PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A329Isolator Valve Assembly

Ausco Inc · NSN 4820-01-268-8004 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-268-8004 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-268-8004. Primary manufacturer part number: A329.
Features
  • Isolator Valve Assembly — FSC 4820
  • General Characteristics Item Description: OPR. TEMP; M65.0 TO P160.0 DEG F; OPR. PRESSURE: 3000 PSIG; FLUIDS: MIL-H-5606 AND MIL-H-83282 DEGF
  • 5 verified cross-references
  • Primary manufacturer: Ausco Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Isolator Valve Assembly, cataloged under National Stock Number 4820-01-268-8004, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ausco Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-268-8004
Primary Part NumberA329
Item NameIsolator Valve Assembly
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAusco Inc
StatusACTIVE
General Characteristics Item DescriptionOPR. TEMP; M65.0 TO P160.0 DEG F; OPR. PRESSURE: 3000 PSIG; FLUIDS: MIL-H-5606 AND MIL-H-83282 DEGF
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-31073876 INTERCHANGEABLE
Cone and Rollers,tapered Roller
Rbc Bearings Incorporated Div West Trenton Division
6515-00-334-490021-0011 INTERCHANGEABLE
Forceps,hemostatic
Biomet Microfixation, Llc Div Biomet Microfixation
1680-00-536-2319 INTERCHANGEABLE
Spacer,ejection Sea
4730-00-873-3885SAE J512 8-8 010101BA INTERCHANGEABLE
Nipple,tube
Sae International Dba Sae International
5905-00-919-0159U39-100 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Clarostat Sensors and Controls
5930-01-121-76392-10011 INTERCHANGEABLE
Switch,electrical
Data Check Dba Lavi Systems, Inc. Div Data Check
5331-01-123-3719 INTERCHANGEABLE
O-Ring
5310-01-193-9222 INTERCHANGEABLE
Nut,plain,hexagon
5360-01-206-4924210-011 INTERCHANGEABLE
Spring
Hydro-Test Products, Inc. Dba Hydro-Test Products Inc
5331-01-406-4653A329 INTERCHANGEABLE
O-Ring
John G Papailias Co Inc Dba J G Papailias
Cross-Reference Index
Part NumberManufacturer
65126-11359 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA)
AAEX0314500B The Lee Co Dba the Lee Co (USA)
65126-11359-101 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA)
A329 PRIMARY Ausco Inc (USA)
21001-1 Nutek Aerospace Corp (USA)
Related Parts
3110-00-100-3107INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
3876
6515-00-334-4900INTERCHANGEABLE
FORCEPS,HEMOSTATIC
21-0011
1680-00-536-2319INTERCHANGEABLE
SPACER,EJECTION SEA
4730-00-873-3885INTERCHANGEABLE
NIPPLE,TUBE
SAE J512 8-8 010101BA
5905-00-919-0159INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
U39-100
5930-01-121-7639INTERCHANGEABLE
SWITCH,ELECTRICAL
2-10011
5331-01-123-3719INTERCHANGEABLE
O-RING
5310-01-193-9222INTERCHANGEABLE
NUT,PLAIN,HEXAGON
5360-01-206-4924INTERCHANGEABLE
SPRING
210-011
5331-01-406-4653INTERCHANGEABLE
O-RING
A329
6695-01-416-6284INTERCHANGEABLE
TRANSDUCER,MOTIONAL PICKUP
A-329
6515-01-422-4567INTERCHANGEABLE
SCISSORS,MICROSURGICAL
2.10011

Frequently Asked Questions

What is NSN 4820-01-268-8004?

NSN 4820-01-268-8004 is a Isolator Valve Assembly, manufactured by Ausco Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-268-8004?

NSN 4820-01-268-8004 has 5 cross-referenced part numbers: 65126-11359 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), AAEX0314500B (The Lee Co Dba the Lee Co), 65126-11359-101 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), A329 (Ausco Inc), 21001-1 (Nutek Aerospace Corp).

What NSN replaces 4820-01-268-8004?

There are 12 known substitutes for 4820-01-268-8004: 3110-00-100-3107, 6515-00-334-4900, 1680-00-536-2319 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A329?

Key specifications for A329: End Item Identification: ACFT CH-53E; General Characteristics Item Description: OPR. TEMP; M65.0 TO P160.0 DEG F; OPR. PRESSURE: 3000 PSIG; FLUIDS: MIL-H-5606 AND MIL-H-83282 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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