--- title: "China Factory Customized Semi Trailer Suspension Part Square U Bolt with Nuts Customizable for Truck or Trailer U Bolts" description: "China Factory Customized Semi Trailer Suspension Part Square U Bolt with Nuts Customizab… — U-Bolts & J-Bolts. MOQ 2,000 pieces, US$0.072 – 0.12." url: https://engineeringhardware.com/product/china-factory-customized-semi-trailer-suspension-part-square-u-bolt-with-nuts/ source: Engineering Hardware & Fasteners --- # China Factory Customized Semi Trailer Suspension Part Square U Bolt with Nuts Customizable for Truck or Trailer U Bolts [![China Factory Customized Semi Trailer Suspension Part Square U Bolt with Nuts Customizable for Truck or Trailer U Bolts](https://img.engineeringhardware.com/China-Factory-Customized-Semi-Trailer-Suspension-Part-Square-U-Bolt-with-Nuts-Customizable-for-Truck-or-Trailer-U-Bolts.webp)](https://img.engineeringhardware.com/China-Factory-Customized-Semi-Trailer-Suspension-Part-Square-U-Bolt-with-Nuts-Customizable-for-Truck-or-Trailer-U-Bolts.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Bolts › U-Bolts & J-Bolts](https://engineeringhardware.com/fastener-products/bolts/u-bolts-j-bolts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/china-factory-customized-semi-trailer-suspension-part-square-u-bolt-with-nuts.md) Model no. **ASME B 18.31.5** | **US$0.12**2,000–4,999 pieces | **US$0.096**5,000–9,999 pieces | **US$0.072**10,000+ pieces | | --- | --- | --- | MOQ 2,000 pieces · Final price confirmed in your quote - **Head Style:** Round - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Grade:** 4.8/8.8/10.9/12.9 - **Package Size:** 25.00cm * 25.00cm * 15.00cm - **Material:** Carbon Steel - **Standard parts:** 7-15days - **Non-standard parts:** 15-25days Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20China%20Factory%20Customized%20Semi%20Trailer%20Suspension%20Part%20Square%20U%20Bolt%20with%20Nuts%20Customizable%20for%20Truck%20or%20Trailer%20U%20Bolts%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fchina-factory-customized-semi-trailer-suspension-part-square-u-bolt-with-nuts%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 | Model NO. | ASME B 18.31.5 | | --- | --- | | Groove | Flat | | Connection | Common Bolt | | Head Style | Round | | Standard | DIN, GB, ANSI, BSW, JIS, GOST | | Grade | 4.8/8.8/10.9/12.9 | | Service | 24 Hours Online | | Quality | High-Quality | | Delivery Time | 15-25 Days | | Sample | Provided | | Product Name | U Bolt | | Transport Package | Carton+Pallet or Others | | Specification | M4-M20 | | Origin | Hebei | | Production Capacity | 50000tons/Year | | Package Size | 25.00cm * 25.00cm * 15.00cm | | Package Gross Weight | 25.000kg | | Customization | Available | | Material | Carbon Steel | | Type | Round Head | | Shipping Cost | Contact the supplier about freight and estimated delivery time. | | All our processes strictly adhere to ISO9001 | 2008 procedures. We have strict quality control from producing to delivery.Our company had strong technology support, We have cultivated a group of managers who are familiar with product quality , good at modern concept of management. | | Standard parts | 7-15days | | Non-standard parts | 15-25days | | Category | [U-Bolts & J-Bolts](https://engineeringhardware.com/fastener-products/bolts/u-bolts-j-bolts/) | ## Technical parameters | Application scenarios | Universal | | --- | --- | | place of origin | Hebei,China | | Sample | Provided | ## Description China Factory Customized Semi Trailer Suspension Part Square U Bolt with Nuts Customizable for Truck or Trailer U Bolts is part of our u-bolts & j-bolts range (Bolts). ### Key details - **Type:** Round Head - **Standard:** DIN, GB, ANSI, BSW, JIS, GOST - **Material:** Carbon Steel - **Grade:** 4.8/8.8/10.9/12.9 - **Head Style:** Round - **Groove:** Flat - **Connection:** Common Bolt - **Service:** 24 Hours Online Available configurations include head style, standard, grade, package size and material. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 2,000 pieces at US$0.072 – 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 China Factory Customized Semi Trailer Suspension Part Square U Bolt with Nuts Customizable for Truck or Trailer U Bolts? The listed minimum order is 2,000 pieces, at US$0.072 – 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. ### How does the price change with quantity? Volume pricing: US$0.12 for 2,000–4,999 pieces; US$0.096 for 5,000–9,999 pieces; US$0.072 for 10,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of China Factory Customized Semi Trailer Suspension Part Square U Bolt with Nuts Customizable for Truck or Trailer U Bolts? Type: Round Head; Standard: DIN, GB, ANSI, BSW, JIS, GOST; Material: Carbon Steel; Grade: 4.8/8.8/10.9/12.9; Head Style: Round; Groove: Flat. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include head style, standard, grade, package size and material. 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 u-bolts & j-bolts are available? The U-Bolts & J-Bolts category lists 2,391 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/bolts/u-bolts-j-bolts/](https://engineeringhardware.com/fastener-products/bolts/u-bolts-j-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 U-Bolts & J-Bolts →](https://engineeringhardware.com/fastener-products/bolts/u-bolts-j-bolts/) [![High-Strength Durable Nylon Screws with Slotted Pan Head Design](https://img.engineeringhardware.com/High-Strength-Durable-Nylon-Screws-with-Slotted-Pan-Head-Design.webp)](https://engineeringhardware.com/product/high-strength-durable-nylon-screws-with-slotted-pan-head-design/) U-Bolts & J-Bolts ### [High-Strength Durable Nylon Screws with Slotted Pan Head Design](https://engineeringhardware.com/product/high-strength-durable-nylon-screws-with-slotted-pan-head-design/) Hexagon, Square, T Head, U Bolt, Ect · DIN, ANSI, GB, JIS, BSW **US$0.36 – 1.39**MOQ 1,000 pieces [![304 Stainless Steel U-Bolts DIN3570 M5 M6 Square Type U 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