Specification:Product Name: Hexagonal Plum Clamping Knob NutsMaterial: Nylon + Galvanized Carbon SteelColor: BlackFemale Thread Type: 1/4 - 20Head Diameter: 1.26 / 32mmTotal Height: 0.51 / 13mmPackage Details:4 × Star Knob Handle1. Handle nut made of nylon and metal, good toughness, strong anti-aging ability, strong structure, not easy to deformation, smooth surface, can provide comfortable grip.2. Easy to install, beautiful surface, comfortable grip.3. Widely used for lathe machine, mechanical equipment, instrument and apparatus, food and pharmaceutical industry equipment.NotePlease allow 1-3mm error due to manual measurement.Please allow for slight color difference due to different monitors. 【Premium Material】Made of high quality nylon and galvanized carbon steel, reliable, good toughness, strong anti-aging ability, smooth and beautiful, long service life. 【Easy to Control】Star shaped design, well-made, accord to ergonomic, comfortable hand grip and non-slip without scratching hands. 【Size】Female thread type: 1/4 -20, Thread diameter: 1/4 inch (0.25 /6.35mm), Teeth per inch: 20 teeth, Pitch: 0.05 in (approx. 1.27 mm); Head diameter: 1.10 inch/28mm; Total height: 0.50 inch/12.7mm. 【Application】Widely used for lathe machine, mechanical equipment, instrument and apparatus, food and pharmaceutical industry equipment. It can be used in drill press, lathes, fixture, feather board and fences, and other places where 1/4 inch female thread is needed. 【Package Included】4 × 1/4 -20 Star Knob Handle. Color: Black; Brand Aifeier ET Color Black Set Name Set of 4 Size Name 1/4 - 20 Metal Type Brass Unit Count 4.0 Count Drive Style Star Item Weight 4.54 g Part Number KNOB-HANDLE-1420-4P Thread Size 1/4 -20 Thread Type 1/4-20 Unc Finish Types Polished Grade Rating aerospace Manufacturer Aifeier ET Thread Class Coarse Thread Style Right Hand Fastener Type Hex Item Diameter 1.26 Inches Material Type Nylon Exterior Finish Stainless Steel Item Dimensions 1.22 x 1.22 x 0.51 inches Number Of Items 4 Thread Coverage Fully Threaded Number of Pieces 4 Outside Diameter 1.26 Inches Screw Head Style Star Inside Thread Size ¼ INCH Compatible Groove Diameter 0.25 Inches