NSN 4820-01-285-1788 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-285-1788. Manufacturer of record part number: 657-EZ S/N 8413171.
Operating Pressure: 22.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Material: STEEL COMP 316 STEM
Material: STEEL CORROSION RESISTING BODY
Valve Operation Method: AUTOMATIC
Identification
NSN: 4820-01-285-1788
NIIN: 012851788
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 657-EZ S/N 8413171
Manufacturer: Fisher Controls Co Inc
General Description
The Valve,plug, cataloged under National Stock Number 4820-01-285-1788, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fisher Controls Co Inc. Government technical data includes 7 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-285-1788
Primary Part Number
657-EZ S/N 8413171
Item Name
Valve,plug
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Fisher Controls Co Inc
Status
ACTIVE
Flange Shape
ROUND WITH HOLES ALL ENDS
Flange Face Design
RAISED STRAIGHT ALL ENDS
Connection Type
FLANGE ALL ENDS
Operating Pressure
22.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE 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 4820-01-285-1788?
NSN 4820-01-285-1788 is a Valve,plug, manufactured by Fisher Controls Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-285-1788?
NSN 4820-01-285-1788 has 1 manufacturer part number on file: 657-EZ S/N 8413171 (Fisher Controls Co Inc).
What are the specifications of 657-EZ S/N 8413171?
Key specifications for 657-EZ S/N 8413171: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Connection Type: FLANGE ALL ENDS; Operating Pressure: 22.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-285-1788 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.