Precision Machined B7 Hexagon Set Screws

2½”–8UN x 6½” | Rapid In-House CNC Threading & Machining

Victory Fasteners recently delivered a bespoke batch of 18 off 2½”–8UN x 6½” B7 Hexagon Set Screws, industrial fasteners, combining strategic material sourcing with advanced in-house CNC machining capabilities to meet precise engineering requirements within a tight turnaround.

Project Overview

• Product: B7 Hexagon Set Screws
• Specification: 2½”–8UN x 6½”
• Quantity: 18 pieces
• Material Grade: ASTM A193 Grade B7
• Thread Form: Unified National (UN) – 8 TPI
• Certification: 3.1 Certification & Mill Test Certificates

This project required a non-standard size fastener, where immediate availability from stock was not feasible. Victory Fasteners leveraged both its supply chain network and in-house engineering expertise to deliver a complete solution.

Strategic Material Sourcing

To meet the dimensional and material requirements, precision bolt blanks were sourced from a trusted local supplier, demonstrating the strength of Victory Fasteners’ established procurement network.

• Rapid sourcing through strategic supplier relationships
• Access to non-standard and specialist blank formats
• Reduced lead times through localised supply chain efficiency

This approach ensures flexibility when standard stock ranges do not meet project specifications.

In-House CNC Machining & Threading

Once received, the blanks were processed entirely within Victory Fasteners’ machine shop using advanced CNC machining centres.

Engineering Processes Applied:

• Precision CNC turning
• Single-point CNC thread cutting (UN thread form)
• Dimensional control and tolerance verification

The use of single-cut CNC threading ensures:

• High thread integrity and consistency
• Superior surface finish compared to rolled threads for this application
• Accurate pitch control across the full threaded length

Victory Fasteners’ continued investment in modern CNC equipment enables:

• Rapid production turnaround
• High repeatability for batch and low-volume runs
• Capability to machine large-diameter fasteners to exact specifications

Quality Assurance & Certification

All components were supplied with full traceability and compliance documentation:

• EN 10204 3.1 Certification
• Mill Test Certificates (MTCs)
• Material verification to ASTM A193 Grade B7
• Visual and dimensional inspection post-machining

This ensures suitability for critical applications across engineering, energy, and industrial sectors.

Outcome

By combining responsive sourcing with in-house CNC machining expertise, Victory Fasteners delivered:

• Fast turnaround on a non-standard fastener requirement
• Fully compliant, certified components
• A single-source solution from raw material to finished product

Key Advantages

• Bespoke Fastener Manufacturing Capability
• In-House CNC Thread Cutting & Machining
• Rapid Procurement of Non-Standard Blanks
• Full Material Traceability & Certification
• Technical Expertise Across Complex Specifications