1/4-20 UNC Nylon Insert Hex Lock Nuts, 304 Stainless Steel, Plain Finish, 50pcs M12 X 80mm 2 Pcs x Adjustable Clamping

2 Pcs x Adjustable Clamping Handle

10 x carbon Film Potentiometer

For 16mm (5/8") outer diameter copper pipe

Internal Size: 100x100mm/4"x4"(L*W)

it will leave a trace

1/4-20 UNC Nylon Insert Hex Lock Nuts, 304 Stainless Steel, Plain Finish, 50pcs M12 X 80mm 2 Pcs x Adjustable Clamping1. Nylon insert lock nut, polymer insert lock nut, or elastic stop nut, is a kind of locknut. 2. It is a nut with a nylon insert that resists turning. 3. The plastic insert is placed at the end of the nut, and its inner diameter (ID) is slightly smaller than the diameter of the screw. 4. The inserts deform elastically over the threads of the screw, but threads are not cut into the nylon. Specification: Material: 304 Stainless Steel Thread Size: 1 4 20