# Martin M 4 3/8 QD Bushing Type M 4-3/8" Bore Cast Iron - MROSupply.com

***Martin M 4 3/8 Type M Quick Disconnect bushing with 4-3/8" bore, cast iron construction, and 1" x 1/2" keyway. Industry-interchangeable QD bushing for high-torque power transmission applications. Requires M-size QD hub (sold separately).***



## Product details:

- Catalog number: M 4 3/8
- SKU: 247772
- Price: ***$590.20*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Martin Sprocket](https://www.mrosupply.com/brands/martin-sprocket/)
- Category: 
    - [Type M](htts://www.mrosupply.com/bushings/quick-disconnect-bushings/type-m/)
    - [Quick Disconnect Bushings](htts://www.mrosupply.com/bushings/quick-disconnect-bushings/)
    - [Bushings](htts://www.mrosupply.com/bushings/)
- Unit of measure: each
- Weight: 41.220 lb
- Technicall support: contact supplier for technical support on 323-728-8117


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


## Product attributes;

  
- Bore Size: 4-3/8"
  

  
- Keyway: 1" x 1/2"
  

  
- Material: Cast Iron
  

## Alternate products to `Martin M 4 3/8 QD Bushing Type M 4-3/8" Bore Cast Iron - MROSupply.com`:
- [Dodge 119927 Type M Quick Disconnect (QD) bushing with 4-3/8" finished bore and 1" x 1/2" keyway. Ductile iron construction provides high strength and durability for demanding power transmission applications. QD design enables fast, secure shaft mounting and easy removal without disturbing other components. Suitable for use with QD sheaves, sprockets, and pulleys in industrial drive systems.](https://www.mrosupply.com/products/118768/as-markdown/)
- [TB Woods M438 Sure-Grip QD bushing in the M series with a 4-3/8" finished bore. Cast-iron body with standard ANSI keyway and four 3/4-10 capscrews, rated for 125,000 in-lb torque capacity. Designed for the industry-standard QD interface on sheaves, sprockets, and couplings.](https://www.mrosupply.com/products/337896/as-markdown/)

## Product's reviews:
- Great prices and quality products - Your products are not only affordable, but they are also priced very fairly and competitively & always ship out pretty quickly. You have gained a new regular customer and stolen us from one of our regular distributors without even trying. Thank you for being awesome! Not to mention the free shipping over $100 perk is super appreciated as we not only are saving money per item, but we are also able to buy in bulk without the additional burden of freight/shipping costs.
THANK YOU!! :)
- Good stock - I was pleased with the help of customer service to answer my questions concerning inventory and how quickly I received my product. Thank you.
- Plate gear - Just what I ordered at a reasonable price. Thank you, Dallas
- Bushing - PROMPT SHIPPING AND WELL PACKAGED. THANKS