BLUE NUT GRADE THREAD LOCKER PROVIDES MEDIUM STRENGTH. IT SEALS MOST NUTS AND BOLTS WITH USE OF STANDARD TOOLS TO UNTIGHTEN. LOC-TITE EQUIVALENT #242 MEDIUM RED -- LIQUID THREAD LOCKER. HIGH STRENGTH, PERMANENT. FOR USE ON FASTENERS UP TO 1" IN DIAMETER. PERMANENT, WHERE NO DISASSEMBLY IS REQUIRED. LOC-TITE EQUIVALENT #271 HIGH