Carbon Steel Tapered Square Washer For M16 Screws, 2.5mm to 7mm Thick, ID 18mm x 31mm Wide, Pack of 10, ZFM1608
SGD $22.00
Use tapered square washers to compensate for channel sections within C-beams or I-beams where parallelism is lacking. This allows them to be secured and fastened against the base material.