RS PRO, Zinc Plated Steel Hex Nut, DIN 439B, M4

Half lock hex nuts from RS PRO are a cost effective and reliable fastener, ideal for securing a variety of screws and bolts. The hexagon shaped nuts are manufactured from steel and feature zinc plating, ensuring excellent durability with a reliable in a wide range of applications. The slim flat profile of the hex nuts makes them perfect for fastening to bolts with a short thread, especially in areas where space is limited or restricted. The 6 sided hexagonal shape allows them to be tightened or loosened with ease when using a hand tool such as a spanner, with access from 360 degrees making them a versatile choice of fastener. RS PRO steel half nuts are available in a variety of metric sizes, offering a range of high quality and reliable fasteners to suit your needs.

Half hex nuts, sometimes referred to as half lock nuts, are hexagonal shaped nuts that feature a thinner profile than standard hex nuts, making them ideal for fastening small joints or bolts with a short thread. Half hex nuts are manufactured from a variety of materials including steel, nylon and brass and are available in a wide range of metric sizes. Hex nuts are commonly used for assembly and construction where a reliable fastener is required. They are widely used in areas such as:

• DIY


• Automotive


• Workshops


• Plumbing


• Construction

DIN 439B CL4 & DIN936 CL17H

Half or full refers to the profile or thickness of the hex nut. Full nuts feature a deeper profile and are suitable for most standard fastening applications, whereas half hex nuts feature a slimmer profile and are suited to bolts with shorter threads. However, both types can be used to fasten various bolts and can also be used together.

Please note IMDS is not a regulatory requirement and is currently not supported by RS PRO