The Grease Zerks offered by Cottco Specialty Hardware are unique and designed for use in all applications including Weld On Bullet Hinges, which by their design, require a longer threaded body in order to engage the threads of the upper hinge body.

Cottco Specialty Hardware offers to thread sizes: WX-33 is 5/16-18 while WX-79 is 1/4-20. Please visit our product pages for more concise information including diagrams, images and downloads.

Please contact us with further questions or requirements.