NSN 4820-01-685-5326 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-685-5326. Manufacturer of record part number: YC20100SE.
Nominal Pipe Size Accommodated: 1.0 INCHES ALL ENDS IN
Connection Style: SOCKET (PIPE) ALL ENDS
Mounting Position: HORIZONTAL OR VERTICAL
Minimum Operating Temp: 40.0 FAHRENHEIT DEGF
Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS
Style Designator: STRAIGHT THRU
Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
Identification
NSN: 4820-01-685-5326
NIIN: 016855326
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: YC20100SE
Manufacturer: Haywardindl. Products, Inc.
General Description
The Valve,check, cataloged under National Stock Number 4820-01-685-5326, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Haywardindl. Products, Inc.. Government technical data includes 13 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-685-5326
Primary Part Number
YC20100SE
Item Name
Valve,check
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Haywardindl. Products, Inc.
Status
ACTIVE
Nominal Pipe Size Accommodated
1.0 INCHES ALL ENDS IN
Connection Style
SOCKET (PIPE) ALL ENDS
Mounting Position
HORIZONTAL OR VERTICAL
Minimum Operating Temp
40.0 FAHRENHEIT DEGF
Connection Type
UNTHREADED INTERNAL PIPE ALL ENDS
Style Designator
STRAIGHT THRU
Operating Pressure
150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-685-5326?
NSN 4820-01-685-5326 is a Valve,check, manufactured by Haywardindl. Products, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-685-5326?
NSN 4820-01-685-5326 has 2 manufacturer part numbers on file: 38W166 (Grainger W W Inc Grainger Div), YC20100SE (Haywardindl. Products, Inc.).
What are the specifications of YC20100SE?
Key specifications for YC20100SE: Nominal Pipe Size Accommodated: 1.0 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Minimum Operating Temp: 40.0 FAHRENHEIT DEGF. 13 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-685-5326 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.