British Standard Size. 1/4 Inches thread diameter, 1.95 inches length in thread. 2 inches length of the rod, 2.5 inches overall length Made of high grade Nylon. These Nylon Thumb Screws offer insulation(non-conductivity), corrosion resistance and chemical stability. Fine plastics injection ensures an accurate size and perfect shape in these thumb screw bolt. Easy Installation. Ergonomic design spade handle makes the tweaking work much more easier, and tighter. Application. was dedicated to providing various thumb screws for your RC Model Airplane, Aircraft, Boat or Car. 1/4" x 2 inches Nylon Thumb ScrewThread Diameter: 1/4 inches(British Standard Thread)Length of the Thread: 1.95 inchesRod Length: 2 inchesOverall Length: 2.5 inchesMaterials: NylonThumb Screw Type: SpadeApplication: Fastener for RC Model Airplane, Car, BoatPackage Content:5 Pcs 1/4" x 2 inches Nylon Thumb Screw