--- title: "Heavy-Duty Hex Nuts for Reliable Structural Bolting Solutions" description: "Heavy-Duty Hex Nuts for Reliable Structural Bolting Solutions — Hex & Other Standard Nuts. Grade: /. MOQ 10,000 pieces, US$0.012 – 0.12." url: https://engineeringhardware.com/product/heavy-duty-hex-nuts-for-reliable-structural-bolting-solutions/ source: Engineering Hardware & Fasteners --- # Heavy-Duty Hex Nuts for Reliable Structural Bolting Solutions [![Heavy-Duty Hex Nuts for Reliable Structural Bolting Solutions](https://img.engineeringhardware.com/Heavy-Duty-Hex-Nuts-for-Reliable-Structural-Bolting-Solutions.webp)](https://img.engineeringhardware.com/Heavy-Duty-Hex-Nuts-for-Reliable-Structural-Bolting-Solutions.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Nuts › Hex & Other Standard Nuts](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/heavy-duty-hex-nuts-for-reliable-structural-bolting-solutions.md) Model no. **GB T 18230.3 - 2000** US$0.012 – 0.12 / piece MOQ 10,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel, Stainless Steel,Brass - **Head Style:** / - **Standard:** DIN, ANSI, GB, JIS, GOST, BSW - **Grade:** / - **Standards:** GB, DIN, ISO, JIS - **Finished:** Passivation, Zinc Plating, Black, Plainhdg, Yellow - **Package Size:** 10.00cm * 10.00cm * 10.00cm - **Size:** Reference standards and according to customer requirements Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Heavy-Duty%20Hex%20Nuts%20for%20Reliable%20Structural%20Bolting%20Solutions%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fheavy-duty-hex-nuts-for-reliable-structural-bolting-solutions%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, Stainless Steel,Brass | | Type | Hex Structural Nuts | | Model NO. | GB T 18230.3 - 2000 | | Connection | / | | Head Style | / | | Standard | DIN, ANSI, GB, JIS, GOST, BSW | | Grade | / | | Standards | GB, DIN, ISO, JIS | | Finished | Passivation, Zinc Plating, Black, Plainhdg, Yellow | | Certificate | ISO9001/SGS | | Selling Units | Building, Industry, Machinery | | Package | Customer'require | | Delivery Time | 15-30 | | Transport Package | Cartons & Pallets or According to Customer''s Requ | | Specification | / | | Origin | Zhejiang | | HS Code | 7318150000 | | Production Capacity | 100000000 | | Package Size | 10.00cm * 10.00cm * 10.00cm | | Package Gross Weight | 1.000kg | | Product Name | Large hex nuts for structural bolting with large width across flats GB T 18230.3 - 2000 | | Size | Reference standards and according to customer requirements | | Main Products | Non-standard parts, fasteners, stamping parts, and machined parts. | | We implement a rigorous two-stage quality assurance protocol | Pre-production sampling with dimensional verification | | Acceptable payment instruments | SWIFT transfer, LC at sight (negotiable for bulk orders) | | Category | [Hex & Other Standard Nuts](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) | ## Technical parameters | Product Name: | Large hex nuts for structural bolting with large width across flats GB T 18230.3 - 2000 | | --- | --- | | Standard: | GB T 18230.3 - 2000 | | Material: | Carbon steel / stainless steel / Brass / Aluminum / Titanium & Alloys | | Size: | Reference standards and according to customer requirements | | Finished: | Zinc Plated,Hot Dip Galvanized Steel,Dacromet,Nickel Plated,Black Oxide,Plain | | Delivery time: | Normally in 30-40 days. | | Q1. Corporate Profile & Manufacturing Capabilities | | --- | | A1: Established in 2009, we are an ISO-certified fastener manufacturer and solar mounting system solutions provider headquartered in Ningbo, China. With comprehensive R&D capabilities and vertically integrated production facilities, we serve global markets including North America, Oceania, China Domestic Market, Eastern Europe, Southeast Asia, South America, Africa, and the Middle East. Our expert | | Q2. Quality Assurance System | | A2: We implement a rigorous two-stage quality assurance protocol: Pre-production sampling with dimensional verification Full batch inspection