Simpson Strong-Tie U-washer

US Washers (U-washers)

are made from steel sheets and available in 4 different sizes.

40 × 40 × 10 and 40 × 50 × 10:
At some of the Simpson Strong-Tie wood-joints , these washers are arranged between wood-connector and bolt-head, to reach a reinforcement of the wood-connectors and achive higher load-earing capacity. 

The washers 60 × 60 × 6 with Ø14 mm hole for structural bolted-joints M12 are used to avoid the pushing of the nut or bolt-head into the wood.