--- title: "High Strength Extra-Large Extension Bolt" description: "High Strength Extra-Large Extension Bolt — Structural & Heavy Hex Bolts. Material: Carbon Steel, Standard: DIN, ANSI, GB, JIS. MOQ 1,000 pieces." url: https://engineeringhardware.com/product/high-strength-extra-large-extension-bolt/ source: Engineering Hardware & Fasteners --- # High Strength Extra-Large Extension Bolt [![High Strength Extra-Large Extension Bolt](https://img.engineeringhardware.com/High-Strength-Extra-Large-Extension-Bolt.webp)](https://img.engineeringhardware.com/High-Strength-Extra-Large-Extension-Bolt.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Bolts › Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/high-strength-extra-large-extension-bolt.md) Model no. **specific** Price on request MOQ 1,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Hexagonal - **Standard:** DIN, ANSI, GB, JIS - **Grade:** 12.9 - **Finish:** Hot-Working Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20High%20Strength%20Extra-Large%20Extension%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fhigh-strength-extra-large-extension-bolt%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 | Carbon Steel | | Type | Hexagon Head | | Model NO. | specific | | Connection | Hinged Bolts | | Head Style | Hexagonal | | Standard | DIN, ANSI, GB, JIS | | Grade | 12.9 | | Application | Building | | Finish | Hot-Working | | Transport Package | Carton | | Specification | 15.00cm * 10.00cm * 5.00cm | | Origin | China | | HS Code | 7616100000 | | Production Capacity | 2 000 Tons/Years | | Category | [Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) | ## Description High Strength Extra-Large Extension Bolt is part of our structural & heavy hex bolts range (Bolts). ### Key details - **Type:** Hexagon Head - **Standard:** DIN, ANSI, GB, JIS - **Material:** Carbon Steel - **Grade:** 12.9 - **Head Style:** Hexagonal - **Finish:** Hot-Working - **Connection:** Hinged Bolts - **Application:** Building Available configurations include material, head style, standard, grade and finish. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 1,000 pieces. 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 High Strength Extra-Large Extension Bolt? The listed minimum order is 1,000 pieces. 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 High Strength Extra-Large Extension Bolt? Type: Hexagon Head; Standard: DIN, ANSI, GB, JIS; Material: Carbon Steel; Grade: 12.9; Head Style: Hexagonal; Finish: Hot-Working. 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 finish. 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 structural & heavy hex bolts are available? The Structural & Heavy Hex Bolts category lists 2,565 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) 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/) ## Request a quote for this product ## Related products [All Structural & Heavy Hex Bolts →](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) [![Corrosion Resistant Al6005-T5 Tin Roof Clamp for Standing Seam Roof, High Strength and Reliable with SUS304 Bolts](https://img.engineeringhardware.com/Corrosion-Resistant-Al6005-T5-Tin-Roof-Clamp-for-Standing-Seam-Roof-High-Strength-and-Reliable-with-SUS304-Bolts.webp)](https://engineeringhardware.com/product/corrosion-resistant-al6005-t5-tin-roof-clamp-for-standing-seam-roof-high-strength/) Structural & Heavy Hex Bolts ### [Corrosion Resistant Al6005-T5 Tin Roof Clamp for Standing Seam Roof, High Strength and Reliable with SUS304 Bolts](https://engineeringhardware.com/product/corrosion-resistant-al6005-t5-tin-roof-clamp-for-standing-seam-roof-high-strength/) BIPV · Aluminum Alloy **US$0.74**MOQ 10,000 pieces [![High Strength Mining Anchor Rod Nut Mushroom Head Hot Forged Bolt Fastener](https://img.engineeringhardware.com/High-Strength-Mining-Anchor-Rod-Nut-Mushroom-Head-Hot-Forged-Bolt-Fastener.webp)](https://engineeringhardware.com/product/high-strength-mining-anchor-rod-nut-mushroom-head-hot-forged-bolt-fastener/) Structural & Heavy Hex Bolts ### [High Strength Mining Anchor Rod Nut Mushroom Head Hot Forged Bolt Fastener](https://engineeringhardware.com/product/high-strength-mining-anchor-rod-nut-mushroom-head-hot-forged-bolt-fastener/) ASTM · Steel **US$0.42 – 4.79**MOQ 1,000 