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Help CenterFactory Direct Expansion Bolt SS304 Long Thread for Heavy Machinery ETA Approved High Hardness Full Sizes Available
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Welcome to Hefei SENOTECH New Materials Co., Ltd – your reliable partner for high-performance anchoring solutions. We are proud to introduce our Factory Direct Expansion Bolt SS304 Long Thread, specifically engineered for heavy machinery installation. These expansion bolts are manufactured from premium SS304 stainless steel with an extended thread length that ensures a secure grip even in demanding dynamic loads. With ETA (European Technical Assessment) approval and industry-leading hardness, our bolts meet the strictest safety and performance standards for industrial applications. Offered in full sizes from M6 to M30, they are the ideal choice for contractors and OEMs seeking a durable, corrosion-resistant anchoring solution directly from the factory.
As a trading company established in 2020, we have quickly built a strong presence in global markets including North America, South America, Eastern Europe, and Southeast Asia. Our annual export value reaches US$1 Million – US$1.5 Million, a testament to the trust our clients place in our product quality and service. This expansion bolt is designed to simplify installation while delivering exceptional pull-out resistance – a critical requirement for heavy machinery like presses, conveyors, and industrial generators.
Key Features & Technical Specifications
Material: Grade 304 stainless steel – excellent corrosion resistance for indoor and outdoor use.
Thread Design: Long thread length allows deeper engagement, reducing the risk of pull-out under vibration.
Hardness: ≥ 45 HRC – ensures the bolt can withstand high clamping forces without deformation.
ETA Approved: Complies with European Technical Assessment for structural anchoring, providing documented safety margins.
Full Sizes Available: Diameters from M6 to M30, with lengths from 50mm to 300mm or custom.
Surface Finish: Natural bright or passivated finish for enhanced corrosion protection (optional).
Installation: Designed for fast and reliable expansion in concrete, brick, or stone substrates.
| Size | Thread Length (mm) | Min. Embedment Depth (mm) | Recommended Torque (Nm) |
|---|---|---|---|
| M10 | 60 | 50 | 30 – 40 |
| M12 | 75 | 65 | 50 – 60 |
| M16 | 90 | 75 | 80 – 100 |
| M20 | 110 | 90 | 120 – 150 |
Why Choose Our Expansion Bolt?
Superior Grip: The long thread design distributes load evenly, making it ideal for heavy machinery that generates constant vibration.
Corrosion Resistance: SS304 material resists rust even in humid or chemical environments, reducing maintenance costs.
Time-Saving Installation: Easy to install with standard tools – simply drill, insert, and tighten.
Global Compliance: ETA approval gives peace of mind for projects requiring European standard documentation.
Flexible Ordering: We offer full sizes and can customize length/diameter per your drawings (MOQ applies).
Trust HEFEI SENOTECH – Your Partner in Industrial Anchoring
Since our founding, we have served clients across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and more. With an annual export value of US$1 Million – US$1.5 Million, we maintain strict quality control and efficient logistics. Our team is committed to providing you with the right expansion bolt for your heavy machinery application – delivered on time and at competitive factory-direct prices. Whether you need a small trial order or bulk container shipments, we are ready to support your project. Contact us today for a quotation or technical discussion!
Frequently Asked Questions
Q: What is the difference between a long-thread expansion bolt and a standard one?
A: Long-thread bolts have a longer threaded portion, allowing more adjustability and deeper engagement in the concrete. This reduces the risk of bolt pull-out under heavy loads, making them preferred for heavy machinery anchoring.Q: Is the ETA approval valid for all sizes?
A: Yes, our entire range of SS304 expansion bolts with long thread design is ETA approved. The approval covers diameters from M6 to M30 and corresponding lengths. We can provide the ETA certificate upon request.Q: Can I use these bolts for outdoor applications?
A: Absolutely. SS304 offers excellent corrosion resistance against rain, humidity, and many chemicals. However, for marine environments (high chloride), we recommend SS316 – we can supply that as an alternative.Q: What drilling depth and hole diameter are required for each size?
A: For M10, drill a 10mm diameter hole to a depth of at least 50mm. Refer to our installation guide or contact us for exact values for each size. We provide a detailed installation manual with every order.Q: What is the minimum order quantity (MOQ)?
A: The standard MOQ is 1000 pieces per size, but we do offer smaller quantities for sample or trial orders. Please discuss your specific needs with our sales team.Q: How should I store these bolts before installation?
A: Keep them in a dry environment, preferably on pallets or in plastic bags. Although SS304 resists corrosion, avoid prolonged contact with moisture to preserve the bright finish.Q: Do you provide custom packaging with our logo?
A: Yes, we offer custom packaging including branded boxes, polybags, or blister packs. MOQ for custom packaging may be higher – please inquire for details.Q: What payment terms do you accept?
A: We accept T/T, L/C, and others negotiable. For first orders, we typically require 30% deposit and 70% balance before shipment.
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