Disk, Valve 4820-00-036-1971 NSN 4820-00-036-1971 · NIIN 000361971 · Part number 84866
Ashcroft Inc Dba Heise · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 38056
NSN 4820-00-036-1971 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-036-1971. Manufacturer of record part number: 84866 .
Also searched as
4820-00-036-1971 ·
4820000361971 ·
NIIN 000361971 ·
00-036-1971 ·
FSC 4820 Valves, Nonpowered · CAGE 38056 · 84866
Nearby stock numbers
← 4820-00-036-1970 Disk, Valve
·
4820-00-036-1972 Disk, Valve →
4820-00-036-1971 — Valves, Nonpowered
Features
Disk,valve — FSC 4820 Shoulder Width: 0.348 INCHES NOMINAL IN Shoulder Height: 0.408 INCHES NOMINAL IN Outside Diameter: 1.450 INCHES NOMINAL IN Style Designator: PLUG Seat Angle: 45.0 DEGREES NOMINAL Nominal Thread Size: 0.875 INCHES IN Thread Class: 2B
Identification
NSN: 4820-00-036-1971
NIIN: 000361971
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 84866
Manufacturer: Ashcroft Inc Dba Heise
General Description
The Disk,valve, cataloged under National Stock Number 4820-00-036-1971, 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 9 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. Current acquisition status: Active.
Technical Specifications
Parameter Value NSN 4820-00-036-1971 Primary Part Number 84866 Item Name Disk,valve FSC / FSG 4820 / 48 — Valves, Nonpowered Manufacturer Ashcroft Inc Dba Heise Status ACTIVE Shoulder Width 0.348 INCHES NOMINAL IN Shoulder Height 0.408 INCHES NOMINAL IN Outside Diameter 1.450 INCHES NOMINAL IN Style Designator PLUG Seat Angle 45.0 DEGREES NOMINAL Nominal Thread Size 0.875 INCHES IN Thread Class 2B Material NICKEL ALLOY Thread Series Designator UNEF
Lifecycle & Compliance
Acquisition Status ACTIVE DEMIL Code DEMIL A — No Demilitarization Required Hazard No hazard code in the DLA record (HMIC N) Criticality Code X
Cross-Reference Index
Part Number Manufacturer
84866 PRIMARY Ashcroft Inc Dba Heise (USA)
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-00-036-1971?
NSN 4820-00-036-1971 is a Disk,valve, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-036-1971?
NSN 4820-00-036-1971 has 1 manufacturer part number on file: 84866 (Ashcroft Inc Dba Heise).
What are the specifications of 84866?
Key specifications for 84866: Overall Height: 1.618 INCHES NOMINAL IN; Shoulder Width: 0.348 INCHES NOMINAL IN; Shoulder Height: 0.408 INCHES NOMINAL IN; Outside Diameter: 1.450 INCHES NOMINAL IN. 9 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-036-1971 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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