Black Thumb Screws with Rosette Fluted Head - 3/8-16 x 2 Clamping Knobs - Knurled Thumb Screw - SS Thumb Screw Black Thumbscrews Knurled Knob Screw Thumbscrew (4)

38 x 2 Thumb Screws with Fluted Round Head - Knurled Knob - Knurled Clamping Knobs Grip Thumb Screw - Male with Fluted Rosette - 38-16 Thumb Screw - Black Clamping Knobs With Large Fluted Head - Fluted Knobs With Male Stud - Fluted Knobs 38 Bolt 38-16 Coarse Thread Premium quality - Made in USA The over sized round Fluted head is 1 12” in diameter. Thread Material – Stainless Steel Head Diameter: 1.5 Head Thickness: 38 Welcome to WBTAYB store. Your satisfaction is our priority. If WBTAYB are any questions before and after purchase please welcome to contact us we will try my best to solve all for you.