PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3400-0073Valve,unitized,assembly

Lear Siegler Inc Hypro Div · NSN 4320-00-989-0536 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-989-0536 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-989-0536. Primary manufacturer part number: 3400-0073.
Features
  • Valve,unitized,assembly — FSC 4320
  • General Characteristics Item Description: CONSISTS OF 1 SEAT,1 DISK,1 SPRING,1 O-RING,1 RETAINER,BODY PLASTIC W/STEEL FACE,15/16 IN. OD,13/32 IN. ID,5/8 IN. LG IN
  • 3 verified cross-references
  • Primary manufacturer: Lear Siegler Inc Hypro Div
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,unitized,assembly, cataloged under National Stock Number 4320-00-989-0536, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Lear Siegler Inc Hypro Div. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-989-0536
Primary Part Number3400-0073
Item NameValve,unitized,assembly
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerLear Siegler Inc Hypro Div
StatusACTIVE
General Characteristics Item DescriptionCONSISTS OF 1 SEAT,1 DISK,1 SPRING,1 O-RING,1 RETAINER,BODY PLASTIC W/STEEL FACE,15/16 IN. OD,13/32 IN. ID,5/8 IN. LG IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
6850-00-009-8246A768 INTERCHANGEABLE
Lubricant,antiseize
The B G Service Company, Inc.
6710-00-601-2814340049 INTERCHANGEABLE
Body Section,front
Hamilton Sundstrand Corporation Div Mission Systems
3120-01-058-1464 INTERCHANGEABLE
Bearing,stern Tube
5962-01-378-3129ADVFC32SH/883B INTERCHANGEABLE
Microcircuit,linear
Analog Devices, Inc. Div Corporate Headquarters
Cross-Reference Index
Part NumberManufacturer
3400-49 Lear Siegler Inc Hypro Div (USA)
A768 Lear Siegler Inc Hypro Div (USA)
3400-0073 PRIMARY Lear Siegler Inc Hypro Div (USA)
Related Parts
6850-00-009-8246INTERCHANGEABLE
LUBRICANT,ANTISEIZE
A768
6710-00-601-2814INTERCHANGEABLE
BODY SECTION,FRONT
340049
3120-01-058-1464INTERCHANGEABLE
BEARING,STERN TUBE
5962-01-378-3129INTERCHANGEABLE
MICROCIRCUIT,LINEAR
ADVFC32SH/883B

Frequently Asked Questions

What is NSN 4320-00-989-0536?

NSN 4320-00-989-0536 is a Valve,unitized,assembly, manufactured by Lear Siegler Inc Hypro Div, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-989-0536?

NSN 4320-00-989-0536 has 3 cross-referenced part numbers: 3400-49 (Lear Siegler Inc Hypro Div), A768 (Lear Siegler Inc Hypro Div), 3400-0073 (Lear Siegler Inc Hypro Div).

What NSN replaces 4320-00-989-0536?

There are 4 known substitutes for 4320-00-989-0536: 6850-00-009-8246, 6710-00-601-2814, 3120-01-058-1464 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3400-0073?

Key specifications for 3400-0073: General Characteristics Item Description: CONSISTS OF 1 SEAT,1 DISK,1 SPRING,1 O-RING,1 RETAINER,BODY PLASTIC W/STEEL FACE,15/16 IN. OD,13/32 IN. ID,5/8 IN. LG IN. 1 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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