6-40 x 3/8 Button Socket Cap Screw Alloy - FMW Fasteners

6-40 x 3/8 Button Socket Cap Screw Alloy


Quantity Unit Price
1 to 999 $0.23
1,000+ $0.08
Regular price$0.23 USD

  • $100 orders ship FREE
  • In stock
  • Inventory on the way

6-40 x 3/8 Button Socket Cap Screw Alloy. If you need a secure fastener option, we carry the best Alloy Button Socket Head Cap Screws from Brighton Best. These screws are durable, as they carry a hardness of RC 38-43, which meets or exceeds ASTM F835. You can use button socket cap screws in strenuous environments that require they take a beating. They are manufactured from heat treated alloy steel — the 1960 series.

In particular, these button screws carry a larger head diameter than other socket variations, which increases their hold on materials like thin sheet metal. An internal hex drive style increases their security against tampering, and overall, they serve as a good substitute for other styles that remain prone to slippages — such as Phillips and slotted screw heads.

You’ll find that your satisfaction is our main concern at FMW Fasteners, which is why we allow you to customize your desired quantity down to the last piece of hardware. You will receive the exact number of units that you need to complete the job.

We reduce hassle with ordering and shipping, as optimized logistics result in a quicker, more efficient process.

We do offer free shipping on qualified orders. Place an order on 6-40 x 3/8 button socket cap screws today!

Most orders placed with us ship in 1-3 business days. More details here on how you can check on the status of your order.

All of our item images are accurate representative images of the product category, however, due to the limitless variations in thread patterns, finishes, and other variables that exist with fasteners, bits and cutting tools, they are representative images only.



They were swift and delivered fast! They had everything I needed.

Eddie Wilcox
Parma, OH


Exactly what we needed and apparently FMW is not only the single source, but the best source. Easy ordering-fast shipping and great communications.

John B.
Salem, OR

Exactly what I needed and received in a timely manner. Thank you!

Mary Marucci
Philadelphia, PA

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