Vespel Hex Nut, 1/4"-20 (Pack of 5)

Most often used on machine screws and threaded rod, these general purpose nuts are for low-strength assemblies. Hex Nuts have flat tops with chamfered corners; bottoms may be flat or chamfered. Hex drive systems are driven with a wrench.Vespel is a high performance polyimide material, which can operate continuously from cryogenic temperatures to 550 degrees Fahrenheit, with excursions to 900 degrees Fahrenheit. Vespel parts exhibit superior performance in a variety of applications requiring low wear and long life in severe environments. Vespel, unlike most plastics, is non-flammable. Parts perform without melting or softening, and resist radiation sterilization more effectively than most other plastics. Vespel parts exhibit a very low level of outgassing, even in high vacuum environments, and are chemically compatible with most fuels, solvents, lubricants and hydraulic fluids. Vespel has above average tensile strength for a polymer, at 12,600 psi (pounds per square inch). Vespel will absorb 0.24% of its weight when exposed to water for 24 hours. Vespel is extremely impact resistant, rated at 14 foot pounds (on the Izod Impact Scale), which compares favorably against Nylon 6/6 at 3 foot pounds. Vespel also has excellent insulating properties, measured in terms of dielectric strength, with a rating of 260 volts/millimeter.A threaded fastener's size name includes information about the major external diameter, followed by the threads per inch, which indicates if it is coarse or fine. Coarse threads are better when working with brittle materials; they are sturdier and are easier to thread and unthread compared to fine. Coarse threading also allows for thicker coatings and platings.

• Hex Nuts are appropriate for use in low-strength assemblies
• Vespel is suitable where high temperature, high strength, and low levels of outgassing are desirable
• Drive system is a hexagon-shaped head
• Coarse threads are better for brittle materials, and will assemble and disassemble more quickly than fine threads
• Ensure a lasting hold for any project