Manufacturer of Screws, Bolts & Highway–Expressway Accessories | Samut Sakhon, Thailand
Wholesale & Custom-Made Bolts & Screws (HDG) for Highway & Expressway Projects
PB-Trading is a manufacturer of screws, bolts, washers, and installation accessories for guardrail and grounding systems used in highway, expressway, tollway, bridge, and large-scale public infrastructure projects. We operate under industrial standards certified by the Department of Highways (DOH) and the Expressway Authority of Thailand (EXAT) — covering every process from design, production, and Hot-Dip Galvanized (HDG) coating for superior rust protection to Made-to-Spec manufacturing and on-site delivery with quality certification.
Product Range – Custom Manufacturing & Wholesale Highway–Expressway Accessories (with Certification Documents)
1) Guardrail Bolt Set + HDG Washer
Installation Role
- Secure guardrail panels to posts or spacers, maintaining shape and impact absorption.
Key Features
- High-strength steel with HDG coating thickness per outdoor standard.
- Precisely matched head–thread–nut–washer dimensions per project specification.
- Corrosion-resistant for humid or coastal environments; long service life.
Sample Specification
- Steel Grade: Carbon steel for outdoor fasteners.
- Surface Finish: Hot-Dip Galvanized (HDG).
- Package Set: Bolt + Nut + Washer (customizable by length, diameter, and pitch).
Applications
- Highway guardrails, elevated roads, toll plazas, expressways, safety barriers.
Custom Fabrication – Guardrail Bolt (Highway & Expressway) | Samut Sakhon
STANDARD: DIN931 (ISO4014)
| Thread | G-Thread | L | A | H |
|---|---|---|---|---|
| Size | BSP | (mm) | (mm) | (mm) |
| 5/8" | 11G | 32 | 32 | 7.3 |
| 5/8" | 11G | 50 | 50 | 7.3 |
| 5/8" | 11G | 164 | 80 | 7.3 |
| 5/8" | 11G | 182 | 80 | 7.3 |
MATERIAL: GRADE 8.8
2) Block Out – Steel Spacer Between Guardrail & Post
Main Function
- Distributes impact force, increases clearance between rail and post, reduces direct stress transfer, ensuring proper system energy absorption.
Key Features
- Fabricated from thick, durable steel with accurate shape and hole alignment.
- HDG-coated for outdoor corrosion resistance.
- Available in custom sizes and thicknesses (Made-to-Spec) per highway standard.
Applications
- Highway guardrail projects, expressways, bridges, and road barriers.
3) Standard Exothermic-Welded Ground Rods + High-Conductivity OFC Copper Wire
Highway Grounding System
- Safely disperses lightning and fault currents into the ground, ensuring electrical continuity and system protection.
Welding Technology
- Exothermic Welding creates a permanent molecular bond (Copper–Copper / Copper–Steel), ensuring constant low resistance and long lifespan.
Materials
- Ground rods: Copper-bonded steel or solid copper rods, per project spec.
- OFC Copper Wire (Oxygen-Free Copper): High conductivity, low energy loss.
Additional Services
- Soil resistivity & ground resistance testing.
- Test reports and certification documents for project handover.
- Grounding design consultation and site layout optimization.
Custom Fabrication – Exothermic Ground Rods for Expressway Projects | Samut Sakhon
| Diameter (Inch) | Length (M) | Material | Type |
|---|---|---|---|
| 5/8" | 2.4 | Hot-Dip Galvanized | Ground wire 1 M + L |
| 5/8" | 2.4 | Hot-Dip Galvanized | Ground wire 1 M + Washer |
| 5/8" | 2.4 | Copper | Ground wire 1 M + L |
| 5/8" | 2.4 | Copper | Ground wire 1.5 M + L |
| 5/8" | 2.4 | Copper | Ground wire 1.5 M + Washer |
| 5/8" | 2.4 | Copper | Ground wire 1 M + Washer |
| 5/8" | 2.4 | Copper | Ground wire 2 M + Washer |
| 5/8" | 2.4 | Copper | Ground wire 3 M |
Standards – Documentation – Inspection (For Public & Private Sector Projects)
Quality Assurance
HDG coating with verified thickness suitable for outdoor & coastal environments.
Accurate hole spacing, thread pitch, and dimensions for quick on-site assembly.
Supporting Documents: Product specification sheets, test reports, coating certificates, and soil/ground resistance test reports.
Why Contractors & Project Consultants Choose PB-Trading
Field-Proven Experience & On-Time Delivery
Stock of popular sizes + custom production for project batches. Nationwide fast delivery (cost based on logistics) meeting project deadlines.
Ease of Installation & Reduced Rework
Matched bolt–washer sets for quick assembly. Precisely sized Block Out units minimize on-site drilling adjustments.
Comprehensive Documentation & Compliance
Certificates & test reports ready for inspection submission. Technical team available for specification and installation support.
Our Gallery
Nationwide Dealership Program
PB-Trading welcomes new partners to join as authorized dealers of highway and expressway equipment.
Exclusive Benefits
Dealer discount / project wholesale pricing.
Product catalogs, documentation & high-resolution images for proposals.
Training on product selection and installation techniques.
Live Visitors
All Time Visitors