PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

203-27ARing,retaining

Ontic Engineering & Manufacturing, Inc Dba Ontic Us · NSN 5325-00-166-6113 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-166-6113 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-166-6113. Primary manufacturer part number: 203-27A.
Features
  • Ring,retaining — FSC 5325
  • Ring Style: OFFSET
  • Casehardening Indicator: NOT CASEHARDENED
  • Material: STEEL
  • Inside Diameter: 1.394 INCHES MINIMUM AND 1.413 INCHES MAXIMUM IN
  • Cross-Sectional Shape Style: ROUND
  • Outside Diameter: 1.520 INCHES MINIMUM AND 1.535 INCHES MAXIMUM IN
  • Usage Design: INTERNAL AND EXTERNAL
Applications
  • Applications requiring Steel construction
General Description

The Ring,retaining, cataloged under National Stock Number 5325-00-166-6113, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). 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: Active.

Technical Specifications
ParameterValue
NSN5325-00-166-6113
Primary Part Number203-27A
Item NameRing,retaining
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerOntic Engineering & Manufacturing, Inc Dba Ontic Us
StatusACTIVE
Ring StyleOFFSET
Casehardening IndicatorNOT CASEHARDENED
MaterialSTEEL
Inside Diameter1.394 INCHES MINIMUM AND 1.413 INCHES MAXIMUM IN
Cross-Sectional Shape StyleROUND
Outside Diameter1.520 INCHES MINIMUM AND 1.535 INCHES MAXIMUM IN
Usage DesignINTERNAL AND EXTERNAL
Major Thickness0.061 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
3455-00-240-731813220 INTERCHANGEABLE
Cutter,milling,angle
Niagara Cutter Inc
Cross-Reference Index
Part NumberManufacturer
203-27A PRIMARY Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA)
203-27A Donallco Inc (USA)
Related Parts
3455-00-240-7318INTERCHANGEABLE
CUTTER,MILLING,ANGLE
13220

Frequently Asked Questions

What is NSN 5325-00-166-6113?

NSN 5325-00-166-6113 is a Ring,retaining, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 5325 (No Item Name Available). Status: active.

What are the part numbers for NSN 5325-00-166-6113?

NSN 5325-00-166-6113 has 2 cross-referenced part numbers: 203-27A (Ontic Engineering & Manufacturing, Inc Dba Ontic Us), 203-27A (Donallco Inc).

What NSN replaces 5325-00-166-6113?

There is 1 known substitute for 5325-00-166-6113: 3455-00-240-7318. Verify interchangeability with system specifications before substitution.

What are the specifications of 203-27A?

Key specifications for 203-27A: Ring Style: OFFSET; Casehardening Indicator: NOT CASEHARDENED; Material: STEEL; Inside Diameter: 1.394 INCHES MINIMUM AND 1.413 INCHES MAXIMUM IN. 8 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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