--- title: "2-1/2 Inch 20d Galvanized Iron Duplex Head Nails Sharp Diamond Point Double Headed Nail" description: "2-1/2 Inch 20d Galvanized Iron Duplex Head Nails Sharp Diamond Point Double Headed Nail — Common, Ring-Shank & Specialty Nails." url: https://engineeringhardware.com/product/2-1-2-inch-20d-galvanized-iron-duplex-head-nails-sharp-diamond-point-double-headed/ source: Engineering Hardware & Fasteners --- # 2-1/2 Inch 20d Galvanized Iron Duplex Head Nails Sharp Diamond Point Double Headed Nail [![2-1/2 Inch 20d Galvanized Iron Duplex Head Nails Sharp Diamond Point Double Headed Nail](https://img.engineeringhardware.com/2-1-2-Inch-20d-Galvanized-Iron-Duplex-Head-Nails-Sharp-Diamond-Point-Double-Headed-Nail.webp)](https://img.engineeringhardware.com/2-1-2-Inch-20d-Galvanized-Iron-Duplex-Head-Nails-Sharp-Diamond-Point-Double-Headed-Nail.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Nails, Staples & Tacks › Common, Ring-Shank & Specialty Nails](https://engineeringhardware.com/fastener-products/nails-staples-tacks/common-ring-shank-specialty-nails/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/2-1-2-inch-20d-galvanized-iron-duplex-head-nails-sharp-diamond-point-double-headed.md) US$504.00 – 564.00 / ton MOQ 3 tons · Final price confirmed in your quote - **Standard:** ANSI, DIN, GB, ISO, JIS - **Material:** Iron - **Head:** Two Head - **Surface Treatment:** Polished/Galvanized - **Package Size:** 43.00cm * 32.00cm * 22.00cm Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%202-1%2F2%20Inch%2020d%20Galvanized%20Iron%20Duplex%20Head%20Nails%20Sharp%20Diamond%20Point%20Double%20Headed%20Nail%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2F2-1-2-inch-20d-galvanized-iron-duplex-head-nails-sharp-diamond-point-double-headed%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 | | --- | --- | | Standard | ANSI, DIN, GB, ISO, JIS | | Type | Double Head Nails | | Material | Iron | | Head | Two Head | | Point | Diamond Point | | Surface Treatment | Polished/Galvanized | | Shank | Smooth Shank | | Transport Package | Carton/Box | | Specification | 6D-30D | | Origin | China | | HS Code | 73170000 | | Production Capacity | 3000 Tons Per Month | | Package Size | 43.00cm * 32.00cm * 22.00cm | | Package Gross Weight | 25.000kg | | Category | [Common, Ring-Shank & Specialty Nails](https://engineeringhardware.com/fastener-products/nails-staples-tacks/common-ring-shank-specialty-nails/) | ## Technical parameters | Product Name | Double Head Nails | | --- | --- | | Material | Q195/Q215 | | Shank Type | Smooth shank | | Length | 1''- 4'' | | Shank Diameter | BWG3-BWG6(2.40MM-5.16mm) | | Surface Treatment | Polished, electro galvanized, hot dipped galvanized and others | | Packing | 5kg per box, 1kg per box or bag, 500g per bag, 50lbs/carton, 25kgs per carton or as customer's requirement | | Usage | Mainly used for building construction, wooden furniture, decoration field and so on. | | Size | Gauge No. | Length Overall in. | Length Under Lower Head in. | Diam Top Head in. | Diam Lower Head in. | Approx. Number. per pound | | --- | --- | --- | --- | --- | --- | --- | | 6D | 11-1/2 | 2-7/64 | 1-3/4 | 3/16 | 17/64 | 156 | | 8D | 10-1/4 | 2-5/8 | 2-1/4 | 15/64 | 9/32 | 90 | | 10D | 9 | 3-3/16 | 2-3/4 | 1/4 | 5/16 | 59 | | 16D | 8 | 3-1/2 | 3 | 9/32 | 11/32 | 45 | | 20D | 7 | 4-1/64 | 3-1/2 | 5/16 | 3/8 | 28 | | 30D | 6 | 4-37/64 | 4 | 21/64 | 7/16 | 22 | ## Description 2-1/2 Inch 20d Galvanized Iron Duplex Head Nails Sharp Diamond Point Double Headed Nail is part of our common, ring-shank & specialty nails range (Nails, Staples & Tacks). ### Key details - **Type:** Double Head Nails - **Standard:** ANSI, DIN, GB, ISO, JIS - **Material:** Iron - **Surface Treatment:** Polished/Galvanized - **Head:** Two Head - **Point:** Diamond Point - **Shank:** Smooth Shank Available configurations include standard, material, head, surface treatment and package size. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 3 tons at US$504.00 – 564.00 per ton. 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 2-1/2 Inch 20d Galvanized Iron Duplex Head Nails Sharp Diamond Point Double Headed Nail? The listed minimum order is 3 tons, at US$504.00 – 564.00 per ton. 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 2-1/2 Inch 20d Galvanized Iron Duplex Head Nails Sharp Diamond Point Double Headed Nail? Type: Double Head Nails; Standard: ANSI, DIN, GB, ISO, JIS; Material: Iron; Surface Treatment: Polished/Galvanized; Head: Two Head; Point: Diamond Point. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include standard, material, head, surface treatment and package size. 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 common, ring-shank & specialty nails are available? The Common, Ring-Shank & Specialty Nails category lists 5,413 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/nails-staples-tacks/common-ring-shank-specialty-nails/](https://engineeringhardware.com/fastener-products/nails-staples-tacks/common-ring-shank-specialty-nails/) 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 & packing](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing.webp) Sorting & packing [![Parts warehouse](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse.webp) Parts warehouse [![Sample review](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review.webp) Sample review [![Sales office](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office.webp) Sales office [More about us →](https://engineeringhardware.com/about/) · [Request a sample or custom quote →](https://engineeringhardware.com/contact/) ## 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