kilograms [![High Strength Grade 8.8 10.9 12.9 Carbon Steel DIN933 DIN931 Hex Head Bolt with Nut Washer for Steel Structure Engineering Machinery](https://img.engineeringhardware.com/High-Strength-Grade-8-8-10-9-12-9-Carbon-Steel-DIN933-DIN931-Hex-Head-Bolt-with-Nut-Washer-for-Steel-Structure-Engineering-Machinery.webp)](https://engineeringhardware.com/product/high-strength-grade-8-8-10-9-12-9-carbon-steel-din933-din931-hex-head-bolt-with-nut/) Structural & Heavy Hex Bolts ### [High Strength Grade 8.8 10.9 12.9 Carbon Steel DIN933 DIN931 Hex Head Bolt with Nut Washer for Steel Structure Engineering Machinery](https://engineeringhardware.com/product/high-strength-grade-8-8-10-9-12-9-carbon-steel-din933-din931-hex-head-bolt-with-nut/) Hexagon Head · DIN, GB, DIN933, DIN931, GB/T5782, GB/T5783 **US$0.48 – 0.60**MOQ 5,000 pieces [![A320 L7 A193 B16 Heavy Big Size Black Unc Fully Threaded Structural Hex Bolt with Nut](https://img.engineeringhardware.com/A320-L7-A193-B16-Heavy-Big-Size-Black-Unc-Fully-Threaded-Structural-Hex-Bolt-with-Nut.webp)](https://engineeringhardware.com/product/a320-l7-a193-b16-heavy-big-size-black-unc-fully-threaded-structural-hex-bolt-with-nut/) Structural & Heavy Hex Bolts ### [A320 L7 A193 B16 Heavy Big Size Black Unc Fully Threaded Structural Hex Bolt with Nut](https://engineeringhardware.com/product/a320-l7-a193-b16-heavy-big-size-black-unc-fully-threaded-structural-hex-bolt-with-nut/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.096 – 0.14**MOQ 10,000 pieces [![OEM Factory Stock Hot Dipped Galvanized Heavy Hex Bolt with Nut and Washers](https://img.engineeringhardware.com/OEM-Factory-Stock-Hot-Dipped-Galvanized-Heavy-Hex-Bolt-with-Nut-and-Washers.webp)](https://engineeringhardware.com/product/oem-factory-stock-hot-dipped-galvanized-heavy-hex-bolt-with-nut-and-washers/) Structural & Heavy Hex Bolts ### [OEM Factory Stock Hot Dipped Galvanized Heavy Hex Bolt with Nut and Washers](https://engineeringhardware.com/product/oem-factory-stock-hot-dipped-galvanized-heavy-hex-bolt-with-nut-and-washers/) Hexagon Head · DIN, ANSI, GB, JIS **US$0.0144 – 0.25**MOQ 3,000 pieces [![China Supplier Galvanized Grade8.8 DIN7990 Steel Structural Hex Bolt](https://img.engineeringhardware.com/China-Supplier-Galvanized-Grade8-8-DIN7990-Steel-Structural-Hex-Bolt.webp)](https://engineeringhardware.com/product/china-supplier-galvanized-grade8-8-din7990-steel-structural-hex-bolt/) Structural & Heavy Hex Bolts ### [China Supplier Galvanized Grade8.8 DIN7990 Steel Structural Hex Bolt](https://engineeringhardware.com/product/china-supplier-galvanized-grade8-8-din7990-steel-structural-hex-bolt/) Hexagon Head · DIN, ANSI, GB, JIS, BSW **US$0.12**MOQ 10,000 tons [![Ms Steel Alloy Steel China High Strength Hex Bolt with Nut and Washer Assembled F10t A325 Bolt](https://img.engineeringhardware.com/Ms-Steel-Alloy-Steel-China-High-Strength-Hex-Bolt-with-Nut-and-Washer-Assembled-F10t-A325-Bolt.webp)](https://engineeringhardware.com/product/ms-steel-alloy-steel-china-high-strength-hex-bolt-with-nut-and-washer-assembled-f10t/) Structural & Heavy Hex Bolts ### [Ms Steel Alloy Steel China High Strength Hex Bolt with Nut and Washer Assembled F10t A325 Bolt](https://engineeringhardware.com/product/ms-steel-alloy-steel-china-high-strength-hex-bolt-with-nut-and-washer-assembled-f10t/) Hexagon Head · DIN, ANSI, GB, JIS, as **US$0.24 – 1.44**MOQ 1,000 sets [![High-Strength Custom M8 Hexagonal Flange Titanium Bolts, Titanium Screws, Titanium Fasteners](https://img.engineeringhardware.com/High-Strength-Custom-M8-Hexagonal-Flange-Titanium-Bolts-Titanium-Screws-Titanium-Fasteners.webp)](https://engineeringhardware.com/product/high-strength-custom-m8-hexagonal-flange-titanium-bolts-titanium-screws-titanium/) Structural & Heavy Hex Bolts ### [High-Strength Custom M8 Hexagonal Flange Titanium Bolts, Titanium Screws, Titanium Fasteners](https://engineeringhardware.com/product/high-strength-custom-m8-hexagonal-flange-titanium-bolts-titanium-screws-titanium/) Hexagon Head · DIN, ANSI, GB **US$1.20 – 12.00**MOQ 1,000 pieces **Price on request**MOQ 1,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20High%20Strength%20Extra-Large%20Extension%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fhigh-strength-extra-large-extension-bolt%2F)