# Dichtomatik ST221 PTFE Single Turn Split Backup Ring - Anti-Extrusion Ring for O-Ring Support - MROSupply.com

***Dichtomatik ST221 PTFE single turn split backup ring prevents O-ring extrusion in high-pressure static and dynamic sealing applications. PTFE offers broad chemical compatibility and a temperature range of -100°F to +500°F. Suitable for hydraulic and pneumatic systems requiring reliable anti-extrusion performance.***



## Product details:

- Catalog number: 75089425
- SKU: 2806150
- Price: ***$1.79*** Each
- Quantity: This vendor has a minimum order quantity of
30.Order minimum ($) may be applied.
Add desired QTY to cart and proceed to checkout to view minimum'

- Brand Minimum Order Quantity - 30
(This is the minimum order quantity if ordering this unit alone
from the vendor. Adding other products from the same vendor will reduce
the overall requirement. If adding multiple products from same vendor,
please add all products to cart to see total minimum.)
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Dichtomatik](https://www.mrosupply.com/brands/dichtomatik/)
- Category: 
    - [Standard Flat Back-Up Rings](htts://www.mrosupply.com/seals/back-up-rings/standard-flat-back-up-rings/)
    - [Back-Up Rings](htts://www.mrosupply.com/seals/back-up-rings/)
    - [Seals](htts://www.mrosupply.com/seals/)
- Unit of measure: each
- Weight: 0.002 lb
- Technicall support: contact supplier for technical support on 800 328 2840


## Product images:
- https://static.mrosupply.com/images/noimage.webp


## Product attributes;

  
- Dash Number: 221
  

  
- Domestic/Import: Import
  

  
- I.D.: 1-7/16 in
  

  
- Material: PTFE
  

  
- O.D.: 1-5/8 in
  

  
- Temperature Rating: -65 to 500 deg F
  

  
- Thickness: 0.029 in
  

  
- Type: 1-Turn
  

  
- Width: 0.122 in
  


## Product's reviews:
- A+ - Perfect fit, my boat trailer back in the water.
- Fast shipping - Order was filled quickly. Product was as described and packaging was good.
- Awesome - works grate
- My new supplier - Thanks for your help with finding the seals I needed.
You were fast and reasonable with the shipping, The price was also good, your communications before and after the sale was very appreciated again thanks for your help I will be back!!! Steve G