PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AC250SExpander,piston Ring

Cornwell Quality Tools Company, the · NSN 5120-00-393-0549 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-393-0549 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-393-0549. Primary manufacturer part number: AC250S.
Features
  • Expander,piston Ring — FSC 5120
  • Ring Diameter Accommodated: 1.125 INCHES NOMINAL IN
  • 3 verified cross-references
  • Primary manufacturer: Cornwell Quality Tools Company, the
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Expander,piston Ring, cataloged under National Stock Number 5120-00-393-0549, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Cornwell Quality Tools Company, the. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 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.

Technical Specifications
ParameterValue
NSN5120-00-393-0549
Primary Part NumberAC250S
Item NameExpander,piston Ring
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerCornwell Quality Tools Company, the
StatusCANCELLED
Ring Diameter Accommodated1.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5306-01-074-6817CL-25-EB INTERCHANGEABLE
Bolt,eye
Carr Lane Manufacturing Co
Cross-Reference Index
Part NumberManufacturer
AC250S PRIMARY Cornwell Quality Tools Company, the (USA)
RE250 Cornwell Quality Tools Company, the (USA)
616 Bosch Automotive Service Solutions Inc. (USA)
Related Parts
5306-01-074-6817INTERCHANGEABLE
BOLT,EYE
CL-25-EB

Frequently Asked Questions

What is NSN 5120-00-393-0549?

NSN 5120-00-393-0549 is a Expander,piston Ring, manufactured by Cornwell Quality Tools Company, the, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-393-0549?

NSN 5120-00-393-0549 has 3 cross-referenced part numbers: AC250S (Cornwell Quality Tools Company, the), RE250 (Cornwell Quality Tools Company, the), 616 (Bosch Automotive Service Solutions Inc.).

What NSN replaces 5120-00-393-0549?

There is 1 known substitute for 5120-00-393-0549: 5306-01-074-6817. Verify interchangeability with system specifications before substitution.

What are the specifications of AC250S?

Key specifications for AC250S: Ring Diameter Accommodated: 1.125 INCHES NOMINAL IN. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-393-0549 still in active supply?

NSN 5120-00-393-0549 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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