PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

65994Ring,retaining

Textron Lycoming Inc Williamsport Plant · NSN 5325-00-662-9833 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-662-9833 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-662-9833. Primary manufacturer part number: 65994.
Features
  • Ring,retaining — FSC 5325
  • Material Diameter: 0.037 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN
  • Casehardening Indicator: NOT CASEHARDENED
  • Outside Diameter: 3.657 INCHES MINIMUM AND 3.688 INCHES MAXIMUM IN
  • Material: STEEL
  • Usage Design: INTERNAL AND EXTERNAL
  • Cross-Sectional Shape Style: ROUNDED CORNERS
  • Inside Diameter: 3.407 INCHES MINIMUM AND 3.438 INCHES MAXIMUM IN
Applications
  • Applications requiring Steel construction
General Description

The Ring,retaining, cataloged under National Stock Number 5325-00-662-9833, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Textron Lycoming Inc Williamsport Plant. Government technical data includes 10 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
NSN5325-00-662-9833
Primary Part Number65994
Item NameRing,retaining
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerTextron Lycoming Inc Williamsport Plant
StatusACTIVE
Material Diameter0.037 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN
Casehardening IndicatorNOT CASEHARDENED
Outside Diameter3.657 INCHES MINIMUM AND 3.688 INCHES MAXIMUM IN
MaterialSTEEL
Usage DesignINTERNAL AND EXTERNAL
Cross-Sectional Shape StyleROUNDED CORNERS
Inside Diameter3.407 INCHES MINIMUM AND 3.438 INCHES MAXIMUM IN
Material Hardness Rating43.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
Ring StyleSTRAIGHT GAP
End StyleVERTEX OUTSIDE PERIPHERY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5930-00-629-6660695683-3 INTERCHANGEABLE
Switch,pressure
Lockheed Martin Corp
Cross-Reference Index
Part NumberManufacturer
65994 PRIMARY Textron Lycoming Inc Williamsport Plant (USA)
65994 Satair A/s (DNK)
Related Parts
5930-00-629-6660INTERCHANGEABLE
SWITCH,PRESSURE
695683-3

Frequently Asked Questions

What is NSN 5325-00-662-9833?

NSN 5325-00-662-9833 is a Ring,retaining, manufactured by Textron Lycoming Inc Williamsport Plant, classified under FSC 5325 (No Item Name Available). Status: active.

What are the part numbers for NSN 5325-00-662-9833?

NSN 5325-00-662-9833 has 2 cross-referenced part numbers: 65994 (Textron Lycoming Inc Williamsport Plant), 65994 (Satair A/s).

What NSN replaces 5325-00-662-9833?

There is 1 known substitute for 5325-00-662-9833: 5930-00-629-6660. Verify interchangeability with system specifications before substitution.

What are the specifications of 65994?

Key specifications for 65994: Material Diameter: 0.037 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN; Casehardening Indicator: NOT CASEHARDENED; Outside Diameter: 3.657 INCHES MINIMUM AND 3.688 INCHES MAXIMUM IN; Material: STEEL. 10 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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