CPC Subgroup
F16B 39/22 in which the locking takes place during screwing down or tightening (F16B39/01 takes precedence)
Full Title
Locking of screws, bolts or nuts (; locking of bottle closures B65D; locking of rail-fastening bolts for permanent ways E01B9/12; locking of fastening means for railway fishplates E01B11/38; locking devices for valves or cocks F16K) > in which the locking takes place during screwing down or tightening (F16B39/01 takes precedence)
3 direct subcodes
Child Classifications
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- F16B 39/24 by means of washers, spring washers, or resilient plates that lock against the object (locking to the screw-thread F16B39/14 , F16B39/36)
- F16B 39/28 by special members on, or shape of, the nut or bolt (F16B39/26 takes precedence; locknuts F16B39/12)