General Characteristics Item Description: SPRING WASHER MADE OF NAVEL BRASS
Identification
NSN: 4820-01-149-7866
NIIN: 011497866
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
General Description
The Retainer,spring,valve, cataloged under National Stock Number 4820-01-149-7866, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-149-7866
Item Name
Retainer,spring,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
General Characteristics Item Description
SPRING WASHER MADE OF NAVEL BRASS
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.
4820-01-149-7867POSSIBLE MATCH
GUIDE,VALVE STEM
Possible match (shared part number)
4820-01-150-0454POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)
3040-01-150-4928B48535MEFPOSSIBLE MATCH
LEVER,MANUAL CONTROL
Possible match (shared part number)Hunt Valve Company, Inc.
3040-01-151-6337A48660MDAPOSSIBLE MATCH
LEVER,MANUAL CONTROL
Possible match (shared part number)Hunt Valve Company Inc Dba Union Flonetics
4820-01-274-4725POSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
A48534MBF
C/1Advisory reference — outside the item-of-supply concept
Hunt Valve Company, Inc.
A48534MBF
3/9Design control — primary reference
Hunt Valve Company Inc Dba Union Flonetics
D49275
D/9Drawing number reference only
Hunt Valve Company Inc Dba Union Flonetics
Related Parts
4820-01-149-7867POSSIBLE MATCH
GUIDE,VALVE STEM
4820-01-150-0454POSSIBLE MATCH
STEM,FLUID VALVE
3040-01-150-4928POSSIBLE MATCH
LEVER,MANUAL CONTROL
B48535MEF
3040-01-151-6337POSSIBLE MATCH
LEVER,MANUAL CONTROL
A48660MDA
4820-01-274-4725POSSIBLE MATCH
VALVE,SAFETY RELIEF
Frequently Asked Questions
What is NSN 4820-01-149-7866?
NSN 4820-01-149-7866 is a Retainer,spring,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-149-7866?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-149-7867, 4820-01-150-0454, 3040-01-150-4928. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-149-7866?
Key specifications for 4820-01-149-7866: General Characteristics Item Description: SPRING WASHER MADE OF NAVEL BRASS. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-149-7866 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.