NSN 4820-00-167-4206 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-167-4206. Manufacturer of record part number: 3040-01.
The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-167-4206, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Automatic Control Valve Inc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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
4820-00-167-4206
Primary Part Number
3040-01
Item Name
Diaphragm,valve,flat
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Watts Automatic Control Valve Inc
Status
ACTIVE
Outside Diameter
9.875 INCHES NOMINAL IN
Material Thickness
0.050 INCHES NOMINAL IN
Bolt Hole Quantity
8
Bolt Circle Diameter
8.812 INCHES NOMINAL IN
Center Hole Diameter
0.625 INCHES NOMINAL IN
Material
PLASTIC POLYAMIDE NYLON
Hole Diameter
0.500 INCHES NOMINAL IN
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 Items9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5950-00-252-2643304001POSSIBLE MATCH
TRANSFORMER,POWER
Possible match (shared part number)Naval Ship Systems Command
6675-00-353-387530401POSSIBLE MATCH
HEAD
Possible match (shared part number)Gurley Precision Instruments Inc
1730-00-758-0102POSSIBLE MATCH
GUARD,AIRCRAFT GROUND SERVICING
Possible match (shared part number)
4935-01-032-9586POSSIBLE MATCH
INSTRUMENT KIT
Possible match (shared part number)
4720-01-046-299730401POSSIBLE MATCH
HOSE,NONMETALLIC
Possible match (shared part number)Eaglepicher Corp
6105-01-207-1884POSSIBLE MATCH
MOTOR,GEAR
Possible match (shared part number)
3110-01-211-174630401POSSIBLE MATCH
BEARING
Possible match (shared part number)Eaton Aerospace Llc Dba Eaton Aerospace Jackson
4020-01-275-025830401POSSIBLE MATCH
CORD,FIBROUS
Possible match (shared part number)L & R Manufacturing Company
4720-01-284-324430401POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Little Beaver Inc
NSN 4820-00-167-4206 is a Diaphragm,valve,flat, manufactured by Watts Automatic Control Valve Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-167-4206?
NSN 4820-00-167-4206 has 1 manufacturer part number on file: 3040-01 (Watts Automatic Control Valve Inc).
What NSN replaces 4820-00-167-4206?
9 possible matches (shared part number, not a government interchangeability claim): 5950-00-252-2643, 6675-00-353-3875, 1730-00-758-0102. Verify interchangeability with system specifications before substitution.
What are the specifications of 3040-01?
Key specifications for 3040-01: Outside Diameter: 9.875 INCHES NOMINAL IN; Material Thickness: 0.050 INCHES NOMINAL IN; Bolt Hole Quantity: 8; Bolt Circle Diameter: 8.812 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-167-4206 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.