The Liner,check Valve, cataloged under National Stock Number 4820-00-191-9061, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-191-9061 |
| Primary Part Number | 668158 |
| Item Name | Liner,check Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| General Characteristics Item Description | STAINLESS STEEL AMS5613; TEMPER AT 525 DEG F TO PRODUCE HARDNESS OF ROCKWELL C35-4O OR EQUIV; 0.851 IN. MIN 0.857 IN. MAX INSIDE DIA 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 |
|---|---|
| 668158 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 668158 | 3/9 Design control — primary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 4820-00-191-9061 is a Liner,check Valve, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-191-9061 has 1 manufacturer part number on file: 668158 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 668158: General Characteristics Item Description: STAINLESS STEEL AMS5613; TEMPER AT 525 DEG F TO PRODUCE HARDNESS OF ROCKWELL C35-4O OR EQUIV; 0.851 IN. MIN 0.857 IN. MAX INSIDE DIA IN. 1 specification is 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.