Following ASTM B994 specifications, our carbon steel bolts are coated in a durable Nickel-Cobalt alloy specifically designed to resist seizing and stand up to corrosion. The coating also helps prevent galling and provides a consistent k Factor so you can more easily apply the proper torque for the job. Each bolt can be traced to its production batch, which is continually tested in the harshest lab conditions to help customers anticipate its life cycle. Doxsteel bolts comply with API 20E and have proven advantages over other bolts in the market, including a 5 year No Seize warranty and its ability to withstand high temperatures with ZERO Hot Bolting required. Address: The Woodlands, TX. Tel: +1-281-291-1500.