美国universal 通止规、螺帽深度计、螺帽检查塞规
i型塞规:universal type 1 #0、universal type 1 #1、universal type 1 #2、universal type 1 #3、universal type 1 #4
i型深度计:#1 type 1 penetration、#2 type 1 penetration、#3 type 1 penetration、#4 type 1 penetration
ia型塞规:universal type 1a #0、universal type 1a #1、universal type 1a #2、universal type 1a #3、universal type 1a #4
i型深度计:#1 type 1a penetration、#2 type 1a penetration、#3 type 1a penetration、#4 type 1a penetration
#8926 total recess depth gage、#8917 total recess depth gage