PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ST25Compressor,valve Spring

Textron Lycoming Inc Williamsport Plant · NSN 5120-00-534-0631 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-534-0631 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-534-0631. Primary manufacturer part number: ST25.
Features
  • Compressor,valve Spring — FSC 5120
  • 2 verified cross-references
  • Primary manufacturer: Textron Lycoming Inc Williamsport Plant
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Mechanical energy storage
  • Vibration dampening
General Description

The Compressor,valve Spring, cataloged under National Stock Number 5120-00-534-0631, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Textron Lycoming Inc Williamsport Plant. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameCompressor,valve Spring
FSC / FSG5120 — No Item Name Available (FSG 51)
ManufacturersTextron Lycoming Inc Williamsport Plant (CAGE 80254); Satair A/s (CAGE R1120)
Technical Specifications
ParameterValue
NSN5120-00-534-0631
Primary Part NumberST25
Item NameCompressor,valve Spring
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerTextron Lycoming Inc Williamsport Plant
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5965-00-224-6029SCD602ST25 INTERCHANGEABLE
Harness,chest Set
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
Cross-Reference Index
Part NumberManufacturer
ST25 PRIMARY Textron Lycoming Inc Williamsport Plant (USA)
ST25 Satair A/s (DNK)
Related Parts
5965-00-224-6029INTERCHANGEABLE
HARNESS,CHEST SET
SCD602ST25

Frequently Asked Questions

What is NSN 5120-00-534-0631?

NSN 5120-00-534-0631 is a Compressor,valve Spring, manufactured by Textron Lycoming Inc Williamsport Plant, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-534-0631?

NSN 5120-00-534-0631 has 2 cross-referenced part numbers: ST25 (Textron Lycoming Inc Williamsport Plant), ST25 (Satair A/s).

What NSN replaces 5120-00-534-0631?

There is 1 known substitute for 5120-00-534-0631: 5965-00-224-6029. Verify interchangeability with system specifications before substitution.

Is NSN 5120-00-534-0631 still in active supply?

NSN 5120-00-534-0631 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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