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Hot-Dip Galvanized Bolts and Nuts: Overview and Considerations
1. Galvanization Process:
Definition: Hot-dip galvanizing involves immersing steel or iron bolts and nuts in molten zinc (≈450°C/842°F) to form a protective zinc coating.
Protection Mechanism: The zinc layer acts as a barrier and provides sacrificial protection, corroding before the underlying steel.
2. Advantages:
Durability: Thicker coating compared to electroplating, ideal for harsh environments (outdoor, marine, industrial).
Longevity: Resists abrasion, impact, and weather, reducing maintenance needs.
Self-Healing: Minor scratches are protected as surrounding zinc corrodes preferentially.
3. Design Considerations:
Thread Compatibility: Coating thickness may affect threading. Nuts are often tapped post-galvanizing to ensure fit.
Appearance: Matte gray finish, suitable for industrial rather than aesthetic applications.
4. Standards and Specifications:
ASTM A153: Governs zinc coating thickness and quality for hardware.
ISO 1461: International standards for hot-dip galvanized coatings.
5. Applications:
Common Uses: Bridges, construction, marine structures, and outdoor installations.
Material Compatibility: Avoid pairing with dissimilar metals (e.g., stainless steel) to prevent galvanic corrosion.
6. Environmental and Safety Aspects:
Recycling: Galvanized steel is recyclable, though zinc must be managed during processing.
Process Safety: Facilities must handle molten zinc emissions and waste responsibly.
7. Cost and Maintenance:
Cost: Higher initial cost due to processing, offset by extended lifespan.
Installation Care: Avoid damaging the coating during handling to maintain corrosion resistance.
Conclusion: Hot-dip galvanized bolts and nuts offer robust corrosion protection for demanding environments, adhering to industry standards. Proper installation and material pairing ensure optimal performance and longevity.
Specification
More Detail Informations
Available Material
1.Stainless Steel: SS303, SS304, SS316, SS410, SS420; 2.Carbon steel: C1006,C1010,C1018,C1022,C1035K,C1045; 3.Brass: C3602,C3604,Hpb59,Hpb62,Hpb65,Hpb58,Hpb70 ; 4.Aluminum: Al6061, Al6063 etc or as your requirements
The sample is free of charge if we have the existing tooling,you only need to pay for the freight cost
Delivery time
Samples time 3-5 working days, Lead time 20-25 working days
Pricing Term
EXW Dongguan(FCA),FOB, CIF, CNF, DDU,etc.
Packing
Bulk in PE bag or Small boxes.then in carton .pallet
Payment term
TT (30% in advance as deposit, balance before delivery) , L/C, Western Union,PayPal etc
Management system
ISO9001:2015
Certificate
ISO,ROHS
Why Choose Us
Why Choose Us?
✅ OEM/ODM Support: Full custom packaging, branding, and documentation. ✅ Quality Assurance: ISO 9001-certified with full material traceability and testing (salt-spray, torque, tensile). ✅ Flexible MOQs: Prototype batches to large-scale production. ✅ Fast Turnaround: 10–15 days for standard orders; expedited options available.
Company Profile
FAQ
Q1: What is your main products and material supply? A1: Our main products are Electronic screws,Sems screws,Tapping screws,Chicago screws,Shoulder screws etc. Special Non-standard studs,Turning parts and High-end precision complex CNC Machining parts etc. A2: Carbon Steel, Alloy Steel, Aluminum alloy,Stainless Steel, Brass, Copper ,Titanium alloy or according to your requirement.
Q2: When can I get the price? A: We usually offer you a quotation within 12 hours, and the special offer is not more than 24 hours.Any urgent cases, please contact us directly by phone or send email to us.
Q3: What about the transportation and delivery date? A: If the weight of goods more than 80kg,Normally we use shipment to transprot the orders. It is about 20-30days . If the weight of goods less than 80kg,or there are urgent, we can send the goods via air express,It is 3~5 days.
Q4: What's your packing?What to do in case of damaged goods during transport? A1: Our Normal packing is bulking in Cartons, less than 20 kgs/carton, 48 cartons / pallet. We also can pack products according to your requirement. A2: To avoid any subsequent trouble regarding quality issue, we suggest you check the goods once you receive them. If there is any transport damaged or quality issue, don't forget take the detail pictures and contact us as soon as possible, we will properly handle it to make sure your loss to reduce to the smallest.
Q5: Can I get discounts? A: Yes, for big order, frequent customers, we give reasonable discounts.
Q6: Do you have enough capacity? A: Our production equipment is a new imported equipment. We have a group of skilled workers who have been working for more than 10 years. Their production experience is very rich and their skills are very skilled. The screws can be 30 million pcs/month. We have sufficient funds to ensure the normal operation of the factory.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2002
Total Annual:
5000000-6000000
Employee Number:
101~200
Ecer Certification：
Verified Supplier
FinEx Precision fastener company is a manufacturer specializing in the production and sales of screws, nuts, rivets, springs, customize hardware and other industrial fasteners.More than 20 years of experience in the field of fasteners with a 6,000 square meters factory, a 70 people team and has obta... FinEx Precision fastener company is a manufacturer specializing in the production and sales of screws, nuts, rivets, springs, customize hardware and other industrial fasteners.More than 20 years of experience in the field of fasteners with a 6,000 square meters factory, a 70 people team and has obta...
