--- title: "Outdoor Applications Double Thread Self Drilling Screws From China" description: "Outdoor Applications Double Thread Self Drilling Screws From China — Self-Drilling & Tek Screws. Grade: Bi Metal. MOQ 200 pieces, US$0.11 – 0.16." url: https://engineeringhardware.com/product/outdoor-applications-double-thread-self-drilling-screws-from-china/ source: Engineering Hardware & Fasteners --- # Outdoor Applications Double Thread Self Drilling Screws From China [![Outdoor Applications Double Thread Self Drilling Screws From China](https://img.engineeringhardware.com/Outdoor-Applications-Double-Thread-Self-Drilling-Screws-From-China.webp)](https://img.engineeringhardware.com/Outdoor-Applications-Double-Thread-Self-Drilling-Screws-From-China.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Screws › Self-Drilling & Tek Screws](https://engineeringhardware.com/fastener-products/screws/self-drilling-tek-screws/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/outdoor-applications-double-thread-self-drilling-screws-from-china.md) Model no. **UNF-01** US$0.11 – 0.16 / piece MOQ 200 pieces · Final price confirmed in your quote - **Material:** Stainless Steel + Carbon Steel - **Head Style:** Hexagonal - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Grade:** Bi Metal - **Surface Treatment:** Zinc Plated, Ruspert, Dacromet, Customized - **Package Size:** 47.00cm * 15.00cm * 15.00cm Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Outdoor%20Applications%20Double%20Thread%20Self%20Drilling%20Screws%20From%20China%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Foutdoor-applications-double-thread-self-drilling-screws-from-china%2F) Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order. ## Specifications | Customization | Available | | --- | --- | | Material | Stainless Steel + Carbon Steel | | Type | Hexagon Head | | Model NO. | UNF-01 | | Groove | Hexagon | | Connection | Drilling | | Head Style | Hexagonal | | Standard | DIN, GB, ANSI, BSW, JIS, GOST | | Grade | Bi Metal | | Drill Point | Drilling Screws | | Surface Treatment | Zinc Plated, Ruspert, Dacromet, Customized | | Delivery | Sea Freight, Air, Train, Express | | Certification | Eta, ISO9001, BSCI | | Application | Solar Mounting and Outdoor | | Transport Package | Carton Boxes + Pallets | | Specification | 4.8/5.5/6.3 | | Origin | China | | HS Code | 7318151001 | | Production Capacity | 700tons/Month | | Package Size | 47.00cm * 15.00cm * 15.00cm | | Package Gross Weight | 2.500kg | | Category | [Self-Drilling & Tek Screws](https://engineeringhardware.com/fastener-products/screws/self-drilling-tek-screws/) | ## Technical parameters | Name | Bi-metal Self-drilling Screws | | --- | --- | | Size | 6.3/5.5 | | Drill Point | #1, #2, #3, #5 | | Material | SUS304+SCM435, SUS316+SCM435 | | Head | Hex Washer | | Thread | Double Thread | | Washer | SUS304+EPDM | | Washer Specification | E14, E15, E16, E19 and etc | | Surface Treatment | Chrome, Ruspert, Decromet, etc | | Application | Solar Mounting and Outdoor | | Certification | ETA, ISO, BSCI | | Origin | China | | Specification | | | | | --- | --- | --- | --- | | Diameter(mm) | Length(mm) | Thread Size | Drill Point | | 4.8 | 25-220 | 16 | #1, #2, #3, #5 | | 5.5 | 25-300 | 14 | #1, #2, #3, #5 | | 6.3 | 19-300 | 14 | #1, #2, #3, #5 | | 6.3/5.5 | 25-50 | 14 | #1, #2, #3, #5 | | 6.3/5.5 | 60-300 | Double Thread | | | Surface Treatment | | | | | | --- | --- | --- | --- | --- | | Types | Class2 | Class3 | Class4 | Dacromet | | Coating Material | Mechanical Galvanized | Mechanical Galvanized | Mechanical Galvanized | Zinc and Aluminum | | Salt Spray Test | 500Hours | 1000Hours | 2000Hours | 1000Hours | ## Description Outdoor Applications Double Thread Self Drilling Screws From China is part of our self-drilling & tek screws range (Screws). ### Key details - **Type:** Hexagon Head - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Material:** Stainless Steel + Carbon Steel - **Grade:** Bi Metal - **Head Style:** Hexagonal - **Groove:** Hexagon - **Surface Treatment:** Zinc Plated, Ruspert, Dacromet, Customized - **Connection:** Drilling Available configurations include material, head style, standard, grade and surface treatment. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 200 pieces at US$0.11 – 0.16 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you. ## Frequently asked questions ### What is the minimum order quantity (MOQ) for Outdoor Applications Double Thread Self Drilling Screws From China? The listed minimum order is 200 pieces, at US$0.11 – 0.16 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### What are the main specifications of Outdoor Applications Double Thread Self Drilling Screws From China? Type: Hexagon Head; Standard: DIN, GB, ANSI, BSW, JIS, GOST; Material: Stainless Steel + Carbon Steel; Grade: Bi Metal; Head Style: Hexagonal; Groove: Hexagon. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include material, head style, standard, grade and surface treatment. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing. ### What is the lead time and how is it shipped? Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment. ### Which other self-drilling & tek screws are available? The Self-Drilling & Tek Screws category lists 5,114 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/screws/self-drilling-tek-screws/](https://engineeringhardware.com/fastener-products/screws/self-drilling-tek-screws/) How we work ## Specified, checked and shipped by Engineering Hardware & Fasteners Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing. - DIN, ISO, ASTM, ANSI, JIS and GB standard parts - Non-standard parts made to your drawing - Dimensions, thread gauges and plating checked before packing - Export cartons and pallets, consolidated mixed orders - Samples available for approval before mass production [![Production floor](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor-1024x683.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor.webp) Production floor [![Inspection bench](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench.webp) Inspection bench [![Sorting & 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custom quote →](https://engineeringhardware.com/contact/) ## Request a quote for this product ## Related products [All Self-Drilling & Tek Screws →](https://engineeringhardware.com/fastener-products/screws/self-drilling-tek-screws/) [![High Quality Finest Price Self-Drilling Metal Corrugated Cross Roofing Screw](https://img.engineeringhardware.com/High-Quality-Finest-Price-Self-Drilling-Metal-Corrugated-Cross-Roofing-Screw.webp)](https://engineeringhardware.com/product/high-quality-finest-price-self-drilling-metal-corrugated-cross-roofing-screw/) Self-Drilling & Tek Screws ### [High Quality Finest Price Self-Drilling Metal Corrugated Cross Roofing Screw](https://engineeringhardware.com/product/high-quality-finest-price-self-drilling-metal-corrugated-cross-roofing-screw/) DIN, GB, ANSI, BSW, JIS, GOST · Carbon Steel **US$0.12**MOQ 100,000 pieces [![High Quality #8 Self Drilling Wall Anchors and Screws for 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