関連ワード:  5/16 head screw size    5/16 head bolt size    5/16 cap screw head size    5/16 cap screw dimensions    5/16 lag screw head size    5/16 bolt head thread size    5/16-18 screw head size    5/16 flat head screw dimensions    5/16 bolt head dimensions    5/16 hex head screw dimensions