What is your minimum order quantity?

Our MOQ is 500 pieces for standard fasteners. For custom/OEM orders, MOQ is typically 1,000-5,000 pieces. We've supplied 500+ clients across 20+ African countries since 2012, with orders ranging from 500 to 500,000 pieces per shipment.

What payment methods do you accept?

We accept T/T (30% deposit, 70% before shipment), L/C at sight, PayPal (for samples under $500), and Western Union. We also offer Trade Assurance via Alibaba for orders up to $100,000.

What are your most popular fastener products?

Our best-selling products are: 1) Drywall screws (3.5x25mm bugle head, fine thread) - 25% of orders, 2) Self-drilling TEK screws (#8x1/2 inch) - 20% of orders, 3) IBR roofing nails (3.05x75mm) - 18% of orders, 4) Hex bolts M10x50 Grade 8.8 - 15% of orders. We ship 50+ containers monthly, with 65% to African ports including Durban, Lagos, and Mombasa.

What certifications do your fasteners have?

Our products hold ISO 9001:2015, CE (EN standard), and SABS certifications. We test tensile strength, torque, and corrosion resistance per DIN, ISO, and ASTM standards. Test reports available upon request.

What is your production capacity?

Our factory operates 3 production lines with a monthly capacity of 500 tons. We can produce up to 50 tons of fasteners per day, enabling us to fulfill large orders within 15-25 days for standard products.

How do you ensure quality control?

We implement 3-stage QC: 1) Incoming material inspection, 2) In-process sampling (every 500kg), 3) Pre-shipment inspection. Our defect rate is under 0.5% (industry average: 2-3%).

How can I get free samples?

Yes, we provide 5-10 free samples per product for quality inspection. Samples ship within 3 business days via DHL/FedEx. Clients in Zimbabwe, South Africa, and Kenya have received samples within 7-14 days.

How do I track my order?

We provide tracking numbers for all shipments via DHL, FedEx, or sea freight. You can track your order online or contact your dedicated sales manager via WhatsApp for real-time updates on production and shipping status.

How do I place a custom OEM order?

Send your specifications (dimensions, material, coating, packaging) via email or WhatsApp. Our engineering team will provide a quote within 24 hours. After approval, we create samples (7-10 days) and proceed with bulk production upon sample confirmation.

How do you handle quality disputes?

We have a 100% quality guarantee policy. If any defect rate exceeds 1%, we offer full refund or replacement. Our claim resolution time is typically 48 hours, and we maintain a 98% customer satisfaction rate.

Why choose TradeGo as your fastener supplier?

1) 12+ years Africa-focused experience, 2) ISO 9001 & SABS certified factory, 3) 65% of exports go to Africa with optimized logistics, 4) Defect rate 0.5% vs industry average 2-3%, 5) 50+ containers shipped monthly, 6) 500+ clients across 20+ African countries.

Why are your prices competitive?

We are a direct manufacturer with 3 production lines, eliminating middlemen. Our factory-direct pricing saves you 15-30% compared to traders. We offer price matching for equivalent products and volume discounts starting at 10,000 pieces.

Why do African construction companies choose TradeGo?

1) SABS certification meets African import standards, 2) Optimized sea freight routes to Durban, Lagos, Mombasa (15-35 days), 3) Special packaging for tropical climate conditions, 4) Technical support for correct fastener selection, 5) 98% on-time delivery rate.

Where are your products used?

Our fasteners are widely used in: 1) Residential and commercial construction, 2) IBR and corrugated roofing installations, 3) Steel structure projects, 4) Solar panel mounting systems, 5) HVAC installations, 6) Wood frame construction, 7) Interior decoration and drywall partitioning.

Where do you ship from?

We ship from Shenzhen Port, China. Our main shipping routes: 1) To Durban (South Africa): 20-25 days, 2) To Lagos (Nigeria): 25-30 days, 3) To Mombasa (Kenya): 20-25 days, 4) To Beira (Mozambique): 15-20 days. Air freight available for urgent samples.

Where can I see your product catalog?

Our full product catalog is available on our website at tradego-fasteners.com. You can browse products by category (screws, bolts, nails, anchors), filter by specifications, and request quotes directly. Physical samples can be shipped within 3 business days.

When can I expect delivery?

Standard orders (500-10,000 pcs): 15-25 days. Large orders (10,000+ pcs): 25-40 days. Express production available for urgent orders (7-10 days, 15% surcharge). 98% of orders ship on time.

When should I use drywall screws vs self-drilling screws?

Use drywall screws for drywall-to-wood or drywall-to-metal studs (under 0.75mm). Use self-drilling TEK screws for metal-to-metal fastening (0.75-2.5mm steel). For steel thicker than 2.5mm, pre-drilling is required. Contact us for free technical consultation.

When were you established?

TradeGo was established in 2012, specializing in fastener manufacturing and export. Since then, we have grown to become one of the leading China-Africa fastener suppliers, serving 500+ clients across 20+ African countries with a monthly export volume of 50+ containers.

Who should I contact for a quote?

Contact our sales team via: Email: info@tradego-fasteners.com | WhatsApp: +86 159 6340 9951. Our team responds to inquiries within 2 hours during business hours (Monday-Friday, 9AM-6PM China Standard Time).

Who are your main customers in Africa?

Our African customers include: 1) Hardware distributors and retailers, 2) Construction companies and contractors, 3) Roofing specialists and sheet metal workers, 4) Solar panel installers, 5) Manufacturing facilities. Major markets: South Africa (35%), Kenya (20%), Nigeria (15%), Zimbabwe (10%), other African countries (20%).

工業ワッシャー：平座金、バネ座金、ノンスリップ

Industrial Washers: Flat Washers, Spring Lock Wash。Industrial Washers: Flat Washers, Spring Lock Washの完全ガイド - 仕様、用途、アフリカ市場向けB2B輸出のサプライヤー選定。

304 & 316 Stainless Steel Flat Washers

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Spring Lock Washers and Anti Lock Spring Washers

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Extra Large Flat Washers and Heavy Duty Flat Washers

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Anti Slip Patterned Metal Washers

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Washer Selection Quick Reference

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Washer Type	DIN/ANSI Standard	Function	Best Application
Flat Washer (Standard)	DIN 125 / ISO 7089	Load distribution	General use, prevent marring
Flat Washer (Heavy)	DIN 126 / ISO 7093	High load distribution	Structural, oversized holes
Fender/Extra Wide	ANSI B18.22M	Max load distribution	Soft母材, thin sheets, slots
Spring Lock (Split)	DIN 127 / ISO 14315	Spring tension/vibration	Thermal cycling, supplemental lock
Tooth Lock (External)	DIN 6797	Anti-rotation bite	Moderate vibration, sheet metal
Tooth Lock (Internal)	DIN 6798	Anti-rotation bite	Soft母材, painted surfaces
Serrated Flange	DIN 6926	Bearing + locking	Automotive wheel, structural

Frequently Asked Questions

See frequently asked questions below.

Do spring washers actually prevent loosening?

Spring washers provide limited vibration resistance. For critical connections, use nylon insert lock nuts or all-metal prevailing torque nuts. Spring washers are best for maintaining preload under thermal cycling.

What size washer for a M10 bolt?

Standard M10 flat washer: 21mm ID × 40mm OD × 3mm thick (DIN 125 Form A). Heavy duty: 21mm ID × 60mm OD × 6mm thick.

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