PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8138-1Diaphragm,valve,flat

Tescom Corp Dba Tescom Div Tescom · NSN 4820-01-442-6771 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-442-6771 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-442-6771. Primary manufacturer part number: 8138-1.
Features
  • Diaphragm,valve,flat — FSC 4820
  • Media for Which Designed: GAS
  • Pressure Rating: 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
  • Temp Rating: 165.0 FAHRENHEIT MAXIMUM DEGF
  • Material: RUBBER FLUOROCARBON CLASS FPM
  • 1 verified cross-reference
  • Primary manufacturer: Tescom Corp Dba Tescom Div Tescom
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Rubber Fluorocarbon Class Fpm construction
General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-442-6771, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Tescom Corp Dba Tescom Div Tescom. Government technical data includes 4 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-442-6771
Primary Part Number8138-1
Item NameDiaphragm,valve,flat
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTescom Corp Dba Tescom Div Tescom
StatusACTIVE
Media for Which DesignedGAS
Pressure Rating1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
Temp Rating165.0 FAHRENHEIT MAXIMUM DEGF
MaterialRUBBER FLUOROCARBON CLASS FPM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
1560-00-474-893581381 INTERCHANGEABLE
Housing Assembly
Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company
5330-00-891-8646570X017 INTERCHANGEABLE
Gasket
Stewart & Stevenson Power Products Llc
5935-00-917-908950-046-0000 INTERCHANGEABLE
Connector,receptacle,electrical
Itt Cannon Rf Products
5998-01-025-1051 INTERCHANGEABLE
Circuit Card Assembly
2805-01-244-729681381 INTERCHANGEABLE
Baffle,airflow,nonaircraft Recip
Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator
6145-01-506-067281381 INTERCHANGEABLE
Wire,electrical
Blake Wire and Cable Corporation Dba Blake Wire & Cable
Cross-Reference Index
Part NumberManufacturer
8138-1 PRIMARY Tescom Corp Dba Tescom Div Tescom (USA)
Related Parts
1560-00-474-8935INTERCHANGEABLE
HOUSING ASSEMBLY
81381
5330-00-891-8646INTERCHANGEABLE
GASKET
570X017
5935-00-917-9089INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
50-046-0000
5998-01-025-1051INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
2805-01-244-7296INTERCHANGEABLE
BAFFLE,AIRFLOW,NONAIRCRAFT RECIP
81381
6145-01-506-0672INTERCHANGEABLE
WIRE,ELECTRICAL
81381

Frequently Asked Questions

What is NSN 4820-01-442-6771?

NSN 4820-01-442-6771 is a Diaphragm,valve,flat, manufactured by Tescom Corp Dba Tescom Div Tescom, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-442-6771?

NSN 4820-01-442-6771 has 1 cross-referenced part number: 8138-1 (Tescom Corp Dba Tescom Div Tescom).

What NSN replaces 4820-01-442-6771?

There are 6 known substitutes for 4820-01-442-6771: 1560-00-474-8935, 5330-00-891-8646, 5935-00-917-9089 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8138-1?

Key specifications for 8138-1: Media for Which Designed: GAS; Pressure Rating: 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Temp Rating: 165.0 FAHRENHEIT MAXIMUM DEGF; Material: RUBBER FLUOROCARBON CLASS FPM. 6 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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