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Basic Definition & Alias Explanation
The riding bolt shares the unified English official nameU-bolt. Classified as a non-standard fastener, it gets the universal name U-bolt due to its distinctive U-shaped structure. Threads are fabricated on both straight ends for matched assembly with hexagon nuts. Functionally, it is designed to clamp and fasten tubular components including water pipes, oil pipelines and circular poles, as well as sheet structural parts represented by automobile leaf springs. The alias "riding bolt" derives from its working principle: it fastens two stacked components just like a person riding on a horse, which is vividly recognized in global mechanical industries.
Supplied by JIAXING DAITONG FASTENER CO., LTD., a professional direct Chinese fastener manufacturer with over 12 years of OEM & ODM production experience, our hot dip galvanized U bolts cover two mainstream structural types: standard semicircle U type and square bend type, all matched with complete hexagon nuts and flat washers for one-stop shipment. As a reliable bulk and small batch custom U bolt supplier from China, we support low MOQ personalized customization for global engineering, pipeline, automotive and infrastructure buyers, meeting fragmented procurement demands for European, American, Southeast Asian and Middle Eastern markets.
The traditional semicircular arc U-bolt is most widely applied in heavy-duty trucks and commercial vehicles. Its core function is to stabilize vehicle axles and chassis frames, especially for fastening automobile leaf springs and connecting suspension components. It can offset vibration impact during long-distance driving and prevent loosening of chassis structural parts under bumpy road conditions.
Except for conventional semicircle U-bolts, we also produce full-series special-shaped U-bolts covering square right angle, triangle and oblique triangle bending types. Square right angle bend variants fit perfectly with square steel tubes and rectangular profile beams, solving slipping defects of arc U-bolts on flat square surfaces. Triangular and oblique triangle types are customized for irregular pipeline and bracket fastening scenarios.
Cross-industry universal application scope: building structural installation, general mechanical parts connection, vehicle and ship manufacturing, bridge reinforcement, tunnel supporting and railway track auxiliary fixation.
All U-bolt raw material selection is customized according to on-site service environment. Core detectable performance indicators include material density, bending strength, impact toughness, compressive strength, elastic modulus, tensile strength, high/low temperature resistance and surface color. We conduct full-index third-party testing for customized orders to match corrosion, vibration and extreme temperature working conditions.
We supply three mainstream material series covering all market demands:
Ordinary Carbon Steel: Q235A, the most cost-effective option for indoor dry and non-corrosive environments
Alloy Structural Steel: Q345B, high tensile strength for heavy load, high vibration and outdoor bearing scenarios
Stainless Steel: 201, 304, 321, 304L, 316, 316L. 201 for dry indoor use; 304/321 for general outdoor rainproof use; 304L/316/316L for coastal salt fog, marine and strong acid corrosive environments
Simplified material division for customer reference: all U-bolts are simply categorized into carbon steel (Q235, Q345) and stainless steel series in daily export quotation.
Our carbon steel and stainless steel U-bolts strictly comply with Chinese industry standard: JB/ZQ4321-2006. All dimensional tolerance, thread precision and bending angle meet the standard requirements, compatible with European DIN and American ASTM matching nuts for cross-standard assembly.
Different from cheap electro-galvanized fasteners with thin coating, our hot dip galvanized variants adopt strict 450℃ molten zinc immersion process. The average zinc coating thickness reaches 85-120μm, forming a dual protective layer of outer pure zinc and inner iron-zinc alloy. This professional anti-corrosion treatment delivers 20+ years of service life in coastal salt fog, rainy wetland, highway outdoor and mine corrosive environments, 5 times longer than ordinary electro-galvanized U bolts.
Mechanical Performance: Raw material passes SGS tensile and salt spray testing; no bending fracture under rated dynamic load
Surface Quality: Uniform zinc coating coverage, no missing plating; post-galvanizing passivation to avoid white rust during ocean shipping
Complete Matching Accessories: Every set is equipped with same-batch hot dip galvanized hex nuts and washers to prevent galvanic corrosion between mating parts
Most Chinese U bolt factories only support bulk order production, while JIAXING DAITONG FASTENER breaks industry MOQ limits to provide low minimum order small batch customization for global distributors, engineering contractors and small equipment manufacturers. Detailed customized items:
Dimensional customization: Custom outer width, inner span, leg length, thread length for semicircle, square, triangular U-bolts; support drawing & sample-based production
Material & surface customization: Switch among carbon steel, alloy steel, full stainless steel; alternative finishes including electro-galvanized, black oxide, sherardized besides hot dip galvanizing
Packaging & labeling customization: Neutral export carton, pallet packaging, private logo printing, barcode labeling for retail resale
Custom MOQ: Minimum 50 sets for non-standard small batch orders, 7 working days lead time for standard inventory goods, 15 working days for customized non-standard products. Free pre-production samples and CAD drawing confirmation are provided before mass production.
JIAXING DAITONG FASTENER CO., LTD. is a verified direct Chinese non-standard fastener manufacturer located in Jiaxing, Zhejiang, with convenient logistics access to Shanghai and Ningbo international ports. We hold ISO9001 quality management system certification, CE export certification and customs A-level credit qualification. We support FOB, CIF, DDP global trade terms, and provide complete export documents including material test reports, salt spray inspection reports and standard compliance certificates for customs clearance worldwide.
Q: What is the other name of U-bolt?A: It is also named riding bolt, referring to its riding-type fastening working principle.
Q: Do you follow official industry standards?A: All standard U-bolts follow JB/ZQ4321-2006, and we can produce non-standard customized sizes out of the standard scope.
Q: Can you provide small batch custom stainless steel U-bolts?A: Yes, we offer low-MOQ custom service for all material and shape types with no extra mold fees for regular non-standard sizes.
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