Are you sourcing reliable threaded bolts for heavy-duty fencing, gate assemblies, or industrial construction? At TJJ Ironcastings, we manufacture precision threaded bolts that meet ASTM and ISO standards, with full OEM/ODM support. Our bolts are designed to resist corrosion, handle shear loads, and provide consistent thread engagement—critical for your project’s safety and longevity. With our in-house foundry and over 20 years of casting experience, you get factory-direct pricing, fast lead times, and quality assurance that protects your brand reputation. Whether you need forged or cast threaded bolts for decorative ironwork or high-strength structural applications, TJJ is your supply partner for 2026 and beyond.

Common Procurement Challenges in Threaded Bolts Sourcing

Import managers and brand owners often face these issues when sourcing from overseas suppliers:

• Inconsistent dimensional accuracy – leading to assembly failures and field modifications.
• Unreliable tensile strength – bolts that strip or shear under load, creating safety hazards.
• Poor surface finish and corrosion resistance – rust spots appear quickly, damaging aesthetic appeal.
• Long, unpredictable lead times – disrupt project schedules and inventory management.
• Limited customization options – most suppliers only offer standard sizes, ignoring your design specs.

How TJJ Ironcastings Solves These Challenges

Our factory in Shijiazhuang, Hebei, China, has been a trusted casting and export enterprise for more than 20 years. We combine traditional craftsmanship with modern CNC machining and heat treatment to deliver threaded bolts that match your exact specifications. Here’s how we address each pain point:

Precision threading: Our CNC-controlled thread rolling and cutting processes achieve class 2A/2B fit (UNC/UNF) and metric 6g/6H, ensuring interchangeability.

Material & strength validation: We conduct hardness tests (Rockwell), tensile testing, and salt spray corrosion testing to verify compliance with ASTM A307, A354, SAE J429, and ISO 898-1.

On-time delivery: With a dedicated production capacity of 500 tons per month, our standard lead time is 15–30 days, and we offer 24/7 shipment tracking for FOB/CIF orders.

Threaded Bolts Specifications & Advantages

Note: All technical parameters are based on typical production runs. Final specifications must be confirmed in the purchase order. Please consult our engineering team for project-specific requirements.

Certifications & Compliance for the US Market (2026)

Our factory operates under an ISO 9001:2015 quality management system (certified by SGS). We also support exporting to the USA with the following documentation and standards:

• ASTM compliance: Bolts can be produced to meet ASTM A307 (carbon steel), A354 (alloy steel quenched & tempered), and F1554 (anchor bolts) specifications.
• SAE J429 compliance: Grades 2, 5, and 8 available with mill test reports.
• RoHS & REACH declarations for surface finishes (pursuant to EU and US import standards).
• PFI (Pipe Fabrication Institute) standards – if threads are required for pipe fittings.
• CE marking (for construction products, upon request).

We regularly ship to American contractors, fencing suppliers, and distribution chains, and we assist with customs clearance documentation including CBP Single Entry Bond or NAFTA/CUSMA certificates if needed.

Application Scenarios: Where Our Threaded Bolts Deliver Value

Commercial Terms & Operational Transparency

• MOQ: 500 pcs for standard sizes (M6–M20). For custom specifications or non‑standard thread forms, MOQ is typically 2,000–5,000 pcs depending on tooling requirements. Lower MOQs available through our standard stock program for select sizes.
• Lead Time: 15–25 working days for standard orders (≤5,000 pcs). Larger or custom orders: 25–35 working days. Expedited shipping (air freight) available for urgent small batches.
• OEM/ODM Design: We accept customer drawings (PDF, DXF, STEP) or reverse-engineered samples. We can recommend material and finish improvements based on your application environment.
• Packaging: Industrial bulk (poly bags, cartons, pallets) or retail-ready display packaging with branding. We can provide barcode labeling, part numbers, and UPC codes for US distributors.
• Logistics: FOB Tianjin, CIF to major US ports (Los Angeles, Savannah, New York). We handle book shipping, container loading, and export customs clearance.
• After-sales Support: 12-month warranty on manufacturing defects, with free replacement or credit for non-conformity reported within 30 days of delivery. Technical support available via email or video call.

What Our Buyers Say About TJJ Threaded Bolts

Mark Thompson – Owner, Thompson Fence Supply, Florida, USA

“We’ve used TJJ’s threaded bolts for our iron fence kits for two years. The thread consistency is excellent – no cross‑threading during assembly. Lead times are honest, and the hot‑dip galvanized finish survives Miami’s humidity without rust. A solid partner for our business.”

Order: 15,000 pcs of 5/8-11 UNC x 3.5″ galvanized bolts, Jan 2025 & repeat orders

Laura Van den Berg – Sourcing Manager, EuroGate Fabrications, Netherlands

“We switched to TJJ because they offered custom metric bolts with our own head stamp. The technical team helped us choose 316 stainless for a waterfront gate project. The bolts arrived within three weeks, and the salt spray test results exceeded our expectations. Excellent OEM support.”

Custom M12×1.75 bolts, 8,000 pcs, delivered to Rotterdam, 2025

James Reed – Director of Procurement, Reed Industrial Supply, Canada

“We needed high‑strength grade 8 bolts for heavy equipment assembly in Ontario. TJJ provided full mill test reports and proof‑load certificates with the shipment. The pricing was competitive, and the quality matched our previous US supplier at a 25% cost saving. Repeat order placed.”

Grade 8, 3/4-10 x 6″ bolts, 20,000 pcs, March 2026

threaded screw threaded fastener custom bolts

Antonio Silva – Owner, Silva Arquitectura, São Paulo, Brazil

“For our decorative ironwork projects, we require bolts with a consistent black oxide finish. TJJ worked with us on the surface quality and even provided a color‑matched touch‑up pen for scratches. The attention to detail is rare. The bolts look professional and perform well.”

Black oxide, M10 x 40mm threaded bolts, 5,000 pcs, 2026

Ryan O’Connor – Import Manager, FastenDirect, UK

“TJJ helped us consolidate several fastener SKUs into one order. Their ability to produce multiple thread sizes with consistent tolerances reduced our inspection burden. Even with mixed pallets, packaging was clearly labeled. Good communication throughout.”

Mixed order: 12 SKUs, total 65,000 pcs, delivered to London, 2025

Why TJJ Stands Out: A Quick Comparison

Our Factory & Infrastructure – Proof of Capability

Foundry production line with automated molding

CNC thread rolling machines for precision threads

Inspection lab with optical measuring & hardness testers

Our factory covers an area of 18,000 square meters and employs 120+ skilled workers. We are equipped with 35 CNC machining centers, 4 automatic thread rolling lines, and full heat treatment capabilities. This infrastructure enables us to produce consistent, high-volume runs of threaded bolts while maintaining flexibility for custom orders.

Ready to Secure Your Supply of Precision Threaded Bolts?

Contact our team for a quote, free sample, or design consultation. We typically respond within 4–8 business hours.

Email: sindyhao2014@163.com

Tel / WhatsApp: +86-15511680668

Or visit our contact page: https://www.tjjironcastings.com/contactus.html

We look forward to helping you build with confidence in 2026.