Description

When you’re working on your three-point hitch or loader connections and need a secure fastener that won’t back out on its own, a good castle nut makes all the difference. This 5/8″ UNF castle nut with its zinc and yellow finish gives you the reliable hold you need, plus those slots on top make it perfect for safety wire or cotter pins when you want to lock things down tight.

Key Features

Precision 5/8″ UNF threads fit snug without binding – no sloppy connections here
Castle slots on top let you use a cotter pin for positive retention in critical applications
Zinc and yellow coating fights rust and corrosion, even in wet field conditions
Heavy-duty steel construction handles the stress and vibration of farm work

Built for Real Farm Work

This castle nut is right at home on utility tractors like your Massey Ferguson 35 or 135, and Ford tractors from the 10 Series right up through the 4000s. These machines handle everything from mowing and cultivation to loader work and transport duties. When you need a fastener that stays put through all that bouncing and vibration, the castle design gives you that extra security.

Made to Last

The zinc and yellow protective coating isn’t just for looks – it keeps rust at bay when you’re working in damp conditions or storing equipment outside. The steel underneath is built to handle repeated tightening and loosening without stripping threads or losing its grip.

Installation Notes

Thread this nut on until it’s snug, then advance it just enough to align the castle slots with your cotter pin hole. Don’t overtighten – the cotter pin does the real work of keeping it from backing off. If the slots don’t line up, back the nut off slightly to the next slot rather than overtightening.