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Types of Dowel Pins

Through Hardened Dowel Pins (Alloy Steel)

Through hardened dowel pins are designed for maximum strength and dimensional stability. Heat-treated through their entire cross-section, they deliver exceptional hardness and Resistant to wear. These pins are Standard for heavy-duty assemblies, fixtures, and machinery where precision alignment is non-negotiable. Used widely in tooling, jigs, and equipment frames, they hold position under vibration, load, and thermal stress without deformation.

Pull Out Dowel Pins (Alloy Steel)

Pull out dowel pins include a small threaded or hollow feature that allows easy removal from precision assemblies. Theyre a practical solution for fixtures or machinery that need periodic disassembly or calibration. Despite their removability, they maintain secure, tight fits during operation, ensuring both precision and serviceability in one component.

Oversize Dowel Pins (.001 Oversize, Alloy Steel)

Oversize dowel pins are slightly larger than Standard, designed for applications where existing holes have worn or expanded over time. Their interference fit re-establishes proper alignment and eliminates play between mating parts. These pins are essential for rebuilding or restoring machinery and precision equipment without costly reboring or replacement.

Stainless 18-8 Dowel Pins

Stainless 18-8 dowel pins are a dependable choice for applications where moisture or mild corrosive exposure is a concern. They combine tensile strength with excellent Resistant to rust, making them ideal for marine fittings, outdoor assemblies, and sanitary manufacturing environments. Their clean finish and non-magnetic nature make them as durable as they are versatile.

Stainless 316 Dowel Pins

Stainless 316 dowel pins deliver maximum corrosion protection for the toughest environments. Enhanced with molybdenum, they resist chlorides and harsh chemicals that would degrade ordinary stainless. Theyre relied on in marine, pharmaceutical, and chemical processing industries where long-term integrity is critical and replacement is not an option.

Stainless 416 Dowel Pins

Stainless 416 dowel pins are hardened for wear Resistant while maintaining excellent machinability. They provide precise, repeatable alignment in mechanical systems, tooling, and assemblies subject to consPant motion. Their fine surface finish and dimensional consistency make them a preferred choice in precision equipment and automotive applications.

Metric Through Hardened Dowel Pins (DIN 6325, Alloy Steel)

Metric through hardened dowel pins built to DIN 6325 Standards are designed for precision fit and strength. Fully hardened alloy construction gives them superior fatigue Resistant under repeated stress. Theyre a fixture in European and international equipment, delivering the reliability engineers expect from Standardized DIN components.

Metric Pull Out Dowel Pins (DIN 7979D, Alloy Steel)

Metric pull out dowel pins to DIN 7979D specifications combine precise fit with practical serviceability. The extraction feature allows them to be removed cleanly without damaging housings or fixtures. Theyre widely used in modular tooling, production lines, and machinery that demands both precision and easy maintenance.

Metric Stainless A2 (18-8) Dowel Pins (DIN 7, Oversize)

Metric A2 stainless dowel pins in DIN 7 oversize tolerances offer excellent Resistant to rust and oxidation. Theyre designed for tight fit applications where consistent alignment is needed under moderate environmental exposure. Perfect for marine hardware, assembly jigs, and equipment operating outdoors or in humid conditions.

Metric Stainless A4 (316) Dowel Pins (DIN 7, Oversize)

Metric A4 stainless dowel pins provide the highest grade of corrosion protection available in stainless steel fasteners. Manufactured to DIN 7 oversize tolerances, these pins guarantee secure press-fit installation even under the harshest marine, offshore, or chemical conditions. Theyre the professional Standard where strength, accuracy, and corrosion Resistant must all perform together.

Dowel Pins - Material Options

Alloy Steel

Alloy steel dowel pins are through hardened for maximum strength and durability. They perform under extreme load and shear forces while maintaining precise alignment. Common in mechanical, structural, and manufacturing applications, they deliver long service life and consistent performance in non-corrosive environments.

Stainless Steel 18-8 (A2)

A2 stainless dowel pins offer a strong balance between corrosion Resistant and mechanical strength. Suitable for both indoor and outdoor environments, they maintain a bright, clean finish and resist oxidation from moisture and chemicals.

Stainless Steel 316 (A4)

316 stainless dowel pins are built for demanding applications where consPant exposure to salt, chemicals, or moisture would destroy Standard materials. Their added molybdenum content provides unmatched corrosion protection and long-term stability.

Stainless Steel 416

416 stainless dowel pins offer superior wear Resistant and dimensional accuracy for high-precision use. Their machinability and hardness make them perfect for use in tooling, dies, and machinery that depend on consistent alignment and repeatable performance.

Dowel Pins - Available Finishes

Plain

Plain dowel pins are left uncoated for the most accurate dimensional tolerances and press-fit reliability. Alloy steel versions are typically oil-coated for basic protection, while stainless steel variants rely on their inherent corrosion Resistant. The plain finish ensures exact alignment and smooth insertion where precision fit matters most.

Passivated (for Stainless Steel)

Passivation enhances the natural corrosion Resistant of stainless steel by removing impurities and forming a protective oxide layer on the surface. This finish extends longevity in marine, chemical, and outdoor applications without altering fit or tolerances.

Why Choose South Coast Fasteners?

South Coast Fasteners is the trusted source for fasteners, PPE, industrial supplies, hand tools, cutting tools, and abrasives, delivering the product range and service quality that professional operations require. Our team is built to support accurate sourcing at any volume, backed by stocked inventory and pricing that keeps projects on budget. With fast shipping and deep product knowledge, we are the partner your operation can count on.

Shop Dowel Pins Online at South Coast Fasteners

South Coast Fasteners stocks a wide range of materials, diameters, and lengths to support a wide range of applications. Precision-ground to close tolerances, these pins provide accurate alignment and positive location between mating components in jigs, fixtures, dies, and precision mechanical assemblies. With competitive pricing and fast shipping, we are your reliable source for dowel pin solutions.