NSN 4820-00-931-2186 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-931-2186. Manufacturer of record part number: 1770X1652.
Flange Seat to Disk End Height: 0.312 INCHES NOMINAL IN
Flange Diameter: 0.996 INCHES MINIMUM AND 0.998 INCHES MAXIMUM IN
Body Outside Diameter: 0.870 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
Body Stepped Inside Diameter: 0.343 INCHES NOMINAL FIRST STEP IN
Body Stepped Inside Diameter: 0.688 INCHES NOMINAL SECOND STEP IN
Style Designator: PLAIN FLANGED
Under Flange Height: 0.281 INCHES NOMINAL IN
Identification
NSN: 4820-00-931-2186
NIIN: 009312186
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 1770X1652
Manufacturer: Velan Valve Corp.
General Description
The Seat,valve, cataloged under National Stock Number 4820-00-931-2186, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 11 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 4820-00-931-2186?
NSN 4820-00-931-2186 is a Seat,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-931-2186?
NSN 4820-00-931-2186 has 2 manufacturer part numbers on file: 1770X1652 (Velan Valve Corp.), 1652 (Velan Valve Corp.).
What are the specifications of 1770X1652?
Key specifications for 1770X1652: Flange Seat to Disk End Height: 0.312 INCHES NOMINAL IN; Flange Diameter: 0.996 INCHES MINIMUM AND 0.998 INCHES MAXIMUM IN; Body Outside Diameter: 0.870 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN; Body Stepped Inside Diameter: 0.343 INCHES NOMINAL FIRST STEP IN. 11 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-931-2186 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.