PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

N15521Seat,valve

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-117-7483 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-117-7483 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-117-7483. Primary manufacturer part number: N15521.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: ANGULAR
  • Material: STEEL OVERALL
  • Style Designator: THREADED FLANGED
  • Thread Series Designator: UNS SINGLE THREADED PORTION
  • Flange Diameter: 2.500 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 14 SINGLE THREADED PORTION
  • Flange Seat to Disk End Height: 0.375 INCHES NOMINAL IN
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 4820-01-117-7483, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-117-7483
Primary Part NumberN15521
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
Seating Surface ShapeANGULAR
MaterialSTEEL OVERALL
Style DesignatorTHREADED FLANGED
Thread Series DesignatorUNS SINGLE THREADED PORTION
Flange Diameter2.500 INCHES NOMINAL IN
Thread Quantity Per Inch14 SINGLE THREADED PORTION
Flange Seat to Disk End Height0.375 INCHES NOMINAL IN
Nominal Thread Size2.250 INCHES SINGLE THREADED PORTION IN
Seat Angle in Deg45.000 NOMINAL
Under Flange Height1.500 INCHES NOMINAL IN
Thread Class2A SINGLE THREADED PORTION A
Body Inside Diameter1.250 INCHES NOMINAL IN
Thread Length0.750 INCHES NOMINAL SINGLE THREADED PORTION IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
6680-00-041-3537 INTERCHANGEABLE
Window,indicator
5950-00-087-6706 INTERCHANGEABLE
Reactor
3110-00-100-07683382 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5110-00-253-3165 INTERCHANGEABLE
Reamer,hand
3020-00-917-7593155-21 INTERCHANGEABLE
Gear,spur
Southern Gear & Machine Inc
3455-01-045-33651725-0500 INTERCHANGEABLE
Cutter,milling,end
New York Twist Drill Inc
1615-01-103-6913 INTERCHANGEABLE
Rotor
8145-01-141-226515521 INTERCHANGEABLE
Shipping and Storage Container
Naval Inventory Control Point
3030-01-168-4315 INTERCHANGEABLE
Belt,v
2510-01-446-35681552-1 INTERCHANGEABLE
Cap,truck,mounting
Mcclarin Plastics, Llc Dba Mcclarin Plastics Llc Div Mcclarin Composites - Wapato
Cross-Reference Index
Part NumberManufacturer
15521 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
N15521 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
6680-00-041-3537INTERCHANGEABLE
WINDOW,INDICATOR
5950-00-087-6706INTERCHANGEABLE
REACTOR
3110-00-100-0768INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
3382
5110-00-253-3165INTERCHANGEABLE
REAMER,HAND
3020-00-917-7593INTERCHANGEABLE
GEAR,SPUR
155-21
3455-01-045-3365INTERCHANGEABLE
CUTTER,MILLING,END
1725-0500
1615-01-103-6913INTERCHANGEABLE
ROTOR
8145-01-141-2265INTERCHANGEABLE
SHIPPING AND STORAGE CONTAINER
15521
3030-01-168-4315INTERCHANGEABLE
BELT,V
2510-01-446-3568INTERCHANGEABLE
CAP,TRUCK,MOUNTING
1552-1
6680-01-581-5083INTERCHANGEABLE
ANEMOMETER
AVM440-A

Frequently Asked Questions

What is NSN 4820-01-117-7483?

NSN 4820-01-117-7483 is a Seat,valve, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-117-7483?

NSN 4820-01-117-7483 has 2 cross-referenced part numbers: 15521 (Leslie Controls, Inc. Dba Leslie Controls Inc), N15521 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-117-7483?

There are 11 known substitutes for 4820-01-117-7483: 6680-00-041-3537, 5950-00-087-6706, 3110-00-100-0768 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of N15521?

Key specifications for N15521: Seating Surface Shape: ANGULAR; Material: STEEL OVERALL; Style Designator: THREADED FLANGED; Thread Series Designator: UNS SINGLE THREADED PORTION. 13 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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