including torque testing, salt spray analysis, and material certification prior to container loading This dual-check system ensures consistent compliance with ASTM/ISO standards. | | Q3. Core Product Portfolio | | A3: Our manufacturing expertise covers: • Industrial Fastening Solutions: Hex bolts, machine screws, locking nuts, flat washers, threaded rods, blind rivets, retaining clips, and precision-engineered CNC-machined components • Solar Energy Installation Systems: Ground-mounted & rooftop solar racking systems, PV module mounting accessories, UL-certified cable management solutions, and corrosion-resi | | A4: ✓ Free samples available (1-3 pcs standard specification) ✓ Express options: DHL/UPS/FedEx (customer's account) ✓ Prototyping service: Customized samples within 15 working days ✓ Note: Sample cost refundable upon bulk order confirmation | | Q5. Payment Terms & Trade Services | | A5: Standard commercial terms: 30% T/T deposit with 70% balance payable against Bill of Lading copy For orders under $1,000 USD, we recommend full advance payment to minimize international transaction fees Acceptable payment instruments: SWIFT transfer, LC at sight (negotiable for bulk orders) | ## Description Heavy-Duty Hex Nuts for Reliable Structural Bolting Solutions is part of our hex & other standard nuts range (Nuts). ### Key details - **Type:** Hex Structural Nuts - **Standard:** DIN, ANSI, GB, JIS, GOST, BSW - **Material:** Carbon Steel, Stainless Steel,Brass - **Grade:** / - **Size:** Reference standards and according to customer requirements - **Head Style:** / - **Connection:** / - **Standards:** GB, DIN, ISO, JIS Available configurations include material, head style, standard, grade and standards. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 10,000 pieces at US$0.012 – 0.12 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 Heavy-Duty Hex Nuts for Reliable Structural Bolting Solutions? The listed minimum order is 10,000 pieces, at US$0.012 – 0.12 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 Heavy-Duty Hex Nuts for Reliable Structural Bolting Solutions? Type: Hex Structural Nuts; Standard: DIN, ANSI, GB, JIS, GOST, BSW; Material: Carbon Steel, Stainless Steel,Brass; Grade: /; Size: Reference standards and according to customer requirements; Head Style: /. 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 standards. 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 hex & other standard nuts are available? The Hex & Other Standard Nuts category lists 8,354 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) 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 Hex & Other Standard Nuts →](https://engineeringhardware.com/fastener-products/nuts/hex-other-standard-nuts/) [![304/201 Stainless Steel Tapered Knurled Nuts Anti-Slip Tapered Nuts M6 M8 M10](https://img.engineeringhardware.com/304-201-Stainless-Steel-Tapered-Knurled-Nuts-Anti-Slip-Tapered-Nuts-M6-M8-M10.webp)](https://engineeringhardware.com/product/304-201-stainless-steel-tapered-knurled-nuts-anti-slip-tapered-nuts-m6-m8-m10/) Hex & Other Standard Nuts ### [304/201 Stainless Steel Tapered Knurled Nuts Anti-Slip Tapered Nuts M6 M8 M10](https://engineeringhardware.com/product/304-201-stainless-steel-tapered-knurled-nuts-anti-slip-tapered-nuts-m6-m8-m10/) Round Head · Customizable **US$0.006 – 0.012**MOQ 1,000 pieces [![(SNC3233D-A) Multi-Fit 32mm / 33mm T304 Stainless Steel Wheel Nut Covers](https://img.engineeringhardware.com/SNC3233D-A-Multi-Fit-32mm-33mm-T304-Stainless-Steel-Wheel-Nut-Covers.webp)](https://engineeringhardware.com/product/snc3233d-a-multi-fit-32mm-33mm-t304-stainless-steel-wheel-nut-covers/) Hex & Other Standard Nuts ### [(SNC3233D-A) Multi-Fit 32mm / 33mm T304 Stainless Steel Wheel Nut Covers](https://engineeringhardware.com/product/snc3233d-a-multi-fit-32mm-33mm-t304-stainless-steel-wheel-nut-covers/) Hexagon Head With Flange · DIN, ANSI, GB, JIS, GOST, BSW **US$0.012**MOQ 1,000 pieces [![Hexagon Copper Nut Customized Hardware Nut for Machine/Mechaical