KEVN

The KEVN Rubber ID Tool
The KEVN Rubber ID Tool
(Kalrez-Epdm-Viton-Nitrile)
PACKAGED IN VIRTUALLY
UNBREAKABLE PLASTIC TUBE

KEVN

Quantity Pricing (ea)
  • 1 for $70.00
Stock & Availability (ea)
In Stock: 180
Inbound Stock: 0
Offsite Stock: 0
New Production: Unlimited
Expedited Shipping*: 08/24/2026
Standard Shipping: 10/13/2026
*Add your desired qty and click ADD TO CART to see expedite fees and options.

Additional information

Weight 0.17197 lbs
Shipping Dimensions 1.25 × 1.25 × 5.25 in

Description

The KEVN® O-Ring ID Tool

OVERVIEW

The KEVN® O-Ring ID Tool is a practical and useful device to assist in the identification of four (4) commonly used O-Ring rubber materials:

  • K
    ALREZ® – Perfluoroelastomer (FFKM)
  • E
    PDM – Ethylene Propylene Rubber (EPR)
  • V
    iton® – Fluorocarbon (FPM, FKM)
  • N
    itrile – Nitrile Rubber (Buna-N)

The KEVN® O-Ring ID Tool is calibrated to work best with the following:

  • 70 Durometer O-Rings
  • New & Unused O-Rings
  • O-Rings within their rated shelf life
  • Cross-sections starting with .103″ (2.62mm) up to .275″ (6.99mm), including the standard AS568 series (100, 200, 300, & 400 series).

WHERE AND WHEN TO USE

  • To verify an O-Ring just before installing in the equipment.
  • To differentiate between KNOWN O-Ring materials.
  • To check for mislabeled O-Rings.
  • To verify new O-Rings.
  • Sorting Applications.

INSTRUCTIONS FOR USE

1. Place the O-Ring on a stable, flat surface. Hold the KEVN® O-Ring ID Tool in a vertical position so that the
straight edge of the sliding weight hangs out the bottom of the steel tube.

2. Position the straight edge of the weight on the O-Ring’s cross-section and raise the weight all the way to the top of the tube (as far
as it will go).

3. Release the weight and let it drop onto the O-Ring. The weight will bounce. The height of the first bounce will rise to one of the four
calibrated ranges.

CAUTION-DO NOT USE FOR:

  • To identify or analyze a failed O-Ring
  • On damaged O-Rings
  • On O-Rings of unknown composition
  • On out-of-date O-Rings
  • On O-Ring cross-sections less than .103″(2.62mm), and greater than .275″(6.99mm)
  • To identify composition of flat gasket surfaces
  • On other than 70 Durometer O-Rings

DISCLAIMER:

The use of rubber elastomer marks such as Kalrez® & Viton® (which are registered trademarks of DuPont Elastomers) are for reference only, and
do not guarantee that the materials tested with this tool are from a particular manufacturer.