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Bolts › U-Bolts & J-Bolts

China Factory Customized Semi Trailer Suspension Part Square U Bolt with Nuts Customizable for Truck or Trailer U Bolts

Updated 2026-11-04 · Markdown version

Model no. ASME B 18.31.5

US$0.122,000–4,999 pieces

US$0.0965,000–9,999 pieces

US$0.07210,000+ 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

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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

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/

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

More about us → · Request a sample or custom quote →

Request a quote for this product

US$0.072 – 0.12MOQ 2,000 piecesGet a quote WA