PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

15F-4 4IN ITEM 3Seat,valve

William E Williams Valve Corp · NSN 4820-01-273-0526 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-273-0526 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-273-0526. Primary manufacturer part number: 15F-4 4IN ITEM 3.
Features
  • Seat,valve — FSC 4820
  • Material: STEEL OVERALL
  • 3 verified cross-references
  • Primary manufacturer: William E Williams Valve Corp
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-273-0526, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is William E Williams Valve Corp. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-273-0526
Primary Part Number15F-4 4IN ITEM 3
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerWilliam E Williams Valve Corp
StatusACTIVE
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5315-00-059-5406200356 INTERCHANGEABLE
Pin,straight,headed
Eaton Corporation Dba Airflex Div Div Airflex
3030-00-204-0174356 INTERCHANGEABLE
Belt,v
Contitech Usa, Inc Dba Veyance Technologies
1420-00-404-8937MDV97294-3268 INTERCHANGEABLE
Cable Assembly,tap
Itt Cannon Llc
1620-00-738-07078689 INTERCHANGEABLE
Housing,steering Damper
Goodrich Corporation
5962-01-065-5615711219-1 INTERCHANGEABLE
Microcircuit,linear
Raytheon Company Dba Raytheon Co
6145-01-065-97998689 INTERCHANGEABLE
Wire,electrical
Belden Wire and Cable Co Wire and Cable Office
4820-01-334-935515F4 2.50 IN. ITEM 5 INTERCHANGEABLE
Stem,fluid Valve
William E Williams Valve Corp
4820-01-335-012615F4 2.50 IN ITEM 3 INTERCHANGEABLE
Seat,valve
William E Williams Valve Corp
5930-01-580-75588689 INTERCHANGEABLE
Switch,pressure
Hydra-Electric Company Dba Hydra-Electric Co
Cross-Reference Index
Part NumberManufacturer
15F-4 4IN ITEM 3 PRIMARY William E Williams Valve Corp (USA)
8689 William E Williams Valve Corp (USA)
8689 PIECE 3 William E Williams Valve Corp (USA)
Related Parts
5315-00-059-5406INTERCHANGEABLE
PIN,STRAIGHT,HEADED
200356
3030-00-204-0174INTERCHANGEABLE
BELT,V
356
1420-00-404-8937INTERCHANGEABLE
CABLE ASSEMBLY,TAP
MDV97294-3268
1620-00-738-0707INTERCHANGEABLE
HOUSING,STEERING DAMPER
8689
5962-01-065-5615INTERCHANGEABLE
MICROCIRCUIT,LINEAR
711219-1
6145-01-065-9799INTERCHANGEABLE
WIRE,ELECTRICAL
8689
4820-01-334-9355INTERCHANGEABLE
STEM,FLUID VALVE
15F4 2.50 IN. ITEM 5
4820-01-335-0126INTERCHANGEABLE
SEAT,VALVE
15F4 2.50 IN ITEM 3
5930-01-580-7558INTERCHANGEABLE
SWITCH,PRESSURE
8689

Frequently Asked Questions

What is NSN 4820-01-273-0526?

NSN 4820-01-273-0526 is a Seat,valve, manufactured by William E Williams Valve Corp, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-273-0526?

NSN 4820-01-273-0526 has 3 cross-referenced part numbers: 15F-4 4IN ITEM 3 (William E Williams Valve Corp), 8689 (William E Williams Valve Corp), 8689 PIECE 3 (William E Williams Valve Corp).

What NSN replaces 4820-01-273-0526?

There are 9 known substitutes for 4820-01-273-0526: 5315-00-059-5406, 3030-00-204-0174, 1420-00-404-8937 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 15F-4 4IN ITEM 3?

Key specifications for 15F-4 4IN ITEM 3: Material: STEEL OVERALL. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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