LOCK BOLT & NUT
LOCK BOLT
📌 Overview
The Steel Lock Bolt is a high-strength permanent fastening system designed to deliver exceptional vibration resistance, clamp load, and structural integrity. Unlike conventional nuts and bolts, lock bolts consist of a pin and collar system that, once installed, forms a tamper-resistant, maintenance-free joint.
During installation, the collar is swaged (cold-formed) into the pin grooves using a special installation tool, creating a uniform, high-clamp, and vibration-proof connection. Steel lock bolts are widely used in structural steelwork, heavy machinery, railways, automotive, and construction applications where safety and reliability are critical.
✅ Key Highlights
📏 Type: Lock Bolt / Structural Fastener
🔘 Design: Grooved pin with swage collar for permanent fastening
⚙ Material: Carbon Steel / Alloy Steel (Heat Treated)
💪 Strength Class: High tensile & shear strength (structural grade)
🌊 Corrosion Protection: Plain, Zinc Plated, HDG, or other coatings
🛠 Installation: Installed using hydraulic or pneumatic lock bolt tools
📦 Size Range: M5 – M30 (or equivalent imperial sizes)
📊 Technical Specifications
| Specification | Details |
|---|---|
| Product Type | Steel Lock Bolt |
| Components | Grooved Pin + Swage Collar |
| Material | Carbon Steel / Alloy Steel |
| Heat Treatment | Quenched & Tempered |
| Head Styles | Round Head / Countersunk Head |
| Collar Type | Standard / Flanged |
| Surface Finish | Plain, Zinc Plated, Hot Dip Galvanized |
| Installation Method | Hydraulic / Pneumatic Lock Bolt Tool |
| Joint Type | Permanent, vibration-resistant |
📍 Applications
✔ Structural steel & bridge construction
✔ Railway coaches & track systems
✔ Automotive chassis & heavy vehicles
✔ Earthmoving & mining equipment
✔ Wind towers & transmission structures
✔ Industrial machinery & heavy fabrication
✔ Defence & infrastructure projects
🏆 Why Choose Steel Lock Bolts?
✨ Extremely High Clamp Force – uniform and consistent joint strength
✨ Vibration-Proof & Tamper-Resistant – no loosening over time
✨ Permanent Fastening Solution – ideal replacement for nuts & bolts
✨ High Shear & Tensile Strength – suitable for structural loads
✨ Fast Installation – reduces assembly time in production lines
✨ Low Maintenance – no retightening required
COLLAR NUT FOR LOCK BOLT
📌 Overview
The Steel Lock Bolt is a high-strength permanent fastening system designed to deliver exceptional vibration resistance, clamp force, and structural integrity. Unlike conventional bolts and nuts, lock bolts form a tamper-proof, maintenance-free joint once installed.
A lock bolt system typically consists of a pin (bolt) and a collar, which is swaged permanently during installation using a specialized tool. This creates a uniform, preload-controlled joint that will not loosen under shock, vibration, or dynamic loads.
Manufactured from carbon steel or alloy steel, lock bolts are widely used in structural steelwork, railways, automotive, heavy machinery, bridges, and industrial assemblies.
✅ Key Highlights
📏 Type: Lock Bolt / Structural Fastener
🔘 Design: Grooved pin with swage-type collar
⚙ Material: Carbon Steel / Alloy Steel
💪 Strength Class: High tensile & shear strength (comparable to Grade 8 / 10.9 bolts)
🛡 Joint Type: Permanent, vibration-proof fastening
🛠 Installation: Installed using hydraulic or pneumatic lock bolt tools
📦 Size Range: M5 – M24 (Metric) / 3/16" – 1" (Inch)
📊 Technical Specifications
| Specification | Details |
|---|---|
| Product Type | Steel Lock Bolt |
| Material | Carbon Steel / Alloy Steel |
| Head Styles | Round Head, Button Head, CSK (varies by design) |
| Pin Design | Grooved shank for collar swaging |
| Collar Type | Swage collar (installed permanently) |
| Surface Finish | Plain, Zinc Plated, Mechanical Galvanized, Hot Dip Galvanized |
| Installation Method | Hydraulic / Pneumatic Lock Bolt Tool |
| Joint Characteristic | High clamp load, vibration resistant |
| Reusability | Non-reusable (permanent joint) |
📍 Applications
✔ Structural steel fabrication & construction
✔ Railways & metro coaches
✔ Automotive chassis & body structures
✔ Heavy machinery & equipment frames
✔ Bridges, towers & infrastructure projects
✔ Mining, earth-moving & agricultural equipment
✔ Defence & aerospace structural assemblies
🏆 Why Choose Our Steel Lock Bolts?
✨ Permanent Vibration-Proof Joint – Will not loosen under shock or cyclic loads
✨ High Clamp Force – Consistent preload across assemblies
✨ Faster Installation – Single-side installation compared to nut-bolt systems
✨ Maintenance-Free – No retightening required
✨ Tamper Resistant – Ideal for safety-critical applications
✨ Available in Multiple Finishes – Suitable for indoor & outdoor use
