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Hardness runs HRC 40-53 depending on the grade and, and 45H is the standdard we work from for most orders—it gives a good balance for both stainless A2/A4 and alloy steel. These are cup point set screws, DIN 916, so that hex socket drive and the sharp edge on the point is what digs in to resist loosening under vibration in machinery mounts or electronic chassis.
The cup point works better than a flat or cone point if you’re trying to secure something against axial movement without marring a shaft surfce too badly, but it will still leave a mark. We see these most often in automotive sub-assemblies where a flush fit is needed and there’s no room for a head, but they’re also common in electronics for trim pots or adjustment mechanisms where you’re torquing into a soft metal.
Sizes run from M3 up to M20, though the M12 and M16 sizes are what move fastest—everyone wants those for jig and fixture work. M3 is tiny, and you’ll need a small hex key, probably 1.5mm or 2mm, so don’t lose it; we usually have stock, but confirm lead time on the M20 or off-spec lengths like 40mm or 50mm.
Surface treatment is zinc plated, and you can choose black, white, or yellow—most buyers go with yellow for corrosion resistance in outdoor gear or white for cleaner appearance in electronics enclosures. The coating isn’t thick, maybe 5-8 microns, so it won’t mess with thread fit on the M3 sizes (check your tolerance, though). Alloy steel gets the HRC 45+, stainless A2 is usually softer at HRC 40-45, fine for most applications but not if you’re torquing into hardened steel.
The HS code is 731815, which covers set screws, and that matters for customs if you’re shippng internationally—we export a lot to machinery rebuild shops and automotive tier-2 supliers, typically in bulk packs of 1000 or more with the MOQ around 500 pieces per size. Packaging is usually poly bags in boxes, but our company can do small blister packs for retail if you’re a distributor.
And we’ve handled batches where the cup point was too blunt—basically, the forming die wore out—so check your COA on hardness and point profile if you need them for a critical jig. We test every run with an optical comparator, but we don’t always retorque to spec unless you ask.
MOQ for M3 is 10,000 pieces. For other sizes, it varies, but we can discuss smaller lots for sample orders.
Yes, we can supply mill test certificates for A2 and A4 stainless steel upon request. Just let us know when placing the order.
We can adjust the cup point geometry within reason, but standard DIN 916 dimensions apply unless you specify otherwise. Minimum custom order is 20,000 pieces.
For M6 alloy steel with zinc plating, lead time is around 20-25 days after order confirmation and deposit.
Zinc plating offers moderate corrosion resistance, but for outdoor use we'd recommend A4 stainless steel for better durability against moisture.
Came across these set screws while sourcing components for a machinery assembly project. The ordering process was straightforward, and the shipping was surprisingly fast. The items arrived well-packaged, with no signs of damage or missing pieces, which is always a relief when dealing with small hardware. In terms of quality, the screws appear to be well-manufactured; the stainless steel finish is consistent, and the hex sockets are cleanly cut, allowing for a good fit with an Allen key. The threads are precise, which is crucial for the set screw application to avoid stripping. Customer service was responsive when I had a pre-sale inquiry about material specifications, providing clear and helpful information promptly. Overall, a satisfactory experience from start to finish.
Fantastic experience overall. The shipping was incredibly fast and efficient. I placed the order and received the screws much sooner than anticipated, which was a huge help as we were on a tight project deadline. The packaging was secure and professional, ensuring all items arrived in perfect condition without any loose pieces or damage. Regarding the quality, the screws appear to be very well-made. The stainless steel finish is clean and consistent, and the hex socket drive looks precisely machined. They seem to meet the DIN 916 specification as described. The service from the seller was also excellent. Communication was clear and prompt, and any pre-order inquiries were answered thoroughly and courteously. The entire transaction was smooth and hassle-free. I am very satisfied with this purchase and would not hesitate to order from this supplier again for future needs. The combination of reliable logistics, apparent high quality, and great customer service makes this a highly recommended source for industrial fasteners.
