The Retainer,disk,valve, cataloged under National Stock Number 4820-01-201-6750, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Johnson Controls Inc Control Products Div. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-201-6750 |
| Primary Part Number | RTR56-1 |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Johnson Controls Inc Control Products Div |
| Status | ACTIVE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| RTR56-1 PRIMARY | Johnson Controls Inc Control Products Div (USA) |
| PLR-V43-6 ITEM 38 | Johnson Controls Inc Control Products Div (USA) |
| Reference | Meaning |
|---|---|
| PLR-V43-6 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-201-6750 is a Retainer,disk,valve, manufactured by Johnson Controls Inc Control Products Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-201-6750 has 2 manufacturer part numbers on file: RTR56-1 (Johnson Controls Inc Control Products Div), PLR-V43-6 ITEM 38 (Johnson Controls Inc Control Products Div).
Key specifications for RTR56-1: Material: NICKEL ALLOY. 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.