Grade 12.9 High Strength Bolt Flat Washer, Spring Washer Set

All bolts and washers are zinc plated.

Manufactured and supplied directly in Korea.

We added the spring washer and flat washer thickness when designing the bolt, so we adjusted the length to the original bolt installation size.

This product is provided with reinforced bolts according to the Ford Explorer Recall. (Grade 10.9->12.9)

It is exactly compatible with JXB Performance's insert bushing, and we have received a definite answer from JXB Performance's headquarters that there is no verification or problem with this.
Therefore, North American customers can purchase insert bushings from JXB Performance, and European customers can contact us to provide insert bushing and bolt sets.

Advantages of installing with JXB Performance:
1. Unstable shifting at low speeds (0~50Km) is smoothed.
2. Shift shock is reduced when shifting to reverse gear.

Required Tools:
18mm Socket
12mm Allen Socket

Installation Guide.
When installing bolts, apply Blue Loctite if possible to secure them.
The fixing torque is 120 ftlbs.
Please be careful not to exceed the fixing torque as the threads of the rear differential cover may be damaged.
This product includes a high-tension spring washer to prevent loosening as much as possible.

Product delivery information.
Due to U.S. government customs policy, EMS shipping to the United States will be discontinued starting August 24, 2025. Therefore, shipping to the United States will be via the eBayGS shipping program. For Europe and other countries, EMS shipping is available only to countries with lower-cost options, including: Australia, Brazil, Canada, France, Germany, Hong Kong, Indonesia, Japan, Malaysia, New Zealand, Philippine, Singapore, Spain, Taiwan, Thailand, United Kingdom, and Vietnam.
For countries other than these, please contact us separately to learn about the updated shipping costs and to create a separate sales page.

Information for US Customers
Due to US import duties, customers are responsible for paying additional duties to the US government.
Therefore, the shipping cost includes the duties in the price.


Korea Auto Parts is the Korean sales dealer for JXB Performance, USA.