The Valve,safety Relief, cataloged under National Stock Number 4820-01-339-8491, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Betts Industries, Inc.. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-339-8491 |
| Primary Part Number | EV46630SSTS-004 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Betts Industries, Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Valve Size | 4.000 INCHES IN |
| Material | STEEL COMP 316 BODY |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE FLOW CONTROL DEVICE |
| 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 |
|---|---|
| EV46630SSTS-004 | Barlo Equipment Corp (USA) |
| EV46630SSTS-004 PRIMARY | Betts Industries, Inc. (USA) |
| 11668101-2 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 11668101 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
| SSE1114001 | 5/9 Secondary reference Allegheny Valve Co |
NSN 4820-01-339-8491 is a Valve,safety Relief, manufactured by Betts Industries, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-339-8491 has 3 manufacturer part numbers on file: EV46630SSTS-004 (Barlo Equipment Corp), EV46630SSTS-004 (Betts Industries, Inc.), 11668101-2 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for EV46630SSTS-004: Flow Control Device: DISK; Valve Size: 4.000 INCHES IN; End Item Identification: 2330-01-330-2779; Material: STEEL COMP 316 BODY. 4 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.