ASME/ANSI B18.21.1-10-1972
A型内外齿大锁紧垫圈 表10
Type A external-internal tooth large lock washers-Table 10
ASME/ANSI B18.21.2M-7-1994
米制A型锥形锁紧垫圈 表7
Metric type A toothed lock washers with countersunk-Table 7
ASME/ANSI B18.21.2M-8-1994
米制A型内外齿锁紧垫圈 表8
Metric type A external-internal tooth lock washers-Table 8