PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1726Seat,valve

Droitcour Co · NSN 4820-01-408-7017 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-408-7017 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-408-7017. Primary manufacturer part number: 1726.
Features
  • Seat,valve — FSC 4820
  • Body Outside Diameter: 0.327 INCHES NOMINAL IN
  • Style Designator: PLAIN FLANGED
  • Material: STEEL COMP 416 SEAT
  • Body Inside Diameter: 0.031 INCHES NOMINAL IN
  • Flange Diameter: 0.547 INCHES NOMINAL IN
  • 3 verified cross-references
  • Primary manufacturer: Droitcour Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 416 Seat construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-408-7017, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Droitcour Co. Government technical data includes 5 verified specifications, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-408-7017
Primary Part Number1726
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerDroitcour Co
StatusACTIVE
Body Outside Diameter0.327 INCHES NOMINAL IN
Style DesignatorPLAIN FLANGED
MaterialSTEEL COMP 416 SEAT
Body Inside Diameter0.031 INCHES NOMINAL IN
Flange Diameter0.547 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-066-0929 INTERCHANGEABLE
Transformer,radio Frequency
5962-00-156-0983SN7408N INTERCHANGEABLE
Microcircuit,digital
Texas Instruments Incorporated
6680-00-243-9977CT1000-2001 INTERCHANGEABLE
Tachometer,mechanical,handheld
Schulze Mfg., Inc.
5120-00-277-1187JC905A INTERCHANGEABLE
Wrench,open End
The Stanley Works Dba Stanley Proto
5330-00-286-6868ID 1.625IN X OD 2.374 X .50IN W INTERCHANGEABLE
Seal,plain Encased
Defense Logistics Agency Dba Defense Supply Center Philadelphia
5950-00-494-335621008 INTERCHANGEABLE
Transformer,power
Magnetika Inc
4910-00-506-0037 INTERCHANGEABLE
Stand,maintenance,automotive Eng
2835-00-654-677221008 INTERCHANGEABLE
Diffuser Assy,machi
Rtx Corporation Div Pratt & Whitney
5360-00-657-68861726 INTERCHANGEABLE
Spring,helical,compression
Miller-Holzwarth Inc.
6695-00-800-35192100-8 INTERCHANGEABLE
Transducer,motional Pickup
Ametek Inc Schutte and Koerting Div
Cross-Reference Index
Part NumberManufacturer
1726 PRIMARY Droitcour Co (USA)
2252-16 Droitcour Co (USA)
2100-8 Droitcour Co (USA)
Related Parts
5950-00-066-0929INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
5962-00-156-0983INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
SN7408N
6680-00-243-9977INTERCHANGEABLE
TACHOMETER,MECHANICAL,HANDHELD
CT1000-2001
5120-00-277-1187INTERCHANGEABLE
WRENCH,OPEN END
JC905A
5330-00-286-6868INTERCHANGEABLE
SEAL,PLAIN ENCASED
ID 1.625IN X OD 2.374 X .50IN W
5950-00-494-3356INTERCHANGEABLE
TRANSFORMER,POWER
21008
4910-00-506-0037INTERCHANGEABLE
STAND,MAINTENANCE,AUTOMOTIVE ENG
2835-00-654-6772INTERCHANGEABLE
DIFFUSER ASSY,MACHI
21008
5360-00-657-6886INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
1726
6695-00-800-3519INTERCHANGEABLE
TRANSDUCER,MOTIONAL PICKUP
2100-8
6240-00-926-1213INTERCHANGEABLE
LAMP,INCANDESCENT
A1726X
6250-00-951-4844INTERCHANGEABLE
LAMPHOLDER

Frequently Asked Questions

What is NSN 4820-01-408-7017?

NSN 4820-01-408-7017 is a Seat,valve, manufactured by Droitcour Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-408-7017?

NSN 4820-01-408-7017 has 3 cross-referenced part numbers: 1726 (Droitcour Co), 2252-16 (Droitcour Co), 2100-8 (Droitcour Co).

What NSN replaces 4820-01-408-7017?

There are 12 known substitutes for 4820-01-408-7017: 5950-00-066-0929, 5962-00-156-0983, 6680-00-243-9977 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1726?

Key specifications for 1726: Body Outside Diameter: 0.327 INCHES NOMINAL IN; Special Features: LOWER LOCATOR; Style Designator: PLAIN FLANGED; Material: STEEL COMP 416 SEAT. 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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