The Valve,safety Relief, cataloged under National Stock Number 4820-01-137-8117, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Pti Technologies Inc.. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Pti Technologies Inc. (CAGE 05228) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-137-8117 |
| Primary Part Number | 6667581 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Pti Technologies Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 6667581 PRIMARY | Pti Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 6667581 | 5/9 Secondary reference Arvinmeritor Inc |
| 844220 | C/1 Advisory reference — outside the item-of-supply concept Eaton Aerospace, Llc Dba Jackson South |
NSN 4820-01-137-8117 is a Valve,safety Relief, manufactured by Pti Technologies Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-137-8117 has 1 manufacturer part number on file: 6667581 (Pti Technologies Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-201-4657. Verify interchangeability with system specifications before substitution.
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.