The Disk,valve, cataloged under National Stock Number 4820-00-036-2010, 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 10 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. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-036-2010 |
| Primary Part Number | 78958 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Shoulder Width | 0.250 INCHES NOMINAL IN |
| Shoulder Height | 0.275 INCHES NOMINAL IN |
| Outside Diameter | 1.170 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Nominal Thread Size | 0.875 INCHES IN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 18 |
| Material | COPPER ALLOY |
| Thread Series Designator | UNS |
| 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 |
|---|---|
| 78958 PRIMARY | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-036-2010 is a Disk,valve, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-036-2010 has 1 manufacturer part number on file: 78958 (Ashcroft Inc Dba Heise).
4 possible matches (shared part number, not a government interchangeability claim): 2520-00-080-6993, 5815-00-391-9815, 2915-00-647-1704. Verify interchangeability with system specifications before substitution.
Key specifications for 78958: Overall Height: 1.200 INCHES NOMINAL IN; Shoulder Width: 0.250 INCHES NOMINAL IN; Shoulder Height: 0.275 INCHES NOMINAL IN; Outside Diameter: 1.170 INCHES NOMINAL IN. 10 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.