Self Tapping Screws | 304/316 Stainless Steel Factory Direct Bulk Supply

For buyers that stock or assemble with self-tapping screws on a regular basis, consistent thread quality, stable size tolerance and reliable delivery matter more than overstated marketing words. As a China-based fastener factory with years of production experience, we focus on making practical, cost-effective self-tapping screws that fit real-world assembly needs. Most standard sizes are kept in our warehouse for fast dispatch, and we also take custom orders for non-standard specifications.

Self-tapping screws cut matching internal threads as they are driven into pre-drilled holes, which cuts out the separate tapping step and speeds up assembly work. They work on most common base materials without cracking the substrate, which is why they are used across almost every light industry and construction scenario. We adjust thread shape and tip design based on the target material — for example, trilobular thread for plastic parts, sharp point for wood, flat tail for thin sheet metal — to get better fastening performance.

▼  Available head & drive types

• ▶Pan head: Our best-selling style, with a rounded low-profile head and large bearing surface. Most often used for electronics housings, home appliances and general furniture assembly. We supply Phillips, Torx and slotted drive versions, including tamper-proof security designs.
• ▶Flat (countersunk) head: Sits flush with the material surface for a clean finish. A standard choice for cabinet doors, decorative panels and frames where a smooth surface is required.
• ▶Hex head: Six-sided head that works with regular wrenches, delivers higher tightening torque. Commonly ordered for roofing, sheet metal construction, outdoor brackets and wood projects.
• ▶We also carry button head, wafer head and truss head options for thin materials, plastic assemblies and visible surface applications.

▼  Materials & surface finishes

• ■Stainless Steel (304 / 316): The go-to choice for outdoor and humid environments. Our 304 grade passes 120 hours of neutral salt spray testing for general outdoor use; 316 grade holds up over 200 hours, suitable for coastal and marine projects.
• ■Carbon Steel: High tensile strength, budget-friendly for indoor use. Finishes include blue white zinc (48h salt spray), color zinc (72h), black oxide, black zinc, nickel plating and galvanizing.
• ■Brass: Non-magnetic with good conductivity, mostly used for electrical connections, lighting fixtures and decorative furniture.

▼  Size range

• ▶Metric: M1.2, M2, M2.2, M2.5, M3, M4, M5, M6, M8, lengths from 3mm to 120mm. M3, M4 and M6 are our fastest-moving sizes and always in stock.
• ▶Inch: #2, #4, #6, #8, #10, #12, 1/4″, 5/16″, 3/8″, lengths from 1/8″ to 4″.

▼  Who we supply

• ✓Plastic housing assembly for consumer electronics and small appliances
• ✓Wooden furniture, cabinetry and interior decoration
• ✓Sheet metal fabrication, metal studs and aluminum profile installation
• ✓Automotive interior trim and equipment enclosures
• ✓UPVC window and door frame fixing

▼  Custom & wholesale service

• △Stock items: MOQ starts from 100 pieces, orders placed before noon can usually be arranged for shipment the same day.
• △Custom orders: MOQ starts from 1000 pieces depending on design complexity. Sample production takes 3–5 days, and mass production runs 15–20 days for regular orders.
• △We support split shipments and scheduled delivery for long-term project orders.

YH Fastener is a China-based professional fastener manufacturer with years of production and export experience, focusing on self-tapping screws, machine screws, security screws and various standard & custom fasteners. Our products are delivered to hardware distributors, assembly factories and engineering clients across more than 40 countries.

We operate full in-house production lines with end-to-end quality control, from raw material verification to pre-shipment inspection, ensuring consistent size tolerance and fastening performance for every batch. We support both small trial orders and large bulk purchases, as well as OEM/ODM custom service based on your drawings or samples. Our core principle is to offer reliable, cost-effective fastening solutions with stable lead times and responsive after-sales support.

If you are looking for a stable self-tapping screw supplier, or need help picking the right specification for your material, send us your requirements. We will reply with pricing and lead time within one working day.