304 Stainless Steel BSP HEX LOCKNUT 1/2 Inch BSP Threaded Jam Nut with Groove for O-Ring BSP Lock Nut fits Fusti/Anvil and Other Fermenter/Boiler Spigots - Hobby Homebrew
Nylon Locking Nut High Stainless 19mm Wrench DIN 982 - BelMetric
hard-lock ring lock nut, bearing lock nut, lock nut form Taiwan Fortune Bright Industrial Co., Ltd.
FS306 SAE O-Ring Face Seal ORFS Bulkhead Locknut | HydraulicsDirect.com
Amazon.com: Dorman 784-779D Hex Lock Nuts With Nylon Ring - Class 8.8 - M12-1.25, 2 Pack Universal Fit : Automotive
Dorman 433-014BX Hex Lock Nuts With Nylon Ring-Class 8- Thread Size; M14-1.50, Height 14mm , Pack of 8 - Walmart.com