M12 × 55 mm Hex Bolt – High Strength for Heavy-Duty Applications
Ensure strong, secure, and reliable fastening with our M12 × 55 mm hex bolt, engineered for demanding industrial, structural, and mechanical applications. Manufactured to international standards (DIN 933 / DIN 931), this bolt offers a perfect combination of tensile strength, precision threading, and durable material performance.
Whether you're working with machinery, steel frameworks, or high-load joints, the M12 × 55 mm bolt provides consistent torque performance and long-term reliability.
✅ Key Features:
Thread Size: M12 × 1.75 mm (coarse pitch)
Length: 55 mm
Head Type: Hex head, 19 mm across flats
Material Options:
High-tensile carbon steel (Grade 8.8 / 10.9)
Stainless steel (A2 / A4) for corrosion resistance
Standards: DIN 933 (full thread) / DIN 931 (partial thread), ISO 4017
Finish Options: Zinc-plated, plain, hot-dip galvanized, stainless
Item Attributes
| Length | 55 mm (±0.6 mm) |
| Nominal diameter | M12 (12 mm) |
| Width | Across Flats (AF) 19 mm |
| Diameter Range | Head Height (k) ~7.7 – 7.8 mm |
| Thread Size | 1.75 mm |
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