M20 20mm Turnbuckle With Locknuts Stainless Steel 316 M20 (3/4") 20mm Turnbuckle Rigging Screw Jaw & Jaw Marine | UK Marine Grade Turnbuckle Eye And Eye Not to be used for overhead lifting. This is a metric turnbuckle with M20 threads, the imperial equivalent is 3/4. A locking nut is supplied on each end. Not to be used for overhead lifting. AISI... AISI 316 stainless is a premium grade of stainless and is considered by many to be best in class. Suncor 3/4 x 6 Eye & Eye Turnbuckle - 5200 lbs WLL, 316 Stainless Steel | Bishop Lifting Working Load Limit 9700lbs. 316 stainless is corrosion resistant and very durable even in the harshest of conditions. Marine Grade 316 Stainless Steel Open Body Turnbuckle US Type. Turnbuckles should regularly be rinsed with fresh water. End fittings should be checked This is for one (1) quality marine grade stainless steel (AISI 316) turnbuckle (or open body) eye and eye with locknuts. The imperial equivalent is generally considered to be 3/4. This is an M20 metric turnbuckle.