PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8-41Seat,valve

Dynatech Frontier Corp Sub of Dynatech Corp · NSN 4820-00-136-4544 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-136-4544 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-136-4544. Primary manufacturer part number: 8-41.
Features
  • Seat,valve — FSC 4820
  • Seating Surface Shape: FLAT
  • Style Designator: PLAIN FLANGED
  • Body Inside Diameter: 0.188 INCHES NOMINAL IN
  • Material Document and Classification: AMS,3650 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Material: PLASTIC OVERALL
  • Under Flange Height: 0.070 INCHES NOMINAL IN
  • Body Outside Diameter: 0.375 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Plastic Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-136-4544, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Dynatech Frontier Corp Sub of Dynatech Corp. Government technical data includes 9 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-136-4544
Primary Part Number8-41
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerDynatech Frontier Corp Sub of Dynatech Corp
StatusACTIVE
Seating Surface ShapeFLAT
Style DesignatorPLAIN FLANGED
Body Inside Diameter0.188 INCHES NOMINAL IN
Material Document and ClassificationAMS,3650 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MaterialPLASTIC OVERALL
Under Flange Height0.070 INCHES NOMINAL IN
Body Outside Diameter0.375 INCHES NOMINAL IN
Flange Seat to Disk End Height0.130 INCHES NOMINAL IN
Flange Diameter0.490 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4030-00-089-7012 INTERCHANGEABLE
Anchor,guy
6625-00-165-2116841-15788 INTERCHANGEABLE
Ammeter
Phaostron Instrument and Electronic Company
5310-00-186-0971 INTERCHANGEABLE
Washer,key
5962-00-193-5036643558-001 INTERCHANGEABLE
Microcircuit,linear
Watkins Johnson Co
9905-00-209-4531940100-2 INTERCHANGEABLE
Band,marker
Raytheon Company Dba Raytheon
3030-00-262-894832494 INTERCHANGEABLE
Belt,v
Contitech Usa, Inc Dba Veyance Technologies
5340-00-290-36263038-9012PC12 INTERCHANGEABLE
Clamp,loop
Northrop Grumman Systems Corporation
6130-00-339-1069841 INTERCHANGEABLE
Power Supply
Charles Industries, Llc Div Telecom
9340-00-599-928817Y1495PC737 INTERCHANGEABLE
Tubing,glass
Naval Ship Systems Command
6130-00-635-6182 INTERCHANGEABLE
Rectifier,metallic
Cross-Reference Index
Part NumberManufacturer
8-41 Dynatech Frontier Corp Sub of Dynatech Corp (USA)
Related Parts
4030-00-089-7012INTERCHANGEABLE
ANCHOR,GUY
6625-00-165-2116INTERCHANGEABLE
AMMETER
841-15788
5310-00-186-0971INTERCHANGEABLE
WASHER,KEY
5962-00-193-5036INTERCHANGEABLE
MICROCIRCUIT,LINEAR
643558-001
9905-00-209-4531INTERCHANGEABLE
BAND,MARKER
940100-2
3030-00-262-8948INTERCHANGEABLE
BELT,V
32494
5340-00-290-3626INTERCHANGEABLE
CLAMP,LOOP
3038-9012PC12
6130-00-339-1069INTERCHANGEABLE
POWER SUPPLY
841
9340-00-599-9288INTERCHANGEABLE
TUBING,GLASS
17Y1495PC737
6130-00-635-6182INTERCHANGEABLE
RECTIFIER,METALLIC
5940-00-636-6025INTERCHANGEABLE
TERMINAL BOARD
1382B
5910-00-822-5683INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR

Frequently Asked Questions

What is NSN 4820-00-136-4544?

NSN 4820-00-136-4544 is a Seat,valve, manufactured by Dynatech Frontier Corp Sub of Dynatech Corp, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-136-4544?

NSN 4820-00-136-4544 has 1 cross-referenced part number: 8-41 (Dynatech Frontier Corp Sub of Dynatech Corp).

What NSN replaces 4820-00-136-4544?

There are 12 known substitutes for 4820-00-136-4544: 4030-00-089-7012, 6625-00-165-2116, 5310-00-186-0971 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8-41?

Key specifications for 8-41: Seating Surface Shape: FLAT; Style Designator: PLAIN FLANGED; Body Inside Diameter: 0.188 INCHES NOMINAL IN; Material Document and Classification: AMS,3650 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 9 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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