Safety locking plates type SI and SIV (with anti-rotation element) for the surface mounting of pipe / tube clamps and hose clamps of the Twin Series according to DIN 3015, Part 3, in conjunction with stacking bolts type AF. Manufactured from steel with STAUFF zinc/nickel surface coating for reliable corrosion protection. Alternatively also available in stainless steel V2A 1.4301 / 1.4305 (AISI 304 / 303) and V4A 1.4401 / 1.4571 (AISI 316 / 316 Ti).