Newco Bolt

Newco Bolts: Specialty Fasteners Built for Precision

When a repair demands more than a generic hardware-store bolt, Newco delivers. Founded in 1985, Newco Products was built from the ground up with a single mission: to supply quality specialty fasteners and hard-to-find products that other suppliers simply don't stock. Decades later, that commitment remains the defining characteristic of every bolt the brand produces and sources.

The Newco bolt lineup is notably broad, spanning multiple standards and finish options to meet the specific demands of automotive, powersports, and general mechanical applications. Whether you're rebuilding a classic British automobile, servicing a Japanese import, or tackling a domestic platform, Newco stocks the right bolt for the job.

What Makes Newco Bolts Stand Out

Newco's bolt catalog is organized around the international standards that matter most to technicians and enthusiasts alike:

• Grade 8 Hex Bolts (YZ Finish) – Available in both coarse and fine thread, these high-strength hex bolts are treated with a yellow zinc (YZ) coating that provides corrosion resistance alongside their structural integrity — a combination important in underhood and underbody environments.
• DIN 931 Metric Bolts – Newco offers an extensive range of European DIN 931 partially-threaded hex bolts in multiple finishes, including A2 stainless steel, standard zinc, yellow zinc, and black oxide. Size options span from M4 through M12, making it straightforward to find an exact match for metric-spec machinery or vehicles.
• 933 Metric Aluminum Hex Bolts – A standout specialty item in the lineup, these lightweight, non-corrosive aluminum hex bolts are specifically noted as "hard to find" — ideal for weight-sensitive builds or applications where steel corrosion is a genuine concern.
• Flange Bolts – Newco flange bolts are built for automotive fitment, with vehicle-specific compatibility across a wide range of makes and models. The integrated flange distributes clamping load across a larger surface area, reducing the need for separate washers in many assembly situations.
• JIS / Japanese Standard Bolts – Newco carries J.I.S. fasteners that conform to the industry standard used in Japanese automobiles, motorcycles, and powersports equipment, providing the correct head geometry that standard metric tools can otherwise damage.

Finish and Coating Options

One area where Newco truly differentiates itself is in the breadth of finish options available within a single bolt standard. For DIN 931 metric bolts alone, shoppers can choose between plain zinc, yellow zinc, black oxide, and stainless steel variants — each suited to a different combination of corrosion environment, aesthetic preference, and torque specification. This level of selection is rare outside of dedicated specialty fastener suppliers.

Choosing the Right Newco Bolt

When selecting a bolt from the Newco lineup, the most important factors are thread standard (metric vs. SAE), thread pitch (coarse vs. fine), grade or strength class, and finish. For any vehicle-specific application, always verify the OEM thread specification before ordering. Newco's catalog is organized to help narrow choices quickly by diameter, pitch, and finish — making it easier to land on the right part without guesswork.

Browse the full Newco brand page to explore all available fastener categories, or shop the complete bolt category to compare options across manufacturers.