PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

39720Seat,valve

Eaton Aerospace, Llc Dba Jackson South · NSN 4810-00-218-6271 · FSC 4810 · No Item Name Available
Verified by PartsTable
NSN 4810-00-218-6271 — this item is cataloged by the U.S. Government under National Stock Number 4810-00-218-6271. Primary manufacturer part number: 39720.
Features
  • Seat,valve — FSC 4810
  • Body Outside Diameter: 1.252 INCHES NOMINAL IN
  • Body Inside Diameter: 0.875 INCHES NOMINAL IN
  • Seating Surface Shape: FLAT
  • Hardness Rating: 235.0 BRINELL STANDARD MINIMUM AND 311.0 BRINELL STANDARD MAXIMUM OVERALL
  • Style Designator: PLAIN
  • Material: STEEL OVERALL
  • 1 verified cross-reference
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 4810-00-218-6271, is classified within Federal Supply Class 4810 (No Item Name Available) of the Valves group. The primary manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4810-00-218-6271
Primary Part Number39720
Item NameSeat,valve
FSC / FSG4810 / 48 — No Item Name Available
ManufacturerEaton Aerospace, Llc Dba Jackson South
StatusACTIVE
Body Outside Diameter1.252 INCHES NOMINAL IN
Body Inside Diameter0.875 INCHES NOMINAL IN
Seating Surface ShapeFLAT
Hardness Rating235.0 BRINELL STANDARD MINIMUM AND 311.0 BRINELL STANDARD MAXIMUM OVERALL
Style DesignatorPLAIN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5940-00-058-8939 INTERCHANGEABLE
Cover,terminal Board
5835-00-473-100239720 INTERCHANGEABLE
Head,magnetic
Dictaphone Corporation
5340-00-637-1939389-20 INTERCHANGEABLE
Clamp,loop
Transdigm Inc Dba Adel Wiggins Group Div Adel Wiggins
3030-00-727-8655 INTERCHANGEABLE
Belting,round
3040-01-479-497639720 INTERCHANGEABLE
Piston,linear Actuating Cylinder
Moog Inc. Dba Ampac-Isp Corp
Cross-Reference Index
Part NumberManufacturer
39720 PRIMARY Eaton Aerospace, Llc Dba Jackson South (USA)
Related Parts
5940-00-058-8939INTERCHANGEABLE
COVER,TERMINAL BOARD
5835-00-473-1002INTERCHANGEABLE
HEAD,MAGNETIC
39720
5340-00-637-1939INTERCHANGEABLE
CLAMP,LOOP
389-20
3030-00-727-8655INTERCHANGEABLE
BELTING,ROUND
3040-01-479-4976INTERCHANGEABLE
PISTON,LINEAR ACTUATING CYLINDER
39720

Frequently Asked Questions

What is NSN 4810-00-218-6271?

NSN 4810-00-218-6271 is a Seat,valve, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 4810 (No Item Name Available). Status: active.

What are the part numbers for NSN 4810-00-218-6271?

NSN 4810-00-218-6271 has 1 cross-referenced part number: 39720 (Eaton Aerospace, Llc Dba Jackson South).

What NSN replaces 4810-00-218-6271?

There are 5 known substitutes for 4810-00-218-6271: 5940-00-058-8939, 5835-00-473-1002, 5340-00-637-1939 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 39720?

Key specifications for 39720: Body Outside Diameter: 1.252 INCHES NOMINAL IN; Body Inside Diameter: 0.875 INCHES NOMINAL IN; Seating Surface Shape: FLAT; Hardness Rating: 235.0 BRINELL STANDARD MINIMUM AND 311.0 BRINELL STANDARD MAXIMUM OVERALL. 7 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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