Psst Kenny,,, Axel nuts be my grandsons (Axel) knackers, Axle nuts are the threaded thingos that stop your axle and therefore your wheels coming adrift at somewhat inopportune moments, creating vast amounts of pain, suffering and later hmm shit stirring
Cheers Tim754
PS your local nut and bolt supply should have lovely fresh castellated ones in stock, for about $4.00 each, or $15.00 for stainless steel.