PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MB-74 FIND NO.138Seat,valve

Tescom Corp Dba Tescom Div Tescom · NSN 4820-01-633-6353 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-633-6353 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-633-6353. Primary manufacturer part number: MB-74 FIND NO.138.
Features
  • Seat,valve — FSC 4820
  • 4 verified cross-references
  • Primary manufacturer: Tescom Corp Dba Tescom Div Tescom
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-633-6353, 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. This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSeat,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersTescom Corp Dba Tescom Div Tescom (CAGE 13669); Naval Inventory Control Point Mechanicsburg (CAGE 03950)
Technical Specifications
ParameterValue
NSN4820-01-633-6353
Primary Part NumberMB-74 FIND NO.138
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTescom Corp Dba Tescom Div Tescom
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4440-00-767-940362991 INTERCHANGEABLE
Cylinder,dry Air
Aqw Inc
1420-00-802-0754 INTERCHANGEABLE
Arm,nozzle,pivot
3040-01-437-7125M3465-23 INTERCHANGEABLE
Actuator,mechanical,nonaircraft
Yale Industrial Products, Inc. Div Duff Norton Company
Cross-Reference Index
Part NumberManufacturer
MB-74 FIND NO.138 Tescom Corp Dba Tescom Div Tescom (USA)
6299-1D0 Naval Inventory Control Point Mechanicsburg (USA)
6299-1 Tescom Corp Dba Tescom Div Tescom (USA)
MB-74 FIND NO.138D0 Naval Inventory Control Point Mechanicsburg (USA)
Related Parts
4440-00-767-9403INTERCHANGEABLE
CYLINDER,DRY AIR
62991
1420-00-802-0754INTERCHANGEABLE
ARM,NOZZLE,PIVOT
3040-01-437-7125INTERCHANGEABLE
ACTUATOR,MECHANICAL,NONAIRCRAFT
M3465-23

Frequently Asked Questions

What is NSN 4820-01-633-6353?

NSN 4820-01-633-6353 is a Seat,valve, 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 4820-01-633-6353?

NSN 4820-01-633-6353 has 4 cross-referenced part numbers: MB-74 FIND NO.138 (Tescom Corp Dba Tescom Div Tescom), 6299-1D0 (Naval Inventory Control Point Mechanicsburg), 6299-1 (Tescom Corp Dba Tescom Div Tescom), MB-74 FIND NO.138D0 (Naval Inventory Control Point Mechanicsburg).

What NSN replaces 4820-01-633-6353?

There are 3 known substitutes for 4820-01-633-6353: 4440-00-767-9403, 1420-00-802-0754, 3040-01-437-7125. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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