4-40 x 1/4" Pan Head Phillips SEMS Screws with Flat Washer SUS304 Stainless Steel Inox

EFPP0404S is a 4-40 Pan Head head Phillips drive screw made of SUS304 Stainless Steel, manufactured by Superneer Limited. It has a length of 1/4 inches and is commonly used in electronics, watches, precision instruments, and 3D printers.

The EFPP0404S screw features thread size 4-40, length of 1/4 inches, head type Pan Head (head diameter 0.219-0.205 inches), drive type Phillips (drive size PH No.1), and is made of SUS304 Stainless Steel.

The EFPP0404S screw is made of SUS304 Stainless Steel. Superneer provides material test reports (MTR) and RoHS compliance certificates for all products. SUS304 Stainless Steel offers excellent corrosion resistance and mechanical strength.

The EFPP0404S screw has a 4-40 thread. This is a UNC (Unified National Coarse) thread with 4-40 specification, widely used in North American applications.

EFPP0404S Pan 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 Pan Head head aesthetics is required.

The minimum order quantity (MOQ) for EFPP0404S is 10,000 pieces. The unit price is $0.046 USD for MOQ quantity. Larger quantities receive discounted pricing. Contact [email protected] for custom quotes.

The lead time for EFPP0404S 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 EFPP0404S uses a Pan Head head type. Pan 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 EFPP0404S (4-40, 1/4 inches), ensure your application requires this specific size.

EFPP0404S uses SUS304 Stainless Steel finish, while alternative variants in the same thread/length specification include EFPP0404Z (Blue Zinc Plated Steel), EFPP0404B (Black Zinc Plated Steel). The SUS304 Stainless Steel of EFPP0404S is specifically selected because it offers superior corrosion resistance for outdoor, marine, and humid environments, excellent hygiene properties for food and medical equipment, and good mechanical strength at low cost relative to exotic alloys. This distinction makes EFPP0404S the preferred choice when these properties align with your application requirements.