What is a UNC bolt?

UNC: Is the symbol for Unified coarse pitch threads. UNF: Is the symbol for Unified fine pitch threads. UNEF: Is the symbol for United extra fine pitch threads. UNS: Is the symbol for Unified special threads.

What is UNC fastener?

UNC stands for ‘Unified Coarse’ and is the most commonly used thread type in the United States of America. UNC fixings are often used within the agricultural industry because of their strong coarse threads.

How do you know if a bolt is UNC or UNF?

The easiest to look at first is to determine if it is BSW , UNC or UNF. This is mainly because you can count the threads per inch quite easily by placing a rule or venire next to the bolt. If the bolt is not long enough, count the threads per half inch and then double your result.

Do all bolts have the same thread?

Bolts are also externally threaded, but they are held in place while torque is applied to a nut. Compatible internal threads must have the same geometry as the threads on the bolt. To the naked eye, it might appear that all fastener threads are created equal.

What does UNC stand for in a bolt?

A hexagon bolt, or hex bolt to give it its more common name, is a threaded bolt with a plain shank and hexagon shaped head. UNC stands for Unified National Coarse. It is a common imperial thread type with less threads per axial distance than its UNF equivalent.

Where can I find UNC hex head bolts?

As the most common threadform in the USA and Canada, Unified National Coarse (UNC) hex bolts are now mostly found in the UK in imported products, such as vehicles, but can also be found in many other places. UNC fasteners are sized in imperial units, similar to BSW fasteners,…

What are UNC bolts, nuts and washers made of?

UNC Bolts, Nuts and Washers. The UNC (Unified Coarse) threads are part of the Unified Thread Standard (UTS), most commonly employed throughout the United States and Canada. The threaded products on this page utilise this coarse pitch UNC standard.

What’s the difference between UNC and BSW fasteners?

UNC fasteners are sized in imperial units, similar to BSW fasteners, but the UNC thread profile has a 60° angle, while BSW fasteners have a 55° angle. We supply UNC hexagon head bolts in a wide range of sizes. We also offer UNC hexagon nuts, threaded bar, hex setscrews and socket cap screws.