Samsung Q Speaker Rear Mount Thumb Screw Bolts Black Tee Wing Knob 4 Pack
1/4″-20 x 1 1/2″ Thumb Screw Bolts with Black Butterfly Tee Wing Clamping Knob. 1/4-20 x 1″ Thumb Screw T Bolts Black Butterfly Tee Wing Plastic Clamping Knob. Avoid Over-Tightening: Designers prefer thumb screws to reduce the risk of over-tightening, especially in delicate assemblies.