PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7664Valve Assembly

Harbormaster Marine, Inc · NSN 4820-01-041-6939 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-041-6939 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-041-6939. Primary manufacturer part number: 7664.
Features
  • Valve Assembly — FSC 4820
  • 4 verified cross-references
  • Primary manufacturer: Harbormaster Marine, Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve Assembly, cataloged under National Stock Number 4820-01-041-6939, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Harbormaster Marine, Inc. This item has 4 commercial cross-references from 3 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 NameValve Assembly
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersHarbormaster Marine, Inc (CAGE 42138); Walworth Co Marine Div (CAGE 90664); Conbraco Industries Inc R-P and C Valve Div (CAGE 86520)
Technical Specifications
ParameterValue
NSN4820-01-041-6939
Primary Part Number7664
Item NameValve Assembly
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHarbormaster Marine, Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5340-00-473-9022766-4 INTERCHANGEABLE
Clamp,loop
Hydro-Aire Aerospace Corp
6630-00-672-9357 INTERCHANGEABLE
Meter,ph
6145-01-390-01177664 INTERCHANGEABLE
Cable,special Purpose,electrical
Belden, Inc.
5962-01-431-0498 INTERCHANGEABLE
Microcircuit,linear
5330-01-509-82397702-03 INTERCHANGEABLE
Packing,preformed
Howell Laboratories Inc Dba Howell Laboratories Inc
Cross-Reference Index
Part NumberManufacturer
7664 Harbormaster Marine, Inc (USA)
7664-1/4IN.NPT Harbormaster Marine, Inc (USA)
5272 Walworth Co Marine Div (USA)
RPC-1/4IN.1040A Conbraco Industries Inc R-P and C Valve Div (USA)
Related Parts
5340-00-473-9022INTERCHANGEABLE
CLAMP,LOOP
766-4
6630-00-672-9357INTERCHANGEABLE
METER,PH
6145-01-390-0117INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
7664
5962-01-431-0498INTERCHANGEABLE
MICROCIRCUIT,LINEAR
5330-01-509-8239INTERCHANGEABLE
PACKING,PREFORMED
7702-03

Frequently Asked Questions

What is NSN 4820-01-041-6939?

NSN 4820-01-041-6939 is a Valve Assembly, manufactured by Harbormaster Marine, Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-041-6939?

NSN 4820-01-041-6939 has 4 cross-referenced part numbers: 7664 (Harbormaster Marine, Inc), 7664-1/4IN.NPT (Harbormaster Marine, Inc), 5272 (Walworth Co Marine Div), RPC-1/4IN.1040A (Conbraco Industries Inc R-P and C Valve Div).

What NSN replaces 4820-01-041-6939?

There are 5 known substitutes for 4820-01-041-6939: 5340-00-473-9022, 6630-00-672-9357, 6145-01-390-0117 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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