The RS PRO self-locking Nyloc nut set contains 545 nuts in seven different sizes from M3 to M10 (3 mm to 12 mm diameter hole). They're organised in a 9-compartment storage box, so you'll always be able to find the nut of the size you need. The nuts box is made of durable polypropylene, so it's sturdy enough for use in industrial or factory conditions.

Nyloc nuts have a nylon collar that increases friction on the screw thread to make them self-locking, so they won't come loose when they experience vibration from motors or contraction and expansion from heat or cold. They're made of A4 (316) stainless steel, so they can be used in harsh environments, such as marine settings. Highly abrasion-resistant, they can also withstand corrosive liquids or chemicals.

The nuts are suitable for use with ISO metric machine-threaded screws or bolts and accept standard metric spanners or sockets. Use them everywhere from home workshops to heavy industry.

• 545-piece nuts box
• Self-locking type nut
• Thread sizes of M3, M4, M5, M6, M8, M10, and M12
• A4 (316) corrosion-resistant stainless steel material
• Plain silver-coloured finish
• Supplied in a polypropylene compartment storage box
• Meets DIN (Deutsches Institut für Normung, or the German organization for standardization) 985 (self-locking nut standards) specification

RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards