The Valve,safety Relief, cataloged under National Stock Number 4820-01-094-0169, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-094-0169 |
| Primary Part Number | KT-3186-3 ITEM 7 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | GASKET SEAL(BOSS) ALL ENDS |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Bonnet Type | INSIDE SPRING |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Bonnet Attachment Method | INTEGRAL |
| Thread Class | 2B ALL ENDS |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UNF ALL ENDS |
| Opening Pressure Setting | 5100.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| KT-3186-3 ITEM 7 | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| KT-3186-20 | 5/9 Secondary reference The Entwistle Company Llc |
| KT-3186-3 ITEM 7 | 5/9 Secondary reference Entwistle Co the Kenett Hydraulic Systems Div |
| 53498-8BB | 5/9 Secondary reference Entwistle Co the Kenett Hydraulic Systems Div |
| 5349B-8BB | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 5349B-8BB-5100 | 3/2 Design control — primary reference U.S. Government activity |
| KT-3186-20 | 5/9 Secondary reference Entwistle Co the Kenett Hydraulic Systems Div |
NSN 4820-01-094-0169 is a Valve,safety Relief, manufactured by The Entwistle Company Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-094-0169 has 1 manufacturer part number on file: KT-3186-3 ITEM 7 (The Entwistle Company Llc).
Key specifications for KT-3186-3 ITEM 7: Flow Control Device: POPPET; Connection Style: GASKET SEAL(BOSS) ALL ENDS; Connection Type: THREADED INTERNAL BOSS ALL ENDS; Style Designator: STRAIGHT THRU. 14 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.