What is your payment term?

30% deposit and the balance should be paid before delivery. But for small amount order, we also have paypal account.

Yes. OEM is acceptable to us. We can produce according to your drawings.

Guardrail Bolt

Name: ASTM 307A Steel Carriage Bolt/ Coach Bolt / Guardrail Bolt
Brand: Jiaxing Sini Fastener Co., Ltd.
SKU: 701053485

Zhejiang, ChinaJiaxing Sini Fastener Co., Ltd.

US$850.00-900.00

1 Ton

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel

Type

Round Head

Model NO.

1/4, 5/16, 3/8, 1/2, 5/8, 3/4

Connection

Common Bolt

Head Style

Round

Standard

DIN, ANSI

Grade

4.8

Application

Machinery, Environmental, Building

Finish

Blue-White Zinc Plated

Product Name

Carriage Bolt/ Coach Screw

Diamater

(Cold Heading) 1/4" -3/4"; M5-M20 / (Hot Forged)

Class

ASTM A307 Gr.a / 2, 5, 8; Gr4.8 / 8.8 /10.9

Test

Pass The Go & No Go Gauge Test

Transport Package

Carton +Pallet

Specification

1/4-3/4

Origin

China

HS Code

731815090

Production Capacity

10000ton/Year

Key features

Versatile Material Options: Available in Carbon Steel and Stainless Steel for diverse applications.

Comprehensive Size Range: Diameters from 1/4 inch to 2 inches, covering M5 to M20 metric sizes.

Multiple Finish Choices: Options include Plain, Zinc Plated, Hot Dip Galvanized, and Black Oxide.

Strict Quality Testing: All products pass Go & No Go Gauge tests to ensure dimensional accuracy.

OEM and ODM Services: Full customization available based on customer drawings and designs.

Competitive Pricing: Cost-effective solutions with high quality steel materials guaranteed.

Flexible Shipping Methods: Supports Express, Air, and Sea freight for global delivery needs.

Sample Availability: Free samples provided for quality testing upon customer request.

Company profile

R&D CapabilitiesCustomization from Samples100% Finished Products InspectionManagement Certification

Jiaxing Sini Fastener Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 15 Years CertifiedNearest Port: Shanghai Port; Ningbo PortAverage Response Time: ≤15h

AI-Powered supplier vetting

SummaryThe supplier operates in hardware and mechanical equipment, with stated import/export licensing and products including fasteners. It reports OEM and ODM capability, broad customization options, and manufacturing equipment that includes punching, rolling, deburring, laser cutting, bending, riveting, and hydraulic machines. Export sales account for 90% of total sales, and stated quotation terms include FOB, CFR, CIF, and EXW. However, the available evidence indicates important operational weaknesses: only one production line is reported, there is no valid manufacturing-capacity contract with related subcontractors, no inventory or overseas service infrastructure, no written supplier-service assessment procedure, and no documented corrective-action, complaint-handling, quality-assurance, or traceability systems. No certification information or specific customer cases are provided.

Supplier typeThe supplier is presented as a hardware and mechanical-equipment business, with licensed import/export and technology-import/export activities, plus sales and R&D of hardware products, mechanical equipment, and mechanical components. Its stated product scope includes fasteners such as carriage bolts, indicating a manufacturer/supplier focused on hardware and related mechanical products.

After-Sales capabilityThe supplier has no stated overseas agents or branches, overseas warehouse, overseas showroom, or overseas service countries, and it has no written procedures or records for corrective and preventive actions or customer-complaint handling. These explicit gaps indicate weak documented after-sales and international service infrastructure.

Production capacityThe supplier lists multiple processing machines and reports one production line, a one-month average lead time in both peak and off-season, and 90% export sales. Nevertheless, it lacks a valid manufacturing-capacity contract with related subcontractors, does not continuously reconcile production quantities, has no outsourcing SOP, and has no quality assurance or raw-material traceability, creating material production-control deficiencies.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization through its design and R&D capabilities. It also states that special parts can be manufactured, providing clear evidence of broad customization capability.

Product Q&A

Q:What about your company?

We're a trading company and also have our own factory with professional team, we will try our best to satisfy your requirements.

Q:When can I get the price?

We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price, please tell us in your email so that we will regard your inquiry priority.

Q:Can I have a sample for it?

Yes, we welcome sample order to test and check quality.

Q:How to proceed an order for it?

Firstly let us know your requirements or application. Secondly We quote according to your requirements or our suggestions. Thirdly customer confirms the samples and places deposit for formal order. Fourthly We arrange the production.

Q:What about the delivery time?

Normally the delivery time is around 45 days after payment.