Piano stool screw mechanism 2024

Piano stool mechanism
It is a screw mechanism for making a stool or a chair. It is made of steel. It consists of two parts a nut and a screw. Also, there is anti-twisting detail, which prevents sudden disconnection of the seat from the stool.
Size: length of a crew - 250mm ~(10 inches)
Length of a nut - 50mm ~ (2 inches)
Diameter of a srew disk - 120mm ~ (5 inches)
Diameter of a nut disk - 60mm (2.3 inches)
Detailed sizes you can see on photo 7.
IMPORTANT
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