NSN 4820-00-451-0270 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-451-0270. Manufacturer of record part number: 317500.
The Disk,valve, cataloged under National Stock Number 4820-00-451-0270, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Walker Mfg Co. Government technical data includes 2 specifications, 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-451-0270
Primary Part Number
317500
Item Name
Disk,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Walker Mfg Co
Status
ACTIVE
Outside Diameter
1.125 INCHES NOMINAL IN
Material
STEEL
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
⇄Related Items2
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5905-00-725-25450730-0024POSSIBLE MATCH
RESISTOR,FIXED,FILM
Possible match (shared part number)Keysight Technologies Inc
4820-00-770-49623175-00POSSIBLE MATCH
VALVE,CHECK
Possible match (shared part number)Dukes Aerospace, Inc.
NSN 4820-00-451-0270 is a Disk,valve, manufactured by Walker Mfg Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-451-0270?
NSN 4820-00-451-0270 has 2 manufacturer part numbers on file: 317500 (Walker Mfg Co), A21090 (Cnh Industrial America Llc Dba Cnh America).
What NSN replaces 4820-00-451-0270?
2 possible matches (shared part number, not a government interchangeability claim): 5905-00-725-2545, 4820-00-770-4962. Verify interchangeability with system specifications before substitution.
What are the specifications of 317500?
Key specifications for 317500: Overall Height: 0.500 INCHES NOMINAL IN; Outside Diameter: 1.125 INCHES NOMINAL IN; Material: STEEL. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-451-0270 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.