PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

14020-H-33011Seat,valve

Flowserve Inc · NSN 4820-01-136-3836 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-136-3836 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-136-3836. Primary manufacturer part number: 14020-H-33011.
Features
  • Seat,valve — FSC 4820
  • Seat Angle in Deg: 45.000 NOMINAL
  • Flange Seat to Disk End Height: 0.312 INCHES NOMINAL IN
  • Style Designator: PLAIN FLANGED
  • Seating Surface Shape: ANGULAR
  • Material: STEEL OVERALL
  • Body Inside Diameter: 1.625 INCHES NOMINAL IN
  • Under Flange Height: 0.312 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 4820-01-136-3836, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Flowserve Inc. Government technical data includes 9 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-136-3836
Primary Part Number14020-H-33011
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerFlowserve Inc
StatusACTIVE
Seat Angle in Deg45.000 NOMINAL
Flange Seat to Disk End Height0.312 INCHES NOMINAL IN
Style DesignatorPLAIN FLANGED
Seating Surface ShapeANGULAR
MaterialSTEEL OVERALL
Body Inside Diameter1.625 INCHES NOMINAL IN
Under Flange Height0.312 INCHES NOMINAL IN
Body Outside Diameter1.812 INCHES NOMINAL IN
Flange Diameter2.115 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-036-156413987 INTERCHANGEABLE
Seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
5305-00-507-9281 INTERCHANGEABLE
Screw,machine
4730-00-842-7880 INTERCHANGEABLE
Elbow,pipe
5365-00-964-040113987 INTERCHANGEABLE
Spring Retainer
Drs C3 & Aviation Company Dba Drs Data & Imaging Systems
7930-01-112-351513987 INTERCHANGEABLE
Dishwashing Compound,machine
Ecolab Inc
6520-01-182-463313987 INTERCHANGEABLE
Point,endodontic
Kerr Corporation
5950-01-205-4782G125737-1 INTERCHANGEABLE
Reactor
Raytheon Company Dba Raytheon Co
6210-01-271-752213987 INTERCHANGEABLE
Filter,indicator Light
Aerosonic Llc
4720-01-353-29513010606-6-6-6-14.00 INTERCHANGEABLE
Hose Assembly,nonmetallic
Parker-Hannifin Corporation Dba Pneutronics Div Hose Products Division
5985-01-360-905013987 INTERCHANGEABLE
Case,antenna
General Dynamics Mission Systems, Inc.
Cross-Reference Index
Part NumberManufacturer
14020-H-33011 PRIMARY Flowserve Inc (USA)
13987 Flowserve Inc (USA)
Related Parts
4820-00-036-1564INTERCHANGEABLE
SEAT,VALVE
13987
5305-00-507-9281INTERCHANGEABLE
SCREW,MACHINE
4730-00-842-7880INTERCHANGEABLE
ELBOW,PIPE
5365-00-964-0401INTERCHANGEABLE
SPRING RETAINER
13987
7930-01-112-3515INTERCHANGEABLE
DISHWASHING COMPOUND,MACHINE
13987
6520-01-182-4633INTERCHANGEABLE
POINT,ENDODONTIC
13987
5950-01-205-4782INTERCHANGEABLE
REACTOR
G125737-1
6210-01-271-7522INTERCHANGEABLE
FILTER,INDICATOR LIGHT
13987
4720-01-353-2951INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
3010606-6-6-6-14.00
5985-01-360-9050INTERCHANGEABLE
CASE,ANTENNA
13987
5342-01-414-3095INTERCHANGEABLE
DOOR,ACCESS,WEAPON SYSTEM
1398-7
3020-01-523-7205INTERCHANGEABLE
GEAR,HELICAL
13987

Frequently Asked Questions

What is NSN 4820-01-136-3836?

NSN 4820-01-136-3836 is a Seat,valve, manufactured by Flowserve Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-136-3836?

NSN 4820-01-136-3836 has 2 cross-referenced part numbers: 14020-H-33011 (Flowserve Inc), 13987 (Flowserve Inc).

What NSN replaces 4820-01-136-3836?

There are 12 known substitutes for 4820-01-136-3836: 4820-00-036-1564, 5305-00-507-9281, 4730-00-842-7880 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 14020-H-33011?

Key specifications for 14020-H-33011: Seat Angle in Deg: 45.000 NOMINAL; Flange Seat to Disk End Height: 0.312 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED; Seating Surface Shape: ANGULAR. 10 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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