iexcell 50 Pcs M4 x 20/25/30/35/40 Stainless Steel 304 Hex Socket Flat Head Cap Screws Bolts Assortment Kit

🧐 The Specification and Need As someone who frequently prototypes and works on electronics enclosures and 3D-printed assemblies, reliable metric fasteners are essential. The M4 x 12mm size is a workhorse in my shop, and I specifically required the flat (countersunk) head with a hex socket drive for a flush, clean, and secure finish. Buying this 100-piece bulk pack from iexcell was an excellent way to replenish my stock without sacrificing quality. 💎 Material and Finish (The 304 Advantage) The primary feature here is the 304 Stainless Steel construction. This is exactly what is needed for projects that might encounter moisture, outdoor use, or need superior corrosion resistance over basic zinc-plated steel. Corrosion Resistance: The 304 composition (also known as 18-8 stainless) provides peace of mind that these connections will not rust or discolor, maintaining both the structural integrity and the aesthetic of the final assembly. Appearance: The bright, clean finish of the stainless steel looks professional and is uniform across the entire batch of 100 screws. 📏 Precision and Performance A screw is only as good as its threading. The M4 x 0.7mm pitch specification demands consistency, and these fasteners deliver. Thread Consistency: Every screw I tested threaded smoothly into pre-tapped holes and captive nuts, confirming the pitch and diameter were precisely cut. There was no binding or cross-threading issues, which is a major time-saver in assembly work. Hex Socket Drive: The internal hex socket is well-formed, allowing for the application of sufficient torque (necessary for a flat head to countersink properly) without the hex key slipping or stripping the socket. The drive depth seems appropriate for the size. Flat Head Consistency: The countersunk head angle was uniform, ensuring the screws sat perfectly flush when recessed into a prepared countersink hole, resulting in a beautifully clean, snag-free surface. ✅ Final Recommendation For any hobbyist, maker, or professional requiring high-quality, corrosion-resistant, and aesthetically clean metric fasteners, these iexcell M4 x 12mm Stainless Steel 304 Flat Head Cap Screws are highly recommended. They meet all mechanical specifications with consistent quality, making them a reliable and valuable addition to the parts bin. I would absolutely buy this quantity again to keep my stock full.

Good screws I use for bird houses. its only one size not a variety pack, durability i'm not sure about as I just started using them, but they work well for my 3d prints

Package comes with 5 different lengths of M3 machine screws. Great for small DIY projects. Use them mainly with my 3d printing projects. For the price the amount of screws you get is worth it. Beats going to the hardware store.

Quality is better than most things that come from China, I'm from the old school, so I still believe that lessons learned are best remembered if a price is paid, so when I get a product that is sub-standard, or doesn't match the description, I send it back, even if it's a low-dollar item,,,,, I still send it back, approximately one third of the Amazon items that I receive fall into that category and get sent back, the vast majority of those items are made in China. This assortment of screws is decent quality and will not be sent back. I took off one star because the shipping was a little slower than advertised.

Great product

I need stainless screws for outdoor projects here and there. This is a nice kit to have around. Ordinary deck screws will not last without rusting away.

I had to find this odd size. This was the size and thread count I needed. I get worried when I buy screws online some of them feel cheap and strip very easily. These were high quality. None of those traits.

These are great quality for the price but the quantity is huge. If they sold these in half the quantity id still be willing to pay 80% as much! These were perfect to get the new gen2 hopper installed on my fellow ode gen 1.

Buen producto, cumple con todos los tamaños.

I needed M4 screws I was not sure whether I need 35 or 40. This box came with the selection and it was easy to find out. Really convenient packaging.

They arrived late (Aus Post) but worth the wait. Perfect fit and very tidy finish. Nice one.

⭐️⭐️⭐️⭐️⭐️ These iexcell M6 x 20mm stainless steel flat head cap screws were exactly what I needed. The thread pitch (1.0 mm) was accurate, and every screw in the pack fit perfectly with no cross-threading or rough starts. The 304 stainless steel feels sturdy and well-machined. Threads are clean and consistent, and the hex sockets are properly cut — no stripping or shallow heads. I used them for a small equipment assembly project, and they tightened down smoothly and seated flush just like they should. The flat head design sits nicely in countersunk holes, giving a clean, professional finish. No burrs, no defects, and all 50 pieces were usable. Overall, great value for the quantity and quality. I wouldn’t hesitate to buy these again for future projects.

Super Schrauben, ewig nach gesucht und Versand klappte auch super schnell.