Locknut SKINDICHT® SM PG 21 LOCKNUT, locknut, PG 21, wrench size: 32mm, nickel-plated brass, Application areas: Withstands high chemical and mechanical stress,For thin-walled housings without threads that only allow one through hole,For locking a SKINTOP® /SKINDICHT® cable gland on the inside of the application (e.g. housing), Benefits: Item numbers ending in 'LF' are lead-free product alternatives with otherwise identical product properties. 'Lead-free' items do not contain lead, which is currently permitted to make up up to four percent in copper alloys, but could be banned in the future according to the RoHS directive,Available in sizes PG7 to PG48