NSN 4820-00-428-7850 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-428-7850. Manufacturer of record part number: M11434/1ITEM4.
Flange Seat to Disk End Height: 0.250 INCHES NOMINAL IN
Flange Diameter: 3.812 INCHES NOMINAL IN
Style Designator: THREADED FLANGED
Body Inside Diameter: 3.000 INCHES NOMINAL IN
Under Flange Height: 0.438 INCHES NOMINAL IN
Material: NICKEL ALLOY OVERALL
Seating Surface Shape: FLAT
Identification
NSN: 4820-00-428-7850
NIIN: 004287850
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: M11434/1ITEM4
Manufacturer: Shipham Valves Limited
General Description
The Seat,valve, cataloged under National Stock Number 4820-00-428-7850, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Shipham Valves Limited. Government technical data includes 7 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. Current acquisition status: Active.
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 4820-00-428-7850?
NSN 4820-00-428-7850 is a Seat,valve, manufactured by Shipham Valves Limited, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-428-7850?
NSN 4820-00-428-7850 has 2 manufacturer part numbers on file: M11434IM4 (Shipham Valves Limited), M11434/1ITEM4 (Shipham Valves Limited).
What are the specifications of M11434/1ITEM4?
Key specifications for M11434/1ITEM4: Flange Seat to Disk End Height: 0.250 INCHES NOMINAL IN; Flange Diameter: 3.812 INCHES NOMINAL IN; Style Designator: THREADED FLANGED; Body Inside Diameter: 3.000 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-428-7850 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.