Seat cushion "NRT Washer II"

Easy visual confirmation of tightening! Responds to loosening due to wood shrinkage and other factors.

The "NRT Washer II" is a spring-function washer used for M12 bolt and nut fastening locations. It is a certified product by the Building Materials Testing Center, with a short-term allowable embedment resistance of 10.0 kN for coniferous trees, 8.6 kN for hinoki trees, and 6.7 kN for cedar trees, which is equivalent to or greater than the Z corner washer 4.5×40. Additionally, it is easy to confirm the fastening just by visually checking if the seating surface is flush. 【Features】 ■ Thin and lightweight ■ Prevents loosening with spring function and raised seating surface cut ■ Easy fastening confirmation *For more details, please refer to the catalog or feel free to contact us.

Support hardware/opening hardwareJoints between components