PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

773-644Head,coupling

Hardie-Tynes Co., Inc. · NSN 2825-01-259-8011 · FSC 2825 · No Item Name Available
Verified by PartsTable
NSN 2825-01-259-8011 — this item is cataloged by the U.S. Government under National Stock Number 2825-01-259-8011. Primary manufacturer part number: 773-644.
Features
  • Head,coupling — FSC 2825
  • 3 verified cross-references
  • Primary manufacturer: Hardie-Tynes Co., Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Head,coupling, cataloged under National Stock Number 2825-01-259-8011, is classified within Federal Supply Class 2825 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Hardie-Tynes Co., Inc.. This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameHead,coupling
FSC / FSG2825 — No Item Name Available (FSG 28)
ManufacturersHardie-Tynes Co., Inc. (CAGE 27235)
Technical Specifications
ParameterValue
NSN2825-01-259-8011
Primary Part Number773-644
Item NameHead,coupling
FSC / FSG2825 / 28 — No Item Name Available
ManufacturerHardie-Tynes Co., Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
4820-01-258-9398 INTERCHANGEABLE
Seat,valve
3040-01-259-1605 INTERCHANGEABLE
Lever,remote Control
4820-01-259-5903 INTERCHANGEABLE
Guide,valve Stem
2825-01-259-8009591-582AP INTERCHANGEABLE
Guide Spacer
Acme Products & Engineering Inc
2825-01-259-8010591-583 INTERCHANGEABLE
Guide,tappet
Steward Machine Co Inc
5998-01-296-061777-3644 INTERCHANGEABLE
Circuit Card Assembly
Excelitas Technologies Corp. Dba Perkinelmer Inc
Cross-Reference Index
Part NumberManufacturer
773-644 Hardie-Tynes Co., Inc. (USA)
N60-773 PC644 Hardie-Tynes Co., Inc. (USA)
N60-773 Hardie-Tynes Co., Inc. (USA)
Related Parts
4820-01-258-9398INTERCHANGEABLE
SEAT,VALVE
3040-01-259-1605INTERCHANGEABLE
LEVER,REMOTE CONTROL
4820-01-259-5903INTERCHANGEABLE
GUIDE,VALVE STEM
2825-01-259-8009INTERCHANGEABLE
GUIDE SPACER
591-582AP
2825-01-259-8010INTERCHANGEABLE
GUIDE,TAPPET
591-583
5998-01-296-0617INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
77-3644

Frequently Asked Questions

What is NSN 2825-01-259-8011?

NSN 2825-01-259-8011 is a Head,coupling, manufactured by Hardie-Tynes Co., Inc., classified under FSC 2825 (No Item Name Available). Status: active.

What are the part numbers for NSN 2825-01-259-8011?

NSN 2825-01-259-8011 has 3 cross-referenced part numbers: 773-644 (Hardie-Tynes Co., Inc.), N60-773 PC644 (Hardie-Tynes Co., Inc.), N60-773 (Hardie-Tynes Co., Inc.).

What NSN replaces 2825-01-259-8011?

There are 6 known substitutes for 2825-01-259-8011: 4820-01-258-9398, 3040-01-259-1605, 4820-01-259-5903 and 3 more. Verify interchangeability with system specifications before substitution.

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