--- title: "Premium A325 Bolt Nut, Custom Size with High-Precision Lock" description: "Premium A325 Bolt Nut, Custom Size with High-Precision Lock — Structural & Heavy Hex Bolts. MOQ 100,000 pieces, US$1,584 – 1,800." url: https://engineeringhardware.com/product/premium-a325-bolt-nut-custom-size-with-high-precision-lock/ source: Engineering Hardware & Fasteners --- # Premium A325 Bolt Nut, Custom Size with High-Precision Lock [![Premium A325 Bolt Nut, Custom Size with High-Precision Lock](https://img.engineeringhardware.com/Premium-A325-Bolt-Nut-Custom-Size-with-High-Precision-Lock.webp)](https://img.engineeringhardware.com/Premium-A325-Bolt-Nut-Custom-Size-with-High-Precision-Lock.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/premium-a325-bolt-nut-custom-size-with-high-precision-lock.md) US$1,584 – 1,800 / piece MOQ 100,000 pieces · Final price confirmed in your quote - **Material:** Stainless Steel - **Head Style:** Hexagonal - **Standard:** DIN, ANSI, GB, JIS, BSW, GOST, Flange Nut - **Grade:** 12.9 - **Finish:** Color-Zinc Plated - **Coating:** as Requested by Buyer - **Size:** as Requested by Buyer - **Materials and surfaces can be tailored with precision as follows:** Mechnical Property Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Premium%20A325%20Bolt%20Nut%2C%20Custom%20Size%20with%20High-Precision%20Lock%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fpremium-a325-bolt-nut-custom-size-with-high-precision-lock%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 | | Type | Hexagon Head | | Connection | Common Bolt | | Head Style | Hexagonal | | Standard | DIN, ANSI, GB, JIS, BSW, GOST, Flange Nut | | Grade | 12.9 | | Application | Chemical Industry | | Finish | Color-Zinc Plated | | Coating | as Requested by Buyer | | Size | as Requested by Buyer | | Transport Package | Carton + Pallet | | Specification | 25KG/Carton | | Origin | China | | HS Code | 731816 | | Production Capacity | 2500 Ton/Month | | Materials and surfaces can be tailored with precision as follows | Mechnical Property | | Packaging Details | Our Custom Size 4.8 Railway Fish Bolt Plate and Nut with Buyer Coating is expertly packaged to ensure perfection. Each unit is securely housed in a 25kg carton, meticulously designed to meet your specific requirements. Opt for pallet sizes ranging from 1.5 to 2.5 tons to maximize efficiency and safety during transit, guaranteeing your products arrive in immaculate condition. | | Note | Please contact us for a personalized re-quote prior to placing an order, as fluctuations in material prices may impact the total cost. We are committed to providing transparent and current pricing. | | A | About 30000 tons per year. | | Q | Do you have an ISO 9001 certificate? | | Category | [Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) | ## Technical parameters | Product Name | Hex Large Washer Flange Nuts | | --- | --- | | Standard | DIN ISO ANSI/ASME JIS | | Material | Carbon Steel, Alloy Steel, Brass, Stainless Steel 201, 665, 667, 304, 316 etc | | Surface Treatment | Black, Zinc Plate, Dacromet, Ruspert, Magni, Zinc-Nickel, Plain, HDG, Polished, Passivation | | Size | M3 M4 M5 M6 M8 M10 M12 M14 M16 M20 M22-M30 or as per drawing | | Grade | 4/5/6/8/10/12/A2-50/A2-70/A4-50/A4-70/A4-80/H59/H62 | | Application | Industry ,Machinery ,Constructrion | | Certificate | ISO9001, CE, GS, RoHS, Mill Certificate, 3.1 Quality Certificate | | Feature | High Strength , Corrosion-resistance , Rust-proof | | Lead Time | 7-25 days | | Mechnical Property | Material | Surface Treatment | | --- | --- | --- | | Class 4 / 6 / 8/ 10 /12 | C45 40Cr 35CrMo 42CrMo 304 316 35K...... | ♦Yellow Zinc ♦Zinc Plated ♦Black Oxide ♦Phosphate ♦Dacromet ♦Geomet | | Our Factory Introduction | | --- | ## Description Premium A325 Bolt Nut, Custom Size with High-Precision Lock is part of our structural & heavy hex bolts range (Bolts). ### Key details - **Type:** Hexagon Head - **Standard:** DIN, ANSI, GB, JIS, BSW, GOST, Flange Nut - **Material:** Stainless Steel - **Grade:** 12.9 - **Size:** as Requested by Buyer - **Head Style:** Hexagonal - **Finish:** Color-Zinc Plated - **Connection:** Common Bolt 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 100,000 pieces at US$1,584 – 1,800 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 Premium A325 Bolt Nut, Custom Size with High-Precision Lock? The listed minimum order is 100,000 pieces, at US$1,584 – 1,800 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 Premium A325 Bolt Nut, Custom Size with High-Precision Lock? Type: Hexagon Head; Standard: DIN, ANSI, GB, JIS, BSW, GOST, Flange Nut; Material: Stainless Steel; Grade: 12.9; Size: as Requested by Buyer; Head Style: Hexagonal. 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 [![New Heavy Hex Structural Bolt and Nut 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Bolt](https://engineeringhardware.com/product/hdg-finish-black-finish-twist-off-type-tension-control-structural-bolts-hex-head/) Round Head · DIN **US$0.012 – 0.12**MOQ 1,000 pieces **US$1,584 – 1,800**MOQ 100,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Premium%20A325%20Bolt%20Nut%2C%20Custom%20Size%20with%20High-Precision%20Lock%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fpremium-a325-bolt-nut-custom-size-with-high-precision-lock%2F)