Global Specialist in Fin Bolt / Silo Bolt for Storage Tanks
High‑strength bolts, nuts and washers for bolted steel silos and storage tanks.
Products Description
The Heavy Hex Nut is a precision-engineered component specifically selected for use in storage tank and silo bolt assemblies. Manufactured
to exacting dimensional tolerances, it delivers consistent clamping force and long-term fastener stability in demanding industrial
environments.
Supplied as part of our complete Fin Neck Bolt Kit, or available separately for replacement and bulk procurement.
✓ High-strength grade — exceeds standard hex nut load requirements
✓ Precisely matched to our Fin Neck Bolt system for guaranteed compatibility
✓ Available in corrosion-resistant surface treatments for outdoor tank use
✓ Dimensional consistency — every nut meets strict QC before shipment
✓ Compatible with 1/2" UNC and M12 / M16 fin neck bolt systems
✓ Batch quality inspection reports provided with every order
| Specification | Detail |
| Compatible with | 1/2" UNC / M12 / M16 Fin Neck Bolt systems |
| Strength grade | High-strength (details available on request) |
| Surface treatment | HDG / Dacromet / Encapsulated (specify on order) |
| Quality standard | International standard compliant |
| Traceability | Batch inspection report included |
| Sold as | Individual pieces or as part of complete kit |
【Applicable Tank Types】
✓ FRP water storage tanks
✓ Steel bolted storage tanks
✓ Grain silos and dry bulk storage
✓ Petrochemical and chemical storage tanks
✓ Industrial liquid storage and processing tanks
【Why Nut Selection Matters in Tank Assembly】
✓ Incorrect nut grade causes joint relaxation and eventual leakage
✓ Mismatched coating accelerates galvanic corrosion at the joint
✓ Our nuts are pre-matched to our bolt system — eliminating compatibility risk
✓ Every batch supplied with traceability documentation
Interested in specifications, pricing or samples?
Technical details including material grade, dimensional drawings and
test reports are available to qualified tank manufacturers and
installers upon request.
Response within 24 hours.
To enquire, please provide:
- Required bolt size (1/2" UNC / M12 / M16)
- Estimated annual volume
- Preferred surface treatment
→ [Contact Us for Technical Details and Pricing]
Related Products:
- 1/2" UNC Fin Neck Bolt Kit — complete 5-piece assembly kit
- M12 / M16 Fin Neck Bolt Kit — metric complete assembly kit
- Rubber Sealing Washer — EPDM sealing washer for bolt holes
- Plastic Cap — PA66 protective cap for nut and bolt end
- Steel Washer — load distribution washer
Related Pages:
- Quality & Testing — in-house laboratory and QC standards
- Quality Certificate — ISO 9001:2015 and international certifications
- Contact Us — technical enquiries welcome
OUR ADVANTAGE
Industry Authority
FAST® Zhonglian is the first manufacturer in China to obtain dual EN 14399 & EN 15048 (SB Bolts) certifications .
Our silo bolts meet ASTM Grade 8 (150,000 PSI) and ISO 10.9 high-tensile standards .
NSF/ANSI 61 & 372 Certified (Lead-Free)
ISO 9001:2015 Quality Management
Green Supply Chain
Committed to ESG goals, we provide verified ISO 14067 Product Carbon Footprint statements.
Our screws feature a verified GHG emission of 7027.78 kg CO2e per tonne .
Traceable manufacturing via Intelligent Cloud Management System .
Global Presence
Supporting mega-infrastructure from Dubai Tower to the Riyadh Cables Group.
Local support available via our global hubs:
📍Middle East:Dubai Branch
📍Asia:Malaysia & Indonesia
Brand Identity: FAST® | 01PB (US Registered)