Extreme Temperature Standoffs Keystone Electronics Extreme Temperature Standoffs are a family of hex male-female and female-female standoffs, offered in 4-40, 6-32, and 8-32 thread sizes. These standoffs are constructed using a high-performance nylon plastic blend to give them exceptional tensile strength, maintaining pliability and properties in the most extreme conditions. Available standoff lengths include 1/4', 3/8', 1/2', 3/4', and 1'. These Keystone Electronics standoffs can operate between -29°C and +185°C (-20°F to +356°F) temperatures, making them ideal for automotive, under-hood applications.