4 x 3/16" Flat Socket Set Screws 12.9 Carbon Steel Black

HFS0403G is a 4-40 head Socket drive screw made of 12.9 Grade Steel, manufactured by Superneer Limited. It has a length of 3/16 inches and is commonly used in electronics, watches, precision instruments, and 3D printers.

The HFS0403G screw features thread size 4-40, length of 3/16 inches, head type (head diameter N/A inches), drive type Socket (drive size N/A), and is made of 12.9 Grade Steel.

The HFS0403G screw is made of 12.9 Grade Steel. Superneer provides material test reports (MTR) and RoHS compliance certificates for all products. 12.9 Grade Steel offers excellent corrosion resistance and mechanical strength.

The HFS0403G screw has a 4-40 thread. This is a UNC (Unified National Coarse) thread with 4-40 specification, widely used in North American applications.

HFS0403G head Socket drive screws are used in electronics assembly, PCB mounting, precision instruments, watches, 3D printers, optical devices, medical equipment, and consumer products where reliable fastening with head aesthetics is required.

The minimum order quantity (MOQ) for HFS0403G is 10,000 pieces. The unit price is $0.018 USD for MOQ quantity. Larger quantities receive discounted pricing. Contact [email protected] for custom quotes.

The lead time for HFS0403G is 15-25 days for production. Shipping to USA takes 5-15 days via sea freight, with shipping cost starting from $50 USD. Air freight is available for urgent orders. DDP and FOB terms are both available.

The 4-40 thread is approximately equivalent to M2.5 to M3 (approx). When substituting inch screws with metric screws, always verify the actual diameter and pitch compatibility.

The HFS0403G uses a head type. head provides a specific head design optimized for its intended application. This head type is selected based on the specific application requirements for load distribution, aesthetics, and accessibility.

To choose the right screw: 1) Determine the required thread size based on the tapped hole or nut; 2) Select the appropriate length based on the material thickness; 3) Choose the head type based on clearance and aesthetics; 4) Select the drive type based on torque requirements; 5) Choose the material based on environmental conditions. For HFS0403G (4-40, 3/16 inches), ensure your application requires this specific size.

HFS0403G uses 12.9 Grade Steel finish, while alternative variants in the same thread/length specification include HFS0403S (SUS304 Stainless Steel), HFS0403B (Black Steel). The 12.9 Grade Steel of HFS0403G is specifically selected because it offers high tensile strength for mechanical and structural applications where corrosion resistance is not the primary concern, often used in machinery, automotive chassis, and load-bearing assemblies. This distinction makes HFS0403G the preferred choice when these properties align with your application requirements.