195 GB/T 929-1988 單耳托板自鎖螺母 Self-locking nuts,singlelug, anchor
196 GB/T 930-1988 雙耳托板自鎖螺母 Self-locking nuts,twolug, anchor
197 GB/T 931-1988 角形托板自鎖螺母 Self-locking nuts,angle, anchor
198 GB/T 932-1988 氣密單耳托板自鎖螺母 Self-locking nuts,singlelug, anchor, sealing,
199 GB/T 933-1988 氣密雙耳托板自鎖螺母 Self-locking nuts,twolug, anchor, sealing
200 GB/T 937-1988 成組游動托板自鎖螺母 Self-locking nuts, anchor, floating,Gang channel