PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

803-2177934-X6XX-18Seat,valve

Naval Ship Systems Command · NSN 4820-01-267-9077 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-267-9077 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-267-9077. Primary manufacturer part number: 803-2177934-X6XX-18.
Features
  • Seat,valve — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Naval Ship Systems Command
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-267-9077, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Naval Ship Systems Command. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-267-9077
Primary Part Number803-2177934-X6XX-18
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNaval Ship Systems Command
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
4820-00-433-7044 INTERCHANGEABLE
Seat,valve
4820-01-043-36262620-902ASSYCF1 1/2INPC4 INTERCHANGEABLE
Seat,valve
The Walworth Company
4820-01-706-9514 INTERCHANGEABLE
Seat,valve
Cross-Reference Index
Part NumberManufacturer
803-2177934-X6XX-18 Naval Ship Systems Command (USA)
803-2177934-X7XX-18 Naval Ship Systems Command (USA)
Related Parts
4820-00-433-7044INTERCHANGEABLE
SEAT,VALVE
4820-01-043-3626INTERCHANGEABLE
SEAT,VALVE
2620-902ASSYCF1 1/2INPC4
4820-01-706-9514INTERCHANGEABLE
SEAT,VALVE

Frequently Asked Questions

What is NSN 4820-01-267-9077?

NSN 4820-01-267-9077 is a Seat,valve, manufactured by Naval Ship Systems Command, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-267-9077?

NSN 4820-01-267-9077 has 2 cross-referenced part numbers: 803-2177934-X6XX-18 (Naval Ship Systems Command), 803-2177934-X7XX-18 (Naval Ship Systems Command).

What NSN replaces 4820-01-267-9077?

There are 3 known substitutes for 4820-01-267-9077: 4820-00-433-7044, 4820-01-043-3626, 4820-01-706-9514. Verify interchangeability with system specifications before substitution.

What are the specifications of 803-2177934-X6XX-18?

Key specifications for 803-2177934-X6XX-18: End Item Identification: VALVE ANL 1.50IPS 700 PSI SWLDG COPNI; VALVE 1.50IPS 700PSI SWLDG BRZ; VALVE GLB 1.50IPS 700PSI SWLDG CUNI; VALVE ANL STP 1.25IPS 700PSI SWLDG COP NI; VALVE GLB STP 1.50IPS 700PSI SB COP NI. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-267-9077 still in active supply?

NSN 4820-01-267-9077 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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