NSN 4820-00-334-3862 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-334-3862. Manufacturer of record part number: 43077.
Also searched as4820-00-334-3862 ·
4820003343862 ·
NIIN 003343862 ·
00-334-3862 ·
FSC 4820 Valves, Nonpowered · CAGE 53059 · 43077
Flange Seat to Disk End Height: 0.125 INCHES NOMINAL IN
Flange Diameter: 1.125 INCHES NOMINAL IN
Thread Length: 0.344 INCHES NOMINAL SINGLE THREADED PORTION IN
Style Designator: THREADED FLANGED
Body Inside Diameter: 0.250 INCHES NOMINAL IN
Nominal Thread Size: 0.875 INCHES SINGLE THREADED PORTION IN
Under Flange Height: 0.343 INCHES NOMINAL IN
Identification
NSN: 4820-00-334-3862
NIIN: 003343862
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 43077
Manufacturer: Spirax Sarco Inc Dba Spirax Sarco
General Description
The Seat,valve, cataloged under National Stock Number 4820-00-334-3862, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Spirax Sarco Inc Dba Spirax Sarco. Government technical data includes 11 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. 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
4820-00-334-3862
Primary Part Number
43077
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Spirax Sarco Inc Dba Spirax Sarco
Status
ACTIVE
Flange Seat to Disk End Height
0.125 INCHES NOMINAL IN
Flange Diameter
1.125 INCHES NOMINAL IN
Thread Length
0.344 INCHES NOMINAL SINGLE THREADED PORTION IN
Style Designator
THREADED FLANGED
Body Inside Diameter
0.250 INCHES NOMINAL IN
Nominal Thread Size
0.875 INCHES SINGLE THREADED PORTION IN
Under Flange Height
0.343 INCHES NOMINAL IN
Thread Class
2A SINGLE THREADED PORTION A
Material
STEEL CORROSION RESISTING OVERALL
Thread Series Designator
UNEF SINGLE THREADED PORTION
Seating Surface Shape
FLAT
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.
4820-00-400-6684POSSIBLE MATCH
PACKING RING
Possible match (shared part number)
5950-00-539-702143077POSSIBLE MATCH
COIL,ELECTRICAL
Possible match (shared part number)L3harris Technologies, Inc Div Space & Airborne Systems
2995-00-992-818343077POSSIBLE MATCH
PARTS KIT,VALVE,OVE
Possible match (shared part number)Ontic Engineering & Manufacturing, Inc Dba Ontic Us
5905-01-294-1957698-3-R10KDPOSSIBLE MATCH
RESISTOR NETWORK,FIXED,FILM
Possible match (shared part number)Bi Technologies Corporation Div Bi Technologies Corp.
5962-01-313-881543-077POSSIBLE MATCH
MICROCIRCUIT,DIGITAL
Possible match (shared part number)Hydro-Aire Aerospace Corp
NSN 4820-00-334-3862 is a Seat,valve, manufactured by Spirax Sarco Inc Dba Spirax Sarco, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-334-3862?
NSN 4820-00-334-3862 has 1 manufacturer part number on file: 43077 (Spirax Sarco Inc Dba Spirax Sarco).
What NSN replaces 4820-00-334-3862?
5 possible matches (shared part number, not a government interchangeability claim): 4820-00-400-6684, 5950-00-539-7021, 2995-00-992-8183. Verify interchangeability with system specifications before substitution.
What are the specifications of 43077?
Key specifications for 43077: Flange Seat to Disk End Height: 0.125 INCHES NOMINAL IN; Flange Diameter: 1.125 INCHES NOMINAL IN; Thread Length: 0.344 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: THREADED FLANGED. 11 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-334-3862 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.