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Bolts › U-Bolts & J-Bolts

High Strength Carbon Steel U Bolt for Bridge Construction and Infrastructure Projects

Updated 2026-11-04 · Markdown version

Model no. U Bolt

US$3.02500–4,999 pieces

US$0.255,000–9,999 pieces

US$0.01210,000+ pieces

MOQ 500 pieces · Final price confirmed in your quote

Head Style: Round
Standard: DIN, ANSI, GB, JIS
Grade: A2-50~A4-80
Finish: Plain, Zinc Plated, Dacromet, H.D.G
Length: 3mm-3000mm
Thread: Unc Unf Metric
Package Size: 30.00cm * 20.00cm * 14.00cm
Material: Carbon Steel, Alloy Steel, Stainless Steel

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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.	U Bolt
Connection	Common Bolt
Head Style	Round
Standard	DIN, ANSI, GB, JIS
Grade	A2-50~A4-80
Application	Machinery, Chemical Industry, Environmental, Building
Finish	Plain, Zinc Plated, Dacromet, H.D.G
MOQ	500PCS
Length	3mm-3000mm
Certificate	ISO9001
Thread	Unc Unf Metric
Delivery Time	10-15 Days
Quality Control	100% Inspection
Manufacture Processing	Cold Forging/ Hot Forging
Experience	for 20 Years
Delivery Method	by Sea, by Air or by Express Service
Transport Package	Bulk,Carton,Bag,Small Packing,Small Box,Poly Bag
Specification	M3-M72(3/16''- 4'')
Origin	China
HS Code	7318159001
Production Capacity	10000000PCS/Month
Package Size	30.00cm * 20.00cm * 14.00cm
Package Gross Weight	25.000kg
Lead Time	10 days (1 - 500 Pieces) To be negotiated ( > 500 Pieces)
Customization	Available
Material	Carbon Steel, Alloy Steel, Stainless Steel
Type	Round Head
Shipping Cost	Contact the supplier about freight and estimated delivery time.
Category	U-Bolts & J-Bolts

Technical parameters

Material	1.StainlessSteel:SS201,SS303,SS304,SS316,SS410,SS4202.Steel:C45(K1045), C46(K1046),C203.Carbon Steel: 1010,1035,1045
Grade	SAE J429 Gr.2, 5,8; ASTM A307Gr.A,A193 B7,B8,B8M,A194 2H, Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 and etc.
Finish	Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G and etc.
Thread	UNC,UNF,UEF,UN,UNS
Standard	ISO, DIN, ANSI, JIS, BS and Non-standard
Sample Service	Samples are all in free.
Certificate	ISO9001,CE, SGS, BV
Packing	Bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand
Payment terms	FOB, CIF, CFR, L/C, or others.
Delivery method	by sea, by air or by express service
Application	Structural Steel; Metal Buliding; Oil&Gas; Tower&Pole; Wind Energy; Mechanical Machine; Automobile: Home Decorating and etc.

Description

High Strength Carbon Steel U Bolt for Bridge Construction and Infrastructure Projects is part of our u-bolts & j-bolts range (Bolts).

Key details

Type: Round Head
Standard: DIN, ANSI, GB, JIS
Material: Carbon Steel, Alloy Steel, Stainless Steel
Grade: A2-50~A4-80
Thread: Unc Unf Metric
Length: 3mm-3000mm
Head Style: Round
Finish: Plain, Zinc Plated, Dacromet, H.D.G

Available configurations include head style, standard, grade, finish and length. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

Ordering through Engineering Hardware & Fasteners

Minimum order is 500 pieces at US$0.012 – 3.02 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 High Strength Carbon Steel U Bolt for Bridge Construction and Infrastructure Projects?

The listed minimum order is 500 pieces, at US$0.012 – 3.02 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$3.02 for 500–4,999 pieces; US$0.25 for 5,000–9,999 pieces; US$0.012 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 High Strength Carbon Steel U Bolt for Bridge Construction and Infrastructure Projects?

Type: Round Head; Standard: DIN, ANSI, GB, JIS; Material: Carbon Steel, Alloy Steel, Stainless Steel; Grade: A2-50~A4-80; Thread: Unc Unf Metric; Length: 3mm-3000mm. 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, finish and length. 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 →

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US$0.012 – 3.02MOQ 500 piecesGet a quote WA