RS PRO M8 x 0.75 mm Index Bolt, Zinc Plated Steel, Polished Finish, Round Head, 30mm Long, 21mm Diameter 144-3680

RS PRO delivers the 144-3680 index bolt, ideal for industrial mechanical assemblies requiring robust locating, positioning, and locking capability. This index bolt is crafted from zinc plated steel for superior corrosion resistance and is finished with a polished surface. The product features a precise M8 x 0.75 mm thread, allowing secure engagement with compatible components.

The 30 mm length ensures optimal reach and insertion depth, supporting reliable operation in a range of engineering hardware and industrial setups. The round head, measuring 21 mm in diameter, provides an easy-to-handle profile and is paired with a spring loaded thermoplastic black knob for comfortable, ergonomic manipulation. Inside the plunger body, a stainless steel pin ensures further durability and reliable function under frequent use.

This index bolt is intended for applications such as jigs, fixtures, workholding, machine maintenance, and various equipment locking mechanisms. Its precise thread sizing and high-quality materials make it suitable for demanding environments, including manufacturing, maintenance, and assembly lines where repeatable and secure positioning is critical.

The RS PRO 144-3680 index bolt does not include a 90 degree rest position, ensuring direct engagement and rapid operation without intermediate stops. The component is part of a wider industry-standard family of indexing plungers, ball locking pins, and cam action plungers, catering to extensive requirements in mechanical, fluid power, and engineering hardware categories.

Its construction achieves a balance of strength and ergonomic usability, with the combination of a polished zinc plated steel body and a spring loaded handle designed for repetitive tasks. The product’s quality is supported by RS PRO’s established reputation in industrial hardware.

Typical use cases include industrial machinery, mechanical equipment, laboratory hardware, automation fixtures, and construction setups where robust indexing and locking are vital for operational safety and reliability.

High-strength index bolt designed for secure positioning and locking tasks. Constructed from durable zinc plated steel for enhanced corrosion resistance. Features a polished finish and a round head with a 21 mm diameter.

M8 x 0.75 mm thread provides precise fitting for compatible mechanical assemblies. 30 mm length allows reliable engagement within engineering hardware setups. Spring loaded thermoplastic black knob combined with steel plunger body for ergonomic operation.

Stainless steel pin for additional durability and long working life. Suitable for industrial, machinery, and equipment maintenance applications.

Explore more industrial positioning hardware and index bolts in the Spring Plungers & Indexing Plungers category, or browse additional RS PRO solutions for engineering hardware on EnvMart.

Explore more products in our Index Plunger category.