Engineered for cost-efficient, reliable fastening — precision u nuts and screws, plus wing nut with lock washer combos, built to ASME B18.2.2, DIN 6926, and ISO 898-1 standards. Cut procurement costs by up to 32% vs. traditional distributors.
Share:
Engineered for cost-efficient, reliable fastening — precision u nuts and screws, plus wing nut with lock washer combos, built to ASME B18.2.2, DIN 6926, and ISO 898-1 standards. Cut procurement costs by up to 32% vs. traditional distributors.
⚡ Free samples for first-time OEM/ODM orders
📋 Article Contents
In 2026, global fastener demand is projected at $96.4 billion (DataIntelo, 2025). Yet many buyers still face these five recurring issues:
🔴 Inconsistent dimensions — u nuts that don't fit rail channels, causing field rework at $47–$89 per hour.
🔴 Wing nut with lock washer loosening under vibration — safety risk and warranty claims.
🔴 High shipping costs from fragmented sourcing — buying u nuts, screws, and wing nuts from different suppliers multiplies freight.
🔴 Surface corrosion in outdoor DIY projects — 63% of returns in the hardware washer segment are corrosion-related (DataInsightsMarket, 2025).
🔴 Long lead times from distributors — 28–45 days average, while your production line waits.
📸 Handan Guanbiao — 30,000㎡ smart factory
Our factory combines 26 years of fastener expertise with 120+ precision machines to deliver components that meet ASME, DIN, and ISO standards — at direct factory pricing.
Precision-formed u nuts and screws in carbon steel, 304/316 stainless, and zinc-plated alloys. Compatible with 1-5/8″ and 41mm strut channels. Spring-tension retention eliminates slip.
Thread sizes: M6, M8, M10, M12, 1/4″–1/2″
Salt spray test: 72–200h (ASTM B117)
Ideal for solar racking, cable trays, HVAC
Our wing nut with lock washer combines a serrated flange lock washer pre-assembled on a wing nut. No separate washer handling — reduces assembly time by 26% (internal time-study, 2025).
Materials: stainless steel 304, 316, brass, nylon
Locking torque: 4.5–18 N·m depending on size
Perfect for DIY furniture, outdoor gates, machinery guards
Combine u nuts and screws + wing nut with lock washer + other fasteners in one shipment. Our 3,000+ product SKUs let you consolidate and save up to 32% on freight.
Custom head markings, packaging, kitting
Lead time: 12–18 days for standard orders
MOQ: as low as 500 pcs for trial orders
| Parameter | U Nuts & Screws | Wing Nut with Lock Washer |
|---|---|---|
| Standards | ASME B18.2.2, DIN 6926, ISO 898-1 | DIN 6926, ISO 7043, ASME B18.6.4 |
| Thread Sizes | M6, M8, M10, M12, 1/4″–1/2″ | M5, M6, M8, M10, 5/16″–3/8″ |
| Material Options | Carbon steel (8.8/10.9), 304SS, 316SS | 304SS, 316SS, brass, nylon, zinc alloy |
| Surface Treatment | Zinc-plated, HDG, Dacromet, passivated | Zinc-plated, passivated, bright nickel |
| Corrosion Resistance (Salt Spray) | 72–200 h (ASTM B117) | 96–240 h (ASTM B117) |
| Operating Temp. Range | -40°C to 300°C | -30°C to 250°C |
*Custom grades and non-standard dimensions available on request. Contact our engineering team for design assistance.
U nuts for seismic bracing, cable tray, and pipe support systems.
Wing nut with lock washer for panel mounting — anti-loosening under wind load.
Quick-assembly wing nuts for shelving, gates, and garden structures.
+ 150 Fortune Global 500 suppliers
CE · FCC · RoHS · VDE · SAA
“We switched to Handan Guanbiao for u nuts and screws and reduced our fastener spend by 28%. The wing nut with lock washer combo eliminated a separate washer SKU — saved us 12% on logistics. Consistent quality every batch.”
“The wing nut with lock washer is perfect for our outdoor furniture kits. No more customer complaints about loose hardware. Lead times are 18 days — half of our previous supplier. Highly recommend.”
“We tested 316 stainless u nuts and screws from Guanbiao in our marine cable tray systems. After 500h salt spray — zero red rust. Their engineering team helped us customize the thread length. Real partnership.”
We offer carbon steel (grades 8.8, 10.9), 304 stainless steel, 316 stainless steel, and zinc-plated alloys. For the wing nut with lock washer, we also offer brass and nylon options. All materials meet RoHS and REACH compliance.
Absolutely. Our wing nut with lock washer in 304SS or 316SS is ideal for outdoor and marine environments. The serrated lock washer provides vibration resistance even under wind load, making it a top choice for solar panel mounting and gate hardware.
For standard sizes, MOQ is 500 pcs per SKU. For custom dimensions or special finishes, MOQ starts at 2,000 pcs. We also offer sample orders (50–100 pcs) for qualification at a small fee — refundable on first bulk order.
Our factory is ISO 9001:2015 certified. Every batch undergoes dimensional inspection (CMM), hardness testing (Rockwell), and salt spray corrosion testing. We provide full inspection reports with each shipment — including material traceability certificates.
Standard production lead time is 12–18 days for u nuts and screws and wing nut with lock washer. Express production (7–10 days) available at 8% surcharge. We ship via sea, air, or express (DHL/FedEx). For consolidated orders above 500 kg, we offer free freight to major ports in the US and Europe.
Yes. We provide OEM/ODM packaging — blister packs, poly bags with hang holes, barcode labels, and retail-ready boxes. We can also create kits combining u nuts, screws, and wing nut with lock washer for DIY furniture or solar mounting. Tell us your SKU count and we’ll design the pack.
Simply email info@topfastener.com or Jack@topfastener.com, or call/WhatsApp +86 15531020881. Provide your required sizes, quantities, and target price. We’ll respond with a detailed quotation within 4 hours (during business hours). Free samples available for first-time OEM/ODM customers.
“I used the wing nut with lock washer for my greenhouse frame. Assembly was fast — no extra washer to fumble with. After a winter of storms, nothing loosened. Great quality for the price.”
“We switched our entire strut channel fastening to Guanbiao’s u nuts and screws. The spring retention is consistent — no more slipping during installation. 24% faster assembly on our cable tray lines.”
“The wing nut with lock washer in 316SS is perfect for our solar racking. No galling, no loosening after torque. And the factory direct pricing saved us 31% compared to our previous distributor. Ordering again.”
“We used 10,000 pcs of u nuts and screws for a major airport project. Every piece passed our dimensional inspection. The zinc plating is uniform — zero white rust. Reliable partner for critical infrastructure.”
Direct client feedback — fast response, technical support, and on-time delivery.
🔍 About the Author
David L. Chen — Senior Fastener Engineer & Supply Chain Strategist
With over 18 years of experience in the industrial fastener industry, David has worked with more than 200 manufacturing and construction clients across North America, Europe, and Southeast Asia. He leads the technical team at Handan Guanbiao Metal Products Manufacturing Co., Ltd., where he oversees product design, quality compliance, and global sourcing optimization. David is a regular contributor to industry publications on fastener standards and supply chain resilience.
Get factory-direct pricing on u nuts and screws and wing nut with lock washer. Free samples · 12–18 day lead time · Full material traceability
🔒 Your information is protected under our privacy policy. No spam — ever.
Hit enter to search or ESC to close
