ESRON STUD & BOLT LOCK 6271 is a green colored medium to high strength and medium viscosity for general purpose permanent threaded fasteners. Excellent chemical resistant and fuels resistant. Used to prevent vibration, loosening of bolts, screws and studs up to 1" in diameter. Heat may be required to disassembly the part. Ideal application for valve sets, fasteners on vibrating machines, automotive suspension bolts, refrigeration plant, transmission and engine block studs.