The Disk,valve, cataloged under National Stock Number 4820-00-375-7855, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 7 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through both NSN and commercial part number lookups. 16 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-375-7855 |
| Primary Part Number | R6309HHPC3 P/N 85485 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Outside Diameter | 2.120 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Nominal Thread Size | 0.563 INCHES IN |
| Thread Class | 2B |
| Material | NICKEL ALLOY |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| R6309HHPC3 P/N 85485 PRIMARY | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| R6309LLPC3-1IN | 5/9 Secondary reference Ashcroft Inc Dba Heise |
| 5119-4824-3800PC3-85485 | 5/9 Secondary reference U.S. Government activity |
| 5119-4824-3800PC3-85485 | 5/9 Secondary reference Naval Sea Systems Command |
| 0085485 | 3/9 Design control — primary reference Ashcroft Inc Dba Heise |
| R6309TPC3-1IN | 5/9 Secondary reference Ashcroft Inc Dba Heise |
| 5119-4824-3805PC3-11N | 5/9 Secondary reference U.S. Government activity |
| 5119-4824-3803PC3-1IN | 5/9 Secondary reference Naval Sea Systems Command |
| 5119-4824-3805PC85485 | 5/9 Secondary reference Naval Sea Systems Command |
| 5119-4824-3805PC85485 | 5/9 Secondary reference U.S. Government activity |
| 5119-4824-3801PC3-1IN | 5/9 Secondary reference Naval Sea Systems Command |
| R6309HHPC3-1IN | 5/9 Secondary reference Ashcroft Inc Dba Heise |
| R6309S3-85485 | 5/9 Secondary reference Ashcroft Inc Dba Heise |
| R6309TPC85485 | 5/9 Secondary reference Ashcroft Inc Dba Heise |
| 5119-4824-3803PC3-1IN | 5/9 Secondary reference U.S. Government activity |
| 5119-4824-3801PC3-1IN | 5/9 Secondary reference U.S. Government activity |
| 5119-4824-3805PC3-11N | 5/9 Secondary reference Naval Sea Systems Command |
NSN 4820-00-375-7855 is a Disk,valve, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-375-7855 has 1 manufacturer part number on file: R6309HHPC3 P/N 85485 (Ashcroft Inc Dba Heise).
Key specifications for R6309HHPC3 P/N 85485: Overall Height: 0.750 INCHES NOMINAL IN; Outside Diameter: 2.120 INCHES NOMINAL IN; Style Designator: PLUG; Seat Angle: 45.0 DEGREES NOMINAL. 7 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.