NSN 4820-00-407-8510 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-407-8510. Manufacturer of record part number: 80027-5.
Body Outside Diameter: 0.424 INCHES MINIMUM AND 0.428 INCHES MAXIMUM IN
Style Designator: PLAIN
Body Inside Diameter: 0.293 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN
Material: STEEL OVERALL
Seating Surface Shape: FLAT
2 manufacturer part numbers on file
Manufacturer of record: Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
Identification
NSN: 4820-00-407-8510
NIIN: 004078510
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 80027-5
Manufacturer: Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
General Description
The Seat,valve, cataloged under National Stock Number 4820-00-407-8510, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. Government technical data includes 5 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. 4 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
4820-00-407-8510
Primary Part Number
80027-5
Item Name
Seat,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
Status
ACTIVE
Body Outside Diameter
0.424 INCHES MINIMUM AND 0.428 INCHES MAXIMUM IN
Style Designator
PLAIN
Body Inside Diameter
0.293 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN
Material
STEEL OVERALL
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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5935-01-013-7223205210-1POSSIBLE MATCH
CONNECTOR BODY,RECEPTACLE,ELECTR
Possible match (shared part number)Te Connectivity Corporation
2930-01-067-8266800274/A1POSSIBLE MATCH
MANIFOLD,WATER OUTLET
Possible match (shared part number)Rolls-Royce Solutions America Inc
4310-01-553-1698800274POSSIBLE MATCH
COMPRESSOR UNIT,RECIPROCATING
Possible match (shared part number)Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
5340-01-615-5220800275POSSIBLE MATCH
BRACKET,MOUNTING
Possible match (shared part number)Kidde Technologies, Inc Div Kidde Aerospace and Defense
Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA)
Related Parts
5935-01-013-7223POSSIBLE MATCH
CONNECTOR BODY,RECEPTACLE,ELECTR
205210-1
2930-01-067-8266POSSIBLE MATCH
MANIFOLD,WATER OUTLET
800274/A1
4310-01-553-1698POSSIBLE MATCH
COMPRESSOR UNIT,RECIPROCATING
800274
5340-01-615-5220POSSIBLE MATCH
BRACKET,MOUNTING
800275
Frequently Asked Questions
What is NSN 4820-00-407-8510?
NSN 4820-00-407-8510 is a Seat,valve, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-407-8510?
NSN 4820-00-407-8510 has 2 manufacturer part numbers on file: 80027-5 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), 80027-4 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok).
What NSN replaces 4820-00-407-8510?
4 possible matches (shared part number, not a government interchangeability claim): 5935-01-013-7223, 2930-01-067-8266, 4310-01-553-1698. Verify interchangeability with system specifications before substitution.
What are the specifications of 80027-5?
Key specifications for 80027-5: Overall Height: 0.120 INCHES NOMINAL IN; Body Outside Diameter: 0.424 INCHES MINIMUM AND 0.428 INCHES MAXIMUM IN; Style Designator: PLAIN; Body Inside Diameter: 0.293 INCHES MINIMUM AND 0.297 INCHES MAXIMUM IN. 5 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-407-8510 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.