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Fastener Sets & Assemblies › Assortment Kits & Mixed Fastener Sets

Customized Design High Strength Steel Rear Leaf Spring U-Bolt Kit

Updated 2026-11-04 · Markdown version

Model no. Suspension U-Bolt Kit

US$7.20100–999 pieces

US$4.201,000–9,999 pieces

US$3.6010,000+ pieces

MOQ 100 pieces · Final price confirmed in your quote

Material: Steel
Surface Finish: Smooth / Burr-Free Surface / Clear
Product Material: Stainless Steel 304/High-Quality Mild Steel
Customized: Free Design
Thread Diameter: M10 M12
Inside Width: 43mm 51mm 68mm
Surface Treatment: Galvanized/Black Finish/Painted Black
Color: White or Customized

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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

After-sales Service	/
Warranty	/
Material	Steel
Model NO.	Suspension U-Bolt Kit
Certification	ISO10012, BSCI, GMP, GSV, ISO13485, OHSAS18001, ISO14001, ISO/TS16949, ISO9001
Suitable for Car Brands	Volkswagen, WuLing, Benz, BMW, Hyundai, Honda, Toyota, Jeep, Nissan, Ford, Buick, Chery, Chevrolet, Cadillac, Geely, Roewe, Audi, Peugeot, Lexus, Volvo, Mazda
Position	Rear
OEM	Yes
Type	Suspension U-Bolt Kit
Product Name	Suspension U-Bolt Kit
Keywords	Trailer Spring Square U-Bolts Kit
Surface Finish	Smooth / Burr-Free Surface / Clear
Product Material	Stainless Steel 304/High-Quality Mild Steel
Application	Fixing Suspension Leaf-Springs to Trailer Axles
Advantages	Rustproof / Corrosion-Resistant / Long-Lasting
Axle Shape	Square/Round
Customized	Free Design
Thread Diameter	M10 M12
Inside Width	43mm 51mm 68mm
Surface Treatment	Galvanized/Black Finish/Painted Black
Product Type	Light Duty Heavy Duty
Color	White or Customized
OEM ODM	Accept
MOQ	100 Set
Transport Package	Standard Shipping Packaging or Customized
Specification	Standard or Customized
Origin	Zhejiang, China
Category	Assortment Kits & Mixed Fastener Sets

Technical parameters

SUSPENSION U-BOLT KIT
Product Name	Suspension U-Bolt Kit
Keywords	Trailer Spring Square U-Bolts Kit
Surface Finish	Smooth / Burr-Free Surface /Clear
Product Material	Stainless Steel 304/High-Quality Mild Steel
Application	Fixing Suspension Leaf-Springs To Trailer Axles
Advantages	Rustproof / Corrosion-resistant / Long-lasting
Axle Shape	Square/Round
Customized	Free Design
Thread Diameter	M10 M12
Inside Width	43mm 51mm 68mm
Surface Treatment	Galvanized/Black Finish/Painted Black
Product Type	Light Duty Heavy Duty
Color	White Or Customized
OEM ODM	Accept
MOQ	100 Set

Galvanized Suspension Square U-Bolts With Nuts And Washers
Axle Shape	Inside Width	Inside Height	Thread Length	Thread Diameter	Nut and Washer
Square	43mm	45mm	25mm	M10	W/
Square	43mm	75mm	45mm	M10	W/
Square	43mm	85mm	45mm	M10	W/
Square	43mm	100mm	45mm	M10	W/
Square	43mm	112mm	45mm	M10	W/
Square	51mm	75mm	30mm	M12	W/
Square	51mm	85mm	30mm	M12	W/
Square	51mm	100mm	45mm	M12	W/
Square	51mm	120mm	50mm	M12	W/
Square	51mm	150mm	50mm	M12	W/
Square	68mm	90mm	40mm	M12	W/
Square	68mm	145mm	50mm	M12	W/
Square	80mm	105mm	40mm	M12	W/
Square	80mm	130mm	40mm	M12	W/
Square	80mm	160mm	40mm	M12	W/
/	/	/	/	/	/
Galvanized Suspension Round U-Bolts with Nuts and Washers Nut and Washer
Axle Shape	Inside Width	Inside Height	Thread Length	Thread Diameter	Nut and Washer
Round	51mm	120mm	40mm	M12	W/
Round	60mm	140mm	50mm	M12	W/
Round	60mm	175mm	50mm	M12	W/

Description

Customized Design High Strength Steel Rear Leaf Spring U-Bolt Kit is part of our assortment kits & mixed fastener sets range (Fastener Sets & Assemblies).

Key details

Type: Suspension U-Bolt Kit
Material: Steel
Surface Treatment: Galvanized/Black Finish/Painted Black
Application: Fixing Suspension Leaf-Springs to Trailer Axles
Certification: ISO10012, BSCI, GMP, GSV, ISO13485, OHSAS18001, ISO14001, ISO/TS16949, ISO9001
Warranty: /
Position: Rear
OEM: Yes

Available configurations include material, surface finish, product material, customized and thread diameter. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 100 pieces at US$3.60 – 7.20 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 Customized Design High Strength Steel Rear Leaf Spring U-Bolt Kit?

The listed minimum order is 100 pieces, at US$3.60 – 7.20 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$7.20 for 100–999 pieces; US$4.20 for 1,000–9,999 pieces; US$3.60 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 Customized Design High Strength Steel Rear Leaf Spring U-Bolt Kit?

Type: Suspension U-Bolt Kit; Material: Steel; Surface Treatment: Galvanized/Black Finish/Painted Black; Application: Fixing Suspension Leaf-Springs to Trailer Axles; Certification: ISO10012, BSCI, GMP, GSV, ISO13485, OHSAS18001, ISO14001, ISO/TS16949, ISO9001; Warranty: /. The full specification table and any technical parameter tables are listed on this page.

Can this product be customized (OEM)?

Listed configurations include material, surface finish, product material, customized and thread diameter. 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 assortment kits & mixed fastener sets are available?

The Assortment Kits & Mixed Fastener Sets category lists 3,161 products in different sizes, materials and finishes: https://engineeringhardware.com/fastener-products/fastener-sets-assemblies/assortment-kits-mixed-fastener-sets/

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

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US$3.60 – 7.20MOQ 100 piecesGet a quote WA