NSN 4820-01-257-8656 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-257-8656. Manufacturer of record part number: 32100.
Also searched as4820-01-257-8656 ·
4820012578656 ·
NIIN 012578656 ·
01-257-8656 ·
FSC 4820 Valves, Nonpowered · CAGE 03670 · 32100
Connection Type: THREADED INTERNAL PIPE SECOND END
Style Designator: STRAIGHT THRU
Thread Direction: RIGHT-HAND ALL ENDS
Nominal Thread Size: 2.000 INCHES SECOND END IN
Nominal Thread Size: 3.000 INCHES FIRST END IN
Identification
NSN: 4820-01-257-8656
NIIN: 012578656
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 32100
Manufacturer: Tyco Fire Products Lp
General Description
The Valve,check, cataloged under National Stock Number 4820-01-257-8656, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tyco Fire Products Lp. 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
4820-01-257-8656
Primary Part Number
32100
Item Name
Valve,check
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Tyco Fire Products Lp
Status
ACTIVE
Flow Control Device
DISK
Connection Type
THREADED INTERNAL HOSE FIRST END
Connection Type
THREADED INTERNAL PIPE SECOND END
Style Designator
STRAIGHT THRU
Thread Direction
RIGHT-HAND ALL ENDS
Nominal Thread Size
2.000 INCHES SECOND END IN
Nominal Thread Size
3.000 INCHES FIRST END IN
Material
COPPER ALLOY BODY
Thread Series Designator
NPSH FIRST END
Thread Series Designator
NPT SECOND END
Valve Operation Method
AUTOMATIC
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.
2910-01-435-637632100POSSIBLE MATCH
CYLINDER ASSEMBLY,METERING AND D
Possible match (shared part number)Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
6240-01-459-247832100POSSIBLE MATCH
LAMP,METAL HALIDE
Possible match (shared part number)Venture Lighting International, Inc. Dba Venture Lighting Intl
6515-01-563-528532100POSSIBLE MATCH
ADAPTER,INFUSION
Possible match (shared part number)Carmel Pharma, Inc.
3220-01-565-767732-100POSSIBLE MATCH
JOINTER,WOODWORKING
Possible match (shared part number)Black and Decker Us Inc
6515-01-603-64448806HPOSSIBLE MATCH
SUTURE,NONABSORBABLE,SURGICAL
Possible match (shared part number)Ethicon Us Llc Div Ethicon
NSN 4820-01-257-8656 is a Valve,check, manufactured by Tyco Fire Products Lp, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-257-8656?
NSN 4820-01-257-8656 has 1 manufacturer part number on file: 32100 (Tyco Fire Products Lp).
What NSN replaces 4820-01-257-8656?
5 possible matches (shared part number, not a government interchangeability claim): 2910-01-435-6376, 6240-01-459-2478, 6515-01-563-5285. Verify interchangeability with system specifications before substitution.
What are the specifications of 32100?
Key specifications for 32100: Flow Control Device: DISK; Connection Type: THREADED INTERNAL HOSE FIRST END; Connection Type: THREADED INTERNAL PIPE SECOND END; Style Designator: STRAIGHT THRU. 11 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-257-8656 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.