Engineering](https://img.engineeringhardware.com/Hexagon-Copper-Nut-Customized-Hardware-Nut-for-Machine-Mechaical-Engineering.webp)](https://engineeringhardware.com/product/hexagon-copper-nut-customized-hardware-nut-for-machine-mechaical-engineering/) Hex & Other Standard Nuts ### [Hexagon Copper Nut Customized Hardware Nut for Machine/Mechaical Engineering](https://engineeringhardware.com/product/hexagon-copper-nut-customized-hardware-nut-for-machine-mechaical-engineering/) Hexagon Head · DIN, ANSI, GB, JIS, GOST, BSW **US$0.0264 – 0.0528**MOQ 1,000 pieces [![GB6173 Heavy Duty Stainless Steel 304 Metric Thin Hex Jam Nuts Manufacturer](https://img.engineeringhardware.com/GB6173-Heavy-Duty-Stainless-Steel-304-Metric-Thin-Hex-Jam-Nuts-Manufacturer.webp)](https://engineeringhardware.com/product/gb6173-heavy-duty-stainless-steel-304-metric-thin-hex-jam-nuts-manufacturer/) Hex & Other Standard Nuts ### [GB6173 Heavy Duty Stainless Steel 304 Metric Thin Hex Jam Nuts Manufacturer](https://engineeringhardware.com/product/gb6173-heavy-duty-stainless-steel-304-metric-thin-hex-jam-nuts-manufacturer/) Hexagon Head · DIN, ANSI, GB **US$0.0192 – 0.024**MOQ 10,000 pieces [![China Products Carbon Steel DIN934 Grade 4 Zp Hex Nut Hexagon Nut](https://img.engineeringhardware.com/China-Products-Carbon-Steel-DIN934-Grade-4-Zp-Hex-Nut-Hexagon-Nut.webp)](https://engineeringhardware.com/product/china-products-carbon-steel-din934-grade-4-zp-hex-nut-hexagon-nut/) Hex & Other Standard Nuts ### [China Products Carbon Steel DIN934 Grade 4 Zp Hex Nut Hexagon Nut](https://engineeringhardware.com/product/china-products-carbon-steel-din934-grade-4-zp-hex-nut-hexagon-nut/) Hexagon Head · DIN, ANSI, GB, JIS, GOST, BSW **US$0.012 – 0.036**MOQ 1,000 pieces [![IKO Original High Precision Linear Ball Spline Nut Guide Shaft LSAGF10 LSAGFT10 LSAGFL10 LSAGFLT10 LSAGF12C1T1PHS21](https://img.engineeringhardware.com/IKO-Original-High-Precision-Linear-Ball-Spline-Nut-Guide-Shaft-LSAGF10-LSAGFT10-LSAGFL10-LSAGFLT10-LSAGF12C1T1PHS21.webp)](https://engineeringhardware.com/product/iko-original-high-precision-linear-ball-spline-nut-guide-shaft-lsagf10-lsagft10/) Hex & Other Standard Nuts ### [IKO Original High Precision Linear Ball Spline Nut Guide Shaft LSAGF10 LSAGFT10 LSAGFL10 LSAGFLT10 LSAGF12C1T1PHS21](https://engineeringhardware.com/product/iko-original-high-precision-linear-ball-spline-nut-guide-shaft-lsagf10-lsagft10/) Transmission · International **US$12.00 – 144.00**MOQ 1 piece [![Nickel Alloy DIN934 Hexagon Nut High Temperature Resistant Fastener for Oil & Chemical Industry](https://img.engineeringhardware.com/Nickel-Alloy-DIN934-Hexagon-Nut-High-Temperature-Resistant-Fastener-for-Oil-Chemical-Industry.webp)](https://engineeringhardware.com/product/nickel-alloy-din934-hexagon-nut-high-temperature-resistant-fastener-for-oil-chemical/) Hex & Other Standard Nuts ### [Nickel Alloy DIN934 Hexagon Nut High Temperature Resistant Fastener for Oil & Chemical Industry](https://engineeringhardware.com/product/nickel-alloy-din934-hexagon-nut-high-temperature-resistant-fastener-for-oil-chemical/) Hexagon Head · DIN, ANSI, GB, JIS, BSW **US$0.12 – 120.00**MOQ 1 piece [![Transmission Shaft Positioning Shockproof SUS301 Slotted Round Friction Ring U Nut](https://img.engineeringhardware.com/Transmission-Shaft-Positioning-Shockproof-SUS301-Slotted-Round-Friction-Ring-U-Nut.webp)](https://engineeringhardware.com/product/transmission-shaft-positioning-shockproof-sus301-slotted-round-friction-ring-u-nut/) Hex & Other Standard Nuts ### [Transmission Shaft Positioning Shockproof SUS301 Slotted Round Friction Ring U Nut](https://engineeringhardware.com/product/transmission-shaft-positioning-shockproof-sus301-slotted-round-friction-ring-u-nut/) Ring Fine U Nut · JIS **US$0.012 – 0.12**MOQ 10,000 pieces **US$0.012 – 0.12**MOQ 10,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Heavy-Duty%20Hex%20Nuts%20for%20Reliable%20Structural%20Bolting%20Solutions%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fheavy-duty-hex-nuts-for-reliable-structural-bolting-solutions%2F)