KB304 stainless steel cross recessed flat head self-tapping screws with flat head and broken tail, wholesale, M3/M4 self-tapping thread

The core advantages of 304 stainless steel countersunk cross cut-tail self-tapping screws are "rapid cutting and self-tapping, flat and concealed countersunk head, corrosion resistance and rust prevention, and compatibility with soft material assembly",

1. Tail-cutting design + self-tapping thread, soft material cutting is efficient and smooth. The screw tail is a V-shaped tail-cutting structure (with a sharp cutting edge), which, combined with the self-tapping thread, can quickly "cut" out an adaptive thread groove when drilling into soft substrates such as wood, eco-board, engineering plastic, and thin aluminum plates (≤1mm). No pre-drilling or tapping is required, and there is no risk of jamming due to substrate fibers/particles blocking the thread.
   Compared to ordinary pointed self-tapping screws, the cutting efficiency of cut-tail screws is improved by over 30%, and a single person can easily operate them with a manual screwdriver. They are suitable for scenarios such as furniture assembly and plastic shell fixation, especially for batch assembly of soft substrates, significantly saving labor hours.
2. The countersunk head structure is flat and concealed without protruding. The head is designed as a conical countersunk head, which can be fully embedded into the counterbore of the workpiece after tightening, flush with the surface of the base material, without protruding parts: avoiding scratching clothing, skin, or interfering with adjacent components, suitable for exposed assembly scenarios such as furniture panels and decorative boards; the fitting surface between the countersunk head and the counterbore can distribute the tightening pressure, preventing soft base materials from sagging or cracking due to excessive local stress, and protecting the integrity of the base material.
3. Made of 304 stainless steel, this material is corrosion-resistant and rust-proof in all scenarios, featuring an alloy ratio of 18% chromium and 8% nickel. A dense oxide film forms on the surface, which can withstand moisture, mild acid and alkali, and daily cleaning agents. It remains rust-free and corrosion-resistant even after long-term use in kitchen cabinets, bathroom furniture, balcony hangings, and other scenarios. There is no risk of plating peeling off, avoiding contamination of wood and plastic substrates (such as rust spots on furniture) caused by corroded carbon steel screws. The material is non-magnetic, environmentally friendly, and non-toxic, suitable for use in scenarios requiring safety, such as children's furniture and food-contact equipment accessories. Its service life is 4-6 times that of carbon steel galvanized models.

Shenzhen Huayuanxing Precision Hardware Co., Ltd. is a manufacturer specializing in the development, production, and sales of screw fasteners, with 20 years of industry experience. Huayuanxing screws are characterized by precision, miniaturization, and firmness. The company's existing factory covers an area of over 8,000 square meters, with a finished product warehouse of over 4,000 square meters and a stock inventory of over 3,000 tons. It has successively introduced more than 250 precision production equipment, including cold heading machines, thread rolling machines, and thread milling machines, capable of producing small screws with an outer diameter of 1mm and a length of 3mm, with an average daily production capacity of up to 20 million pieces. Huayuanxing has complete inspection equipment, including salt spray testing machines and 2D imaging detectors. It currently employs more than 50 people, including 8 engineering and technical personnel with 20 years of industry experience