NSN 4820-00-405-1809 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-405-1809. Manufacturer of record part number: 501-43.
Also searched as4820-00-405-1809 ·
4820004051809 ·
NIIN 004051809 ·
00-405-1809 ·
FSC 4820 Valves, Nonpowered · CAGE 28353 · 501-43
Material: RUBBER CHLOROPRENE CLASS CR AND PLASTIC POLYAMIDE NYLON
1 manufacturer part number on file
Manufacturer of record: Zurn Industries Inc Wilkins Regulator Co Div
Identification
NSN: 4820-00-405-1809
NIIN: 004051809
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 501-43
Manufacturer: Zurn Industries Inc Wilkins Regulator Co Div
General Description
The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-405-1809, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Zurn Industries Inc Wilkins Regulator Co Div. Government technical data includes 1 specification, 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. 5 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
4820-00-405-1809
Primary Part Number
501-43
Item Name
Diaphragm,valve,flat
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Zurn Industries Inc Wilkins Regulator Co Div
Status
ACTIVE
Material
RUBBER CHLOROPRENE CLASS CR AND PLASTIC POLYAMIDE NYLON
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 Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5930-01-048-7549POSSIBLE MATCH
SWITCH SECTION,ROTARY
Possible match (shared part number)
5999-01-157-4703POSSIBLE MATCH
HEAT SINK,ELECTRICAL-ELECTRONIC
Possible match (shared part number)
3120-01-239-718250143POSSIBLE MATCH
BEARING,WASHER,THRUST
Possible match (shared part number)Ingersoll-Rand Co Material Handling Div
5360-01-549-438950143POSSIBLE MATCH
SPRING,HELICAL,COMPRESSION
Possible match (shared part number)American Apex Corporation
9905-01-623-374350-143POSSIBLE MATCH
PLATE,IDENTIFICATION
Possible match (shared part number)Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)
Zurn Industries Inc Wilkins Regulator Co Div (USA)
Related Parts
5930-01-048-7549POSSIBLE MATCH
SWITCH SECTION,ROTARY
5999-01-157-4703POSSIBLE MATCH
HEAT SINK,ELECTRICAL-ELECTRONIC
3120-01-239-7182POSSIBLE MATCH
BEARING,WASHER,THRUST
50143
5360-01-549-4389POSSIBLE MATCH
SPRING,HELICAL,COMPRESSION
50143
9905-01-623-3743POSSIBLE MATCH
PLATE,IDENTIFICATION
50-143
Frequently Asked Questions
What is NSN 4820-00-405-1809?
NSN 4820-00-405-1809 is a Diaphragm,valve,flat, manufactured by Zurn Industries Inc Wilkins Regulator Co Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-405-1809?
NSN 4820-00-405-1809 has 1 manufacturer part number on file: 501-43 (Zurn Industries Inc Wilkins Regulator Co Div).
What NSN replaces 4820-00-405-1809?
5 possible matches (shared part number, not a government interchangeability claim): 5930-01-048-7549, 5999-01-157-4703, 3120-01-239-7182. Verify interchangeability with system specifications before substitution.
What are the specifications of 501-43?
Key specifications for 501-43: Material: RUBBER CHLOROPRENE CLASS CR AND PLASTIC POLYAMIDE NYLON. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-00-405-1809 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.