PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

178131 PC NO 6Seat,valve

Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc · NSN 4820-01-351-8165 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-351-8165 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-351-8165. Primary manufacturer part number: 178131 PC NO 6.
Features
  • Seat,valve — FSC 4820
  • 5 verified cross-references
  • Primary manufacturer: Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-351-8165, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc. This item has 5 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 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)
ManufacturersService Brass and Aluminum Foundry Co, Inc. Dba Service Brass Fittings (CAGE 91643); Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (CAGE 76364)
Technical Specifications
ParameterValue
NSN4820-01-351-8165
Primary Part Number178131 PC NO 6
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerMilwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
4820-01-225-89195071-012-212 INTERCHANGEABLE
Valve,check
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4820-01-352-89395071-011-300 INTERCHANGEABLE
Valve,stop-Check
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4820-01-365-69505071-012-600 INTERCHANGEABLE
Valve,stop-Check
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4820-01-365-70195071C0-0600-24J1 INTERCHANGEABLE
Seat,valve
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
4820-01-365-7123D26135-S-381 INTERCHANGEABLE
Stem,fluid Valve
Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc
Cross-Reference Index
Part NumberManufacturer
5071C00 4006B1 Service Brass and Aluminum Foundry Co, Inc. Dba Service Brass Fittings (USA)
178131 PC NO 6 Service Brass and Aluminum Foundry Co, Inc. Dba Service Brass Fittings (USA)
178131 PC NO 6 PRIMARY Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
178131 Service Brass and Aluminum Foundry Co, Inc. Dba Service Brass Fittings (USA)
5071C00 4006B1 Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA)
Related Parts
4820-01-225-8919INTERCHANGEABLE
VALVE,CHECK
5071-012-212
4820-01-352-8939INTERCHANGEABLE
VALVE,STOP-CHECK
5071-011-300
4820-01-365-6950INTERCHANGEABLE
VALVE,STOP-CHECK
5071-012-600
4820-01-365-7019INTERCHANGEABLE
SEAT,VALVE
5071C0-0600-24J1
4820-01-365-7123INTERCHANGEABLE
STEM,FLUID VALVE
D26135-S-381

Frequently Asked Questions

What is NSN 4820-01-351-8165?

NSN 4820-01-351-8165 is a Seat,valve, manufactured by Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-351-8165?

NSN 4820-01-351-8165 has 5 cross-referenced part numbers: 5071C00 4006B1 (Service Brass and Aluminum Foundry Co, Inc. Dba Service Brass Fittings), 178131 PC NO 6 (Service Brass and Aluminum Foundry Co, Inc. Dba Service Brass Fittings), 178131 PC NO 6 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 178131 (Service Brass and Aluminum Foundry Co, Inc. Dba Service Brass Fittings), 5071C00 4006B1 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc).

What NSN replaces 4820-01-351-8165?

There are 5 known substitutes for 4820-01-351-8165: 4820-01-225-8919, 4820-01-352-8939, 4820-01-365-6950 and 2 more. Verify interchangeability with system specifications before substitution.

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