NSN 4820-01-702-2866 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-702-2866. Manufacturer of record part number: 7508190.
The Piston,valve, cataloged under National Stock Number 4820-01-702-2866, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ammcon Corp.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Piston,valve
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Manufacturers
Ammcon Corp. (CAGE 6W889)
Technical Specifications
Parameter
Value
NSN
4820-01-702-2866
Primary Part Number
7508190
Item Name
Piston,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Ammcon Corp.
Status
ACTIVE
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.
C/1Advisory reference — outside the item-of-supply concept
Ammcon Corp.
BMC-3479A-1
D/9Drawing number reference only
Ammcon Corp.
Related Parts
4820-01-702-2883POSSIBLE MATCH
VALVE,VACUUM BREAKING
7508174
4810-01-702-4379POSSIBLE MATCH
PLUNGER,ACTUATOR
7508194
4810-01-702-4518POSSIBLE MATCH
RETAINER,SEAT,VALVE
7508195
4810-01-702-5341POSSIBLE MATCH
HEAD,VALVE
7508186
Frequently Asked Questions
What is NSN 4820-01-702-2866?
NSN 4820-01-702-2866 is a Piston,valve, manufactured by Ammcon Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-702-2866?
NSN 4820-01-702-2866 has 1 manufacturer part number on file: 7508190 (Ammcon Corp.).
What NSN replaces 4820-01-702-2866?
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-702-2883, 4810-01-702-4379, 4810-01-702-4518. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-702-2866 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.