PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9966Valve,regulating,temperature

Mechanical Systems Support Co Inc · NSN 4820-01-343-0527 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-343-0527 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-343-0527. Primary manufacturer part number: 9966.
Features
  • Valve,regulating,temperature — FSC 4820
  • Material: COPPER ALLOY BODY
  • Temp Rating: 400.0 FAHRENHEIT MAXIMUM DEGF
  • 1 verified cross-reference
  • Primary manufacturer: Mechanical Systems Support Co Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Body construction
General Description

The Valve,regulating,temperature, cataloged under National Stock Number 4820-01-343-0527, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Mechanical Systems Support Co Inc. Government technical data includes 2 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-343-0527
Primary Part Number9966
Item NameValve,regulating,temperature
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerMechanical Systems Support Co Inc
StatusACTIVE
MaterialCOPPER ALLOY BODY
Temp Rating400.0 FAHRENHEIT MAXIMUM DEGF
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5315-00-010-3728 INTERCHANGEABLE
Pin,straight,headless
5120-00-112-93715120-00-112-9371 INTERCHANGEABLE
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General Services Administration Federal Supply Service
5935-00-114-88457314C INTERCHANGEABLE
Connector,plug,electrical
Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division
6145-00-171-0821 INTERCHANGEABLE
Cable,special Purpose,electrical
4320-00-671-3270996-6 INTERCHANGEABLE
Ram,jack,hydraulic
Columbus Jack Corporation Div Columbus Jack
5950-01-076-178812272678 INTERCHANGEABLE
Reactor
U S Army Tank Automotive Command Amsta-Im-Mm
5955-01-160-7421712732-4 INTERCHANGEABLE
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Raytheon Company Div Rmd Strategic
4820-01-201-26569969G51M INTERCHANGEABLE
Valve,safety Relief
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
6520-01-570-5427CR1024 INTERCHANGEABLE
Cap,lens,curing Light,dental
Discus Dental Llc
Cross-Reference Index
Part NumberManufacturer
9966 PRIMARY Mechanical Systems Support Co Inc (USA)
Related Parts
5315-00-010-3728INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
5120-00-112-9371INTERCHANGEABLE
BIT,SCREWDRIVER
5120-00-112-9371
5935-00-114-8845INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
7314C
6145-00-171-0821INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
4320-00-671-3270INTERCHANGEABLE
RAM,JACK,HYDRAULIC
996-6
5950-01-076-1788INTERCHANGEABLE
REACTOR
12272678
5955-01-160-7421INTERCHANGEABLE
CRYSTAL UNIT,QUARTZ
712732-4
4820-01-201-2656INTERCHANGEABLE
VALVE,SAFETY RELIEF
9969G51M
6520-01-570-5427INTERCHANGEABLE
CAP,LENS,CURING LIGHT,DENTAL
CR1024

Frequently Asked Questions

What is NSN 4820-01-343-0527?

NSN 4820-01-343-0527 is a Valve,regulating,temperature, manufactured by Mechanical Systems Support Co Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-343-0527?

NSN 4820-01-343-0527 has 1 cross-referenced part number: 9966 (Mechanical Systems Support Co Inc).

What NSN replaces 4820-01-343-0527?

There are 9 known substitutes for 4820-01-343-0527: 5315-00-010-3728, 5120-00-112-9371, 5935-00-114-8845 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 9966?

Key specifications for 9966: Material: COPPER ALLOY BODY; Temp Rating: 400.0 FAHRENHEIT MAXIMUM DEGF. 2 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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