Recent market intelligence suggests the global demand for butterfly bolts and related fasteners is projected to reach $650 million USD by 2028, with a CAGR of 6.2% between 2023-2028 (source: MarketsandMarkets, Fasteners Report 2023).
Key drivers include industrial automation, lightweight construction, corrosion resistance requirements, and stricter international standards (ISO 898, ASTM A307).
The widespread adoption of butterfly bolts in petrochemical, water engineering, marine, HVAC, and energy sectors underlines their importance in modern infrastructure.
Typical Specifications Table: Butterfly Bolts & Related Fasteners
Parameter |
Butterfly Bolts (Standard) |
Butterfly Anchor Screws |
Stainless Steel Butterfly Bolts |
Thread Size (mm) |
M4–M12 |
M6–M16 |
M3–M20 |
Length (mm) |
20–120 |
30–150 |
12–200 |
Material |
Carbon Steel, Zinc-plated |
Carbon Steel, Galvanized |
304/316 Stainless Steel |
Corrosion Resistance |
Moderate (Salt Spray 48h) |
Good (Salt Spray 96h) |
Excellent (Salt Spray 500h+) |
Rated Load (kN) |
2–6 |
4–10 |
3–12 |
Certifications |
ISO 898-2, RoHS |
ISO 898-1, EN 14592 |
ISO 3506, ASTM F593 |
Typical Application |
Lightweight Fixings |
Concrete/Plasterboard |
Outdoor/Marine Use |
The Best expansion butterfly wing anchor represents the pinnacle of butterfly bolts engineering. Combining precision manufacturing and superior material selection—typically 304/316 stainless steel or carbon steel with Dacromet/Zinc plating—it meets or exceeds ISO 3506, ANSI/ASME B18.5, and DIN 315 standards.
Raw Material Selection
• 304/316 SS / High-grade Carbon Steel
• Quality assured via mill certificates per ISO
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Forging or CNC Machining
• Wing shaping & thread rolling
• Up to 5-micron tolerance
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Surface Treatment / Coating
• Zinc / Dacromet plating for corrosion resistance
• Salt Spray ≥ 500h (per ISO 9227)
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Heat Treatment / Hardening
• Ensures tensile & shear strengths meet ISO 898
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Assembly & Finishing
• Final torque testing & packaging
• Conforms to ANSI B18.5
Final in-house inspections utilize 3D measurement and fatigue cycle testing prior to customer dispatch, ensuring batch consistency for demanding industrial projects.
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Superior Holding Power: The expansion mechanism of butterfly anchor screws excels in thin-wall and hollow materials (e.g., drywall, concrete panels) versus basic expansion anchors.
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Enhanced Corrosion Resistance: Stainless steel butterfly bolts (per ISO 3506, ASTM A193 B8) offer >500 hrs salt-spray resistance, outperforming standard zinc-plated options.
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Quick & Secure Installation: Unique wing design ensures stress is distributed evenly, reducing substrate cracking risk.
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Certified Reliability: Every batch comes with certificates of compliance (ISO, ANSI reports), plus UL or CE where applicable.
Performance Comparison – Best Expansion Butterfly Wing Anchor vs. Typical Competitors
Key Insights: The Best expansion butterfly wing anchor demonstrates up to 35% higher tensile strength and double the corrosion resistance compared to typical competitors, according to batch testing (ISO 898, ASTM B117).
Clients requiring non-standard specifications can request tailor-made butterfly bolts: custom thread pitch, extended wings, specialist coatings (PTFE, Xylan), high-strength or ultra-low-temperature variants (tested to -60°C). All bespoke solutions are engineered via CAD/CAE before production, with FAI reporting and test samples sent for validation.
- Production Lead Time: Standard sizes: ~7 workdays; Custom: 2–4 weeks (including QC and certification)
- Testing: Routine: Salt spray (ISO 9227); Advanced: SEM imaging, Break-load testing (EN 13411), Thread gauging (ASME B1.1)
- After-Sales: 5-year warranty, on-site technical support, and full traceability via batch numbers
Material Composition – Best Expansion Butterfly Wing Anchor
Stainless steel makes up the bulk of material used, guaranteeing top tier salt-, acid-, and weather-resistance for long service life.
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Petrochemical Plants: Used for secure pipeline holder mounting in areas subject to vibration and corrosive atmospheres, replacing traditional sleeve anchors in Shell’s Xinjiang site (2022), resulting in 60% maintenance reduction over 18 months.
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Municipal Water Supply: Fast installation into wet concrete tanks, outperforming wedge anchors by minimizing seepage (case: Changsha Water Co., 2023, 8000+ pieces).
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Offshore Wind Farms: Stainless steel butterfly bolts withstand >12,000 fatigue cycles and resist pitting, used by German operator TIDALPOWER since 2021.
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HVAC Engineering: Rapidly secure duct hangers to both drywall and RC slabs, meeting UL94 and EN 14566 fire requirements.
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Rail & Metro Tunnels: Customized variants with enhanced wings enable safe cable tray fixation, surviving 120-hour salt fog (as per China Rail standards).
Customer feedback (Siemens, 2023): “After switching to high-strength butterfly bolts, average installation time per point was reduced by 42%, and post-installation inspections showed zero anchor failures in 10,000 units tested.”
Load Capacity Trend – Butterfly Bolts by Material
Modern butterfly bolts made from advanced alloys (e.g. 316 SS) show a 48% higher load rating than legacy carbon steel variants, supporting safety-critical installations.
Q1: What is the typical material composition of high-end butterfly bolts?
304/316 stainless steel (for marine & chemical exposure), or carbon steel with zinc/Dacromet coatings. All validated per ISO 3506 and ASTM F593.
Q2: Which industry standards do these fasteners comply with?
ISO 898-2, DIN 315, ANSI B18.5, EN 14566 for mechanical strength; RoHS/Reach for environment; UL/CE for some OEM applications.
Q3: What sizes and thread forms are available?
Metric (M3–M16) and Imperial (1/8"-3/4"); custom pitch and wing length available upon specification.
Q4: Are butterfly bolts suitable for dynamic/vibrating loads?
Yes. The expansion wings prevent loosening, making them ideal for vibration-intensive scenarios (e.g., pumps, machinery mounts).
Q5: What installation torque is recommended?
Typically 4–10 Nm for standard variants and up to 18 Nm for stainless steel butterfly bolts; always consult technical datasheets for exact values.
Q6: How is the long-term corrosion resistance verified?
Via salt spray testing per ISO 9227; for instance, our stainless steel butterfly anchor screws pass 500+ hours without red rust.
Q7: Is OEM/branding or special packaging supported?
Yes. Laser engraving, color code, and industrial/commercial packaging on request; full documentation and traceability provided.
- Standard Lead Time: 7–10 workdays for stock sizes; custom bulk—2–4 weeks inclusive of quality testing and paperwork.
- Warranty: 5 years global warranty (certificate on dispatch), with rapid RMA/replacement logistics should any nonconformity occur.
- Customer Service: Multi-lingual specialist teams offer 24/7 online support (via email & WhatsApp), site install guidance videos, and field failure diagnostics.
- Certifications Supplied: All deliveries include ISO, EN, and RoHS/Reach reports, with additional 3rd party test witnessing as required.
For critical engineering projects, detailed batch test data and traceability records are always available for peace of mind.
For further technical documentation and applications, visit HBXZ Fastener or refer to recent industrial conference proceedings for comparative test data.