Star Grip Knob, M8, Int, 0.98, 1.57, K: Amazon.com: Tools & Home Improvement
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6331 BT.16 FP-M4 Elesa Fluted Grip Knob w/ Tapped Through Hole Threaded M4 — Steel City Supply
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WoodRiver - TPR Grip Knob - 3/8"
Kipp #10-32x20 Thread, 25 mm Diameter, Star Grip Knob, Plastic with Steel External Thread, Style L - Red (10/Pkg.), K0155.4A16X20 | AFT Fasteners
5/16-18 Thread Male Sure-Grip Knob - Lee Valley Tools