Simpson Strong-Tie Hex Head Washer 38mm Black SKU: 329113 MODEL: STN22-R8 Error. try again later You've successfully joined the club $ 36 .80 pack of 8 Mitre 10 MAvailable at Mitre 10 MEGA stores. Variants Designed to accompany Outdoor Accent structural screws for use with pergola brackets Features and benefits Designed to provide strong pergola bracket connections when used with matching structural screws. Look of a bolt, with the ease of a screw install. Black powder coated finish.