TECHNICAL SPECIFICATION: Fine Pitch, 18/8 Cold-rolled Grade AISI-304 Austenitic Stainless Steel Wire (Non-Magnetic), Resistant to temperature fluctuations between -320˚F to 800˚F, Tensile Strength +200,000 psi, HRc 43-50. The PRECOIL Spring type fine thread repair inserts are used in various low strength materials to improve the wear resistance of bolt connections and avoid the damage of thread. The locking type fine pitch spring wire screw sleeve of the PRECOIL Helicoil fine pitch thread insert can lock the screw into the threaded hole, so that the screw is not loose when subjected to shock vibration. Size for size, a fine thread is stronger than a coarse thread thread repair insert. This is both in tension (because of the larger stress area) and shear (because of their larger minor diameter). Because of the smaller pitch, called fine pitch, they allow finer adjustments in applications that need such a feature. Place your orders on www.samsindusneeds.com and get it delivered at your door-steps. HSN CODE: 73181110