# Dichtomatik ST278S PTFE Backup Ring - Solid Anti-Extrusion Ring for High-Pressure Sealing - MROSupply.com

***Dichtomatik ST278S PTFE solid backup ring prevents O-ring extrusion in high-pressure static and dynamic sealing applications. PTFE backup rings offer excellent chemical resistance and a wide temperature range from -100°F to +500°F. Suitable for use in hydraulic and pneumatic systems where gap clearance requires anti-extrusion support.***



## Product details:

- Catalog number: 75027418
- SKU: 2812443
- Price: ***$75.73*** Each
- 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: 0.017 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: 278
  

  
- Domestic/Import: Import
  

  
- I.D.: 12 in
  

  
- Material: PTFE
  

  
- Temperature Rating: -65 to 500 deg F
  

  
- Type: Solid
  


## Product's reviews:
- Seals - Fast delivery, very resonable cost
- A+ - Perfect fit, my boat trailer back in the water.
- Dichtomatick order - Very reliable
- Great product easy ordering - Ordering was easy products were correct and all was a great experience