Fantastic experience from start to finish. The shipping was incredibly fast and efficient; the package arrived well ahead of the estimated delivery window, which was a pleasant surprise. Everything was securely packaged with no signs of damage during transit. Regarding the quality, the screws appear to be manufactured to a very high standard. The finish is smooth and consistent, and the dimensions seem precise, exactly as specified for DIN 916 standards. The stainless steel material feels robust and suitable for demanding applications. Customer service was also commendable; the communication was clear and prompt, and any preliminary inquiries were handled professionally and courteously. Overall, a very reliable and satisfactory transaction that inspires confidence for future purchases. The combination of rapid logistics, apparent top-tier material quality, and responsive support makes this supplier highly recommended for anyone in need of precision components.
Naturally, the shipping was incredibly prompt and efficient. The package arrived well ahead of the estimated delivery window, which was a pleasant surprise. Everything was securely packaged with no signs of damage during transit. The logistics process seemed flawless from order confirmation to delivery. Regarding the product quality, the screws appear to be manufactured to a high standard. The stainless steel finish is consistent and clean, and the hex socket drive looks precisely machined. They feel substantial and exactly as described for wholesale hardware. The service provided was also commendable. Any preliminary questions were answered quickly and professionally. The ordering process on the platform was straightforward. Overall, this was a very satisfactory procurement experience focused on the core aspects of receiving goods. The reliability in these fundamental areas gives confidence for future business needs. The supplier seems dependable, which is crucial for bulk industrial components. No issues were encountered from start to finish, which is all one can ask for in such transactions. The attention to basic execution is noted and appreciated.
Came across these set screws during a major machinery overhaul project and needed a reliable bulk option. The shipping was surprisingly fast for a wholesale order; everything arrived well-packaged and ahead of schedule, which was a relief given our tight timeline. As for the items themselves, the quality seems solid. The stainless steel has a good finish, and the hex sockets are cleanly machined—no burrs or misalignments that we could find in our initial inspection. The service aspect was straightforward; the ordering process was clear, and there were no hiccups with the bulk purchase. While we haven't installed them in the final assemblies yet, the initial fit and appearance match the specifications we required for precision electronic housings. Overall, a smooth transaction from start to finish, which is exactly what you hope for when sourcing components like these.
Outstanding experience from start to finish. Ordering was straightforward, and the shipping was remarkably fast. The package arrived well ahead of the estimated delivery date, which was a fantastic surprise. Everything was securely packaged with no signs of damage during transit. Regarding the product quality, the screws appear to be precisely manufactured. The finish is smooth and consistent, and the dimensions seem perfectly accurate to the specified DIN 916 standard. The stainless steel has a good, clean look, exactly as expected for A2/A4 grade. I have high confidence in their mechanical performance for our applications. Customer service was also top-notch. I had a minor question about the order, and the response was prompt, polite, and thoroughly helpful. Overall, this was an exceptionally smooth transaction. The combination of rapid logistics, apparent high quality, and excellent support makes this supplier highly reliable. I would not hesitate to place another wholesale order for these set screws or other components in the future. This level of service and product integrity is exactly what our business needs for consistent operations.
A very smooth and efficient transaction overall. The shipping was surprisingly fast, arriving well ahead of the estimated delivery window, which was a pleasant surprise. The packaging was secure and appropriate, with no damage to the contents whatsoever. Regarding the product quality, the screws appear to be well-manufactured; the stainless steel finish is clean and consistent, and the hex socket drive is precisely machined. They seem to match the DIN 916 specification as described. Customer service was responsive and professional when I had a pre-sale inquiry about bulk quantities. The communication was clear and helpful. For a wholesale order focused on basic hardware components, the entire process from ordering to delivery was handled competently. The product looks suitable for its intended industrial applications. A satisfactory purchase experience.
Wanted to highlight the excellent shipping speed on this order. The set screws arrived much faster than the estimated delivery window, which was a very pleasant surprise and helped keep our small project on schedule. The packaging was secure and professional, with no signs of damage or mishandling during transit. Regarding the product quality, the stainless steel material feels solid and the machining on the cup points and hex sockets appears precise and consistent across the batch we received. The finish is clean and matches the specifications. Customer service was responsive and clear in their communication during the ordering process, providing timely updates. Overall, a very satisfactory procurement experience from logistics through to the physical product received.
