NSN 4820-01-505-5944 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-505-5944. Manufacturer of record part number: 45M-433B.
The Guide,diaphragm,valve, cataloged under National Stock Number 4820-01-505-5944, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Metrex Valve Corp. Dba Metrex Valve Corp. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-505-5944
Primary Part Number
45M-433B
Item Name
Guide,diaphragm,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Metrex Valve Corp. Dba Metrex Valve Corp
Status
ACTIVE
Material
NICKEL ALLOY
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 Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-505-658445M-434POSSIBLE MATCH
GUIDE,VALVE STEM
Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp
4820-01-505-661227M-175BPOSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp
4820-01-505-715231M-54POSSIBLE MATCH
DIAPHRAGM,VALVE,FLAT
Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp
4820-01-505-718845M-437BPOSSIBLE MATCH
RETAINER,DIAPHRAGM
Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp
4820-01-505-765045M-436APOSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp
4820-01-505-7718M900PST-125FL9-2WPOSSIBLE MATCH
VALVE,REGULATING,FLUID PRESSURE
Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp
4820-01-570-2299M900PST-150FL9-2WPOSSIBLE MATCH
VALVE,REGULATING,FLUID PRESSURE
Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp
4820-01-622-521229M-134BPOSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Metrex Valve Corp. Dba Metrex Valve Corp
NSN 4820-01-505-5944 is a Guide,diaphragm,valve, manufactured by Metrex Valve Corp. Dba Metrex Valve Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-505-5944?
NSN 4820-01-505-5944 has 2 manufacturer part numbers on file: M900P-1215FL-2W ITEM 10 (Metrex Valve Corp. Dba Metrex Valve Corp), 45M-433B (Metrex Valve Corp. Dba Metrex Valve Corp).
What NSN replaces 4820-01-505-5944?
8 possible matches (shared part number, not a government interchangeability claim): 4820-01-505-6584, 4820-01-505-6612, 4820-01-505-7152. Verify interchangeability with system specifications before substitution.
What are the specifications of 45M-433B?
Key specifications for 45M-433B: Special Features: NHA VALVE,REGULATING; Material: NICKEL ALLOY. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-505-5944 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.