03/08/2026
High Tensile Bolts Explained: Grade 8.8 vs. 10.9 vs. 12.9 ๐
Not all bolts are built the same! When your project requires serious strength, High Tensile Bolts are engineered to handle high loads, extreme pressure, and heavy vibrations without bending or snapping.
The numbers stamped on top of the bolt head (8.8, 10.9, or 12.9) tell you exactly how much load and tension the bolt can endure before failing.
1. Grade 8.8 โ The Standard High-Strength Workhorse
Strength Level: High Strength
Best For: Everyday industrial, automotive, and structural applications.
Why Choose Grade 8.8? It offers an excellent balance of strength and flexibility. It is tough, resists fatigue, and is the go-to fastener for general machinery, steel fabrication, and structural frames.
2. Grade 10.9 โ The Heavy-Duty Structural Choice
Strength Level: Ultra-High Strength (~25% stronger than 8.๐
Best For: Heavy automotive, high-load steel structures, and heavy equipment.
Why Choose Grade 10.9? Built from specialized alloy steel, Grade 10.9 is designed to support immense weight and resist severe mechanical wear. Ideal for vehicle suspension systems, engine mounts, and critical structural joints.
3. Grade 12.9 โ The Ultimate Maximum-Strength Fastener
Strength Level: Extreme Tensile & Shear Strength (~20% stronger than 10.9)
Best For: Extreme industrial environments, heavy manufacturing, and high-vibration machinery.
Why Choose Grade 12.9? This is the highest standard strength grade available for steel fasteners. It provides maximum clamping force and ultimate resistance against heavy pressure, making it essential for critical safety operations and heavy-duty industrial plant gear.
For orders and inquiries call/message us at:
โ0917-133-1875
โ0917-793-5678
โ(045)963-1875
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Unistrong Industrial Corporation
Unistrong Industrial Corp
Located @
๐Lanwin Bldg. Mc Arthur Highway Brgy. Del Pilar, City of San Fernando, Pampanga
Walk in or Online Transaction is accepted.
We are open from monday to saturday from 8:00am to 5:00pm
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