Socket Shoulder Bolts ISO 7379
ISO 7379 Shoulder Bolts, also known as Precision Shoulder Screws, are engineered to provide accurate alignment and reliable fastening in mechanical assemblies. Featuring a cylindrical shoulder and a threaded end, these bolts are widely used in tooling, machinery, automation, mould making, and precision engineering. Their unique design allows for smooth rotation, sliding, or spacing functions, making them an essential component in high-performance applications.
Available in a wide range of diameters, lengths, and materials such as alloy steel, stainless steel, and zinc-plated finishes, ISO 7379 bolts meet strict international standards for strength, durability, and dimensional accuracy. Whether you need them for guides, pivots, or clamping systems, they ensure consistent performance and reliability.
By choosing ISO 7379 Shoulder Bolts, you benefit from:
- High precision and tolerances for exact fits.
- Durable materials that withstand wear and corrosion.
- Versatile applications across tooling, jigs, fixtures, and machinery.
- Compliance with ISO standards for guaranteed quality.
What Are ISO 7379 Shoulder Bolts Used For?
ISO 7379 shoulder bolts are designed for applications where precision alignment and controlled movement are essential. The unthreaded cylindrical shoulder allows components to rotate or slide freely, while the threaded section secures the bolt in place. Typical uses include:
- Tool and die making – acting as stripper bolts or locating pins.
- Automation systems – for mounting moving components and guide rails.
- Injection moulding – to align and secure mould plates.
- Precision machinery – as pivots, axles, or guides.
This versatility makes them a preferred choice in industries that require reliability, accuracy, and repeatability.
Why Choose ISO 7379 Over Standard Bolts?
Standard bolts are designed purely for fastening, but ISO 7379 bolts serve both fastening and guiding functions. Their precision-ground shoulder ensures an exact diameter and smooth surface, enabling moving parts to function without play or misalignment. Compared to regular fasteners, they offer:
- Tighter tolerances for precision fits.
- Greater load-bearing ability on the shoulder rather than the thread.
- Reduced wear in applications with frequent movement.
- Improved accuracy in assemblies where alignment is critical.
For engineers, this means less downtime, smoother machine operation, and higher component lifespan.
What Materials Are ISO 7379 Shoulder Bolts Available In?
These bolts are manufactured in several materials to suit different environments:
- 12.9 Steel (Hardened) – ideal for heavy-duty and high-load applications, offering excellent strength and wear resistance.
- Stainless Steel (A2 / A4 grades) – best for corrosive or outdoor environments where resistance to rust is essential.
By selecting the correct material and finish, you can extend the lifespan of your assembly and reduce maintenance requirements.
How Do I Select the Right ISO 7379 Shoulder Bolt?
Choosing the correct bolt depends on several key factors:
- Shoulder Diameter – must match the clearance hole or component bore size.
- Shoulder Length – determines the spacing or thickness of the parts being joined.
- Thread Size & Length – ensures compatibility with the tapped hole or nut.
- Material & Finish – selected based on strength, wear, and environmental conditions.
- Tolerance Requirements – especially important in high-precision or high-speed assemblies.
Using the wrong dimensions can lead to misalignment, excessive wear, or mechanical failure. Always cross-check with ISO 7379 specifications or consult your supplier for guidance.
Where Can I Buy ISO 7379 Shoulder Bolts Online?
ISO 7379 shoulder bolts are widely available from specialist fastener suppliers, engineering distributors, and online industrial marketplaces. When purchasing, it's important to:
- Ensure the supplier provides ISO-certified parts for guaranteed compliance.
- Check the dimensional charts and technical datasheets to confirm the correct fit.
- Choose a supplier with stock availability for quick delivery.
- Consider bulk purchasing options for cost efficiency in large projects.
Vital Parts can also provide both metric and inch customs, technical support, and CAD drawings to assist engineers in the design process.
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