The Retainer,disk,valve, cataloged under National Stock Number 4820-01-540-6694, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-540-6694 |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Outside Diameter | 0.281 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-281, CLASS A OR B FED SPEC SINGLE MATERIAL RESPONSE OR ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A494, GRADE -30C ASSN STD SINGLE MATERIAL RESPONSE |
| Valve Size for Which Designed | 0.250 INCHES IN |
| Valve Design Control Activity | 80064 |
| Material | NICKEL ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 803-2177934-X1XX-14 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-540-6694 is a Retainer,disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-540-6694: Outside Diameter: 0.281 INCHES NOMINAL IN; Material Document and Classification: QQ-N-281, CLASS A OR B FED SPEC SINGLE MATERIAL RESPONSE OR ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A494, GRADE -30C ASSN STD SINGLE MATERIAL RESPONSE; Valve Size for Which Designed: 0.250 INCHES IN; Special Features: DISC RETAINER FOR 0.250 INCH STOP CHECK AND LIFT CHECK VALVES IN. 5 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.