Phosphor Bronze Fasteners

Phosphor Bronze Fasteners are versatile components suitable for an extensive range of applications and assemblies – often desired for their high tensile strength, durability, and excellent corrosion resistance. Phosphor Bronze, sometimes referred to as Tin Bronze, is a Copper-based alloy composed of 0.5-11% Tin and 0.01-0.35% Phosphorus. Certain alloys may contain traces other elements such as Zinc, Iron, and Lead to provide or enhance specific properties.

The high quantity of Tin improves the strength and corrosion resistance of Copper, while the addition of Phosphorus increases material stiffness, fatigue resistance and wear resistance – ideal for marine and other corrosive environments. These fasteners are also non-magnetic, host a low coefficient of friction, and offer fair electrical conductivity – frequently used for electrical equipment and within the automotive sector.

Components made of Phosphor Bronze often have a high melting point of around 950°C, which can vary depending on the chemical composition. Phosphor Bronze grades are usually designated by their UNS number. Some of the most common grades used for fasteners are C510, C519, C521, and C544. Alloys that conform to British Standard are also utilised for the manufacturing of screws, bolts, nuts and washers e.g. PB1 and PB2.

Available now at Fastenright

Our full range of Phosphor Bronze Fasteners – available from stock or to order – can be found by clicking the links below. Here you will find detailed product information, size charts, drawings and technical specifications. These components can be supplied in a variety of sizes and grades as standard.

Many of our existing products can be manufactured from Phosphor Bronze upon request. Non-standard sizes, grades and finishes are available to order as specials. Fastenright can also provide bespoke components manufactured to specification and drawings. Minimum order quantities apply.

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