Expansion bolts are commonly used in construction and engineering for securing heavy objects to walls or other solid structures. The price and packaging of expansion bolts can vary based on several factors, including the material, size, brand, and quantity.

Price Factors

Materials

1. Steel
   • Standard Steel: Common for general applications.
   • High-Strength Steel: Used in heavy-duty applications for higher load-bearing capacity.
2. Stainless Steel
   • 304 Stainless Steel: Offers good corrosion resistance, suitable for most environments.
   • 316 Stainless Steel: Higher corrosion resistance, ideal for marine or industrial environments.
3. Galvanized Steel
   • Hot-Dip Galvanized: Provides a thicker coating for better corrosion resistance.
   • Electro-Galvanized: Thinner coating, more cost-effective but less durable in corrosive environments.

Sizes and Types

1. Diameter: Common diameters range from 6mm to 20mm (1/4″ to 3/4″).
2. Length: Can vary widely from 30mm to 300mm (1″ to 12″) depending on application requirements.
3. Thread Types:
   • Coarse Threads: Easier to install, more common for general use.
   • Fine Threads: More precise, used in specific engineering applications.

Special Features

1. Tamper-Proof Heads: Security feature to prevent unauthorized removal.
2. Coatings: Additional protective layers, such as PTFE coatings, to enhance durability in harsh environments.
3. Expansion Mechanism: Some bolts have unique mechanisms to ensure better grip in softer materials.

Packaging Details

1. Individual Packaging
   • Retail Packs: Often found in hardware stores, each pack may contain a single bolt or a small set.
   • Clamshell Packaging: Clear plastic packs for easy visibility and protection.
2. Bulk Packaging
   • Boxes: Large cardboard boxes with bulk quantities, typically ranging from 50 to 500 bolts per box.
   • Plastic Bags: Smaller quantities packed in durable plastic bags, usually with labels indicating size and quantity.
3. Kits
   • Assorted Kits: Mixed sizes in a single pack, useful for varied needs.
   • Project Kits: Tailored for specific projects, including a combination of bolts, washers, and nuts.
4. Customized Packaging
   • Branding: Custom printed boxes or bags with the supplier’s logo.
   • Special Counts: Tailored to customer requirements, ensuring the exact number needed.
   • Protective Packaging: Additional padding or separators to protect the bolts during shipping.

Example Price Ranges

1. Steel Expansion Bolts
   • 6mm x 50mm: $0.10 – $0.20 per bolt
   • 10mm x 100mm: $0.50 – $0.70 per bolt
   • 20mm x 200mm: $1.00 – $1.50 per bolt
2. Stainless Steel Expansion Bolts
   • 6mm x 50mm: $0.50 – $0.70 per bolt
   • 10mm x 100mm: $1.00 – $1.50 per bolt
   • 20mm x 200mm: $1.50 – $2.00 per bolt
3. Galvanized Steel Expansion Bolts
   • 6mm x 50mm: $0.20 – $0.30 per bolt
   • 10mm x 100mm: $0.70 – $1.00 per bolt
   • 20mm x 200mm: $1.00 – $1.50 per bolt

Purchase Considerations

1. Application Requirements: Assess load-bearing needs and environmental conditions.
2. Supplier Reliability: Choose suppliers with a proven track record for quality and timely delivery.
3. Quality Standards: Ensure bolts meet relevant standards like ANSI, ISO, or DIN.
4. Cost vs. Benefit: Higher initial costs for quality materials can result in long-term savings due to durability and reduced maintenance.

For specific supplier information, quotes, and availability, contacting manufacturers directly or through industrial supply distributors like lalametal can provide the most accurate and up-to-date details.