchs-Anstalt |
| NMM000101-32 | Versuchs-Anstalt |
| Reference | Meaning |
|---|---|
| SVSS-3066RV/SS/XS | 3/9 Design control — primary reference Ruthman Pump and Engineering Inc Dba Fulflo Specialties Co Div Fulflo Specialties Co. |
NSN 4820-01-631-9405 is a Valve,safety Relief, manufactured by Versuchs-Anstalt, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-631-9405 has 2 manufacturer part numbers on file: NMM220680 REV C FIND NO. 3 (Versuchs-Anstalt), NMM000101-32 (Versuchs-Anstalt).
Key specifications for NMM220680 REV C FIND NO. 3: Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN; Connection Style: GASKET SEAL(BOSS) ALL ENDS; Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS; Style Designator: ANGLE. 10 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.