HARFINGTON 10pcs Knurled Clamping Knobs Thumb Screws M4 x 12mm Metric Male Thread 13mm Matte Plastic Head 304 Stainless Steel Stud Hand Threaded Knob Thumbscrew Handle, Black M4 x 12mm x 13mm healthJAPAN_March2024 can't be opened once locked

can't be opened once locked

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HARFINGTON 10pcs Knurled Clamping Knobs Thumb Screws M4 x 12mm Metric Male Thread 13mm Matte Plastic Head 304 Stainless Steel Stud Hand Threaded Knob Thumbscrew Handle, Black M4 x 12mm x 13mm healthJAPAN_March2024 can't be opened once lockedHARFINGTON 10pcs Knurled Clamping Knobs Thumb Screws M4 x 12mm Metric Male Thread 13mm Matte Plastic Head 304 Stainless Steel Stud Hand Threaded Knob Thumbscrew Handle, Black Product Features Size Standard metric thread size: M4 (0. 7mm pitch); thread length: 12mm 0. 47"; head size: 13mm x 8mm 0. 51" x 0. 31" (D*T); step size: 10mm x 2mm 0. 39" x 0. 08" (d*t); total length: 22mm 0. 87"; color: black; knob style: knurled Material 304 stainless steel