M3 × 9mm Indented Hex Phillips Thread Forming Screws for Metal Steel Black

THM309B is a M3 Hex Head head Phillips drive screw made of Black Zinc Plated Steel, manufactured by Superneer Limited. It has a length of 9 mm and is commonly used in electronics, watches, precision instruments, and 3D printers.

The THM309B screw features thread size M3, length of 9 mm, head type Hex Head (head diameter 六角对边 WAF 4.82-5 mm), drive type Phillips (drive size PH No.1), and is made of Black Zinc Plated Steel.

The THM309B screw is made of Black Zinc Plated Steel. Superneer provides material test reports (MTR) and RoHS compliance certificates for all products. Black Zinc Plated Steel offers excellent corrosion resistance and mechanical strength.

The THM309B screw has a M3 thread. This is a metric thread with M3 specification, commonly used in international applications following ISO standards.

THM309B Hex Head head Phillips 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 Hex Head head aesthetics is required.

The minimum order quantity (MOQ) for THM309B is 10,000 pieces. The unit price is $0.027 USD for MOQ quantity. Larger quantities receive discounted pricing. Contact [email protected] for custom quotes.

The lead time for THM309B 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 M3 thread is approximately equivalent to #6 (approx 6-32). When substituting metric screws with inch screws, always verify the actual diameter and pitch compatibility.

The THM309B uses a Hex Head head type. Hex Head 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 THM309B (M3, 9 mm), ensure your application requires this specific size.

THM309B uses Black Zinc Plated Steel finish, while alternative variants in the same thread/length specification include THM309S (SUS304 Stainless Steel), THM309Z (Blue Zinc Plated Steel). The Black Zinc Plated Steel of THM309B is specifically selected because it offers a black decorative finish combined with good corrosion resistance, ideal for consumer electronics, automotive interiors, and applications where both appearance and rust prevention matter. This distinction makes THM309B the preferred choice when these properties align with your application requirements.