The Retainer,disk,valve, cataloged under National Stock Number 4820-01-135-6860, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-135-6860
Item Name
Retainer,disk,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Outside Diameter
1.751 INCHES NOMINAL IN
Material
STEEL CORROSION RESISTING
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.
4820-01-136-08512640-402X3 PIECE 28POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-136-24882640-402X3 PIECE 27POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-141-25822640-402X3 PIECE 26POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-145-55892640-402X3 PIECE 1,4POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-220-83042640-402X3POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
845-2050947 PIECE 30
3/2Design control — primary reference
U.S. Government activity
2640-402X3 PIECE 30
3/2Design control — primary reference
U.S. Government activity
2640-402X3
D/9Drawing number reference only
U.S. Government activity
845-2050947
D/9Drawing number reference only
U.S. Government activity
Related Parts
4820-01-136-0851POSSIBLE MATCH
STEM,FLUID VALVE
2640-402X3 PIECE 28
4820-01-136-2488POSSIBLE MATCH
STEM,FLUID VALVE
2640-402X3 PIECE 27
4820-01-141-2582POSSIBLE MATCH
STEM,FLUID VALVE
2640-402X3 PIECE 26
4820-01-145-5589POSSIBLE MATCH
PARTS KIT,BALL VALVE
2640-402X3 PIECE 1,4
4820-01-220-8304POSSIBLE MATCH
PARTS KIT,BALL VALVE
2640-402X3
Frequently Asked Questions
What is NSN 4820-01-135-6860?
NSN 4820-01-135-6860 is a Retainer,disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-135-6860?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-136-0851, 4820-01-136-2488, 4820-01-141-2582. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-135-6860?
Key specifications for 4820-01-135-6860: Outside Diameter: 1.751 INCHES NOMINAL IN; Special Features: 3000 PSI MAX; Material: STEEL CORROSION RESISTING. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-135-6860 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.