1/4"-20 x 1/2" Thumb Screw Stainless Steel - Black Knurled Round Plastic Knob - Standard/Coarse Thread Thumbscrew - Length: 0.500" - Proudly Built in USA - Package of (4) 4 sold2026 Keeping your spark plugs in

Keeping your spark plugs in top shape is essential for your car’s operation

Quality Material: Made of high-quality cotton cloth with soft surface and high grinding efficiency

Flame retardant and weather resistant

Three different drawing surfaces to help bring your imagination to life

1/4"-20 x 1/2" Thumb Screw Stainless Steel - Black Knurled Round Plastic Knob - Standard/Coarse Thread Thumbscrew - Length: 0.500" - Proudly Built in USA - Package of (4) 4 sold2026 Keeping your spark plugs in1 4" 20 x 1 2" Thumb Screw Stainless Steel Black Knurled Round Plastic Knob Standard Coarse Thread Thumbscrew Length: 0. 500" Proudly Built in USA Package of (4) Thumb Screw Specs: Thread Diameter: 0. 250" (1 4") Thread Pitch: 20 (UNC) Screw Length: 0. 500" (1 2") Fully Threaded: Yes Minimum Thread Length: Full Thread Material: 18 8 Stainless Steel Knob Style: Knurled Round Knob Color: Black Knob Diameter: 0. 750" (3 4") Knob Height: 0. 313" (5 16")