Case Study: M12 × 90 DIN 933 Hexagon Head Set Screws

Manufactured from Round Bar

Precision Machining from Raw Material to Finished Fastener

At Victory Fasteners, we regularly manufacture high-quality fasteners from raw material to meet customer-specific requirements. This project involved producing a batch of M12 × 90 DIN 933 Grade 31803 (D6-80) Hexagon Head Set Screws, manufactured entirely in-house from sourced round bar.

Working closely with our trusted strategic supply partners, we secured high-quality round bar from a local supplier before completing every machining operation through our internal engineering department.

The result was a fully inspected, precision-engineered product delivered to specification and ready for use.

Project Overview

Product: Hexagon Head Set Screw
Specification: DIN 933
Size: M12 × 90
Material Grade: 31803 (D6-80) Duplex Stainless Steel
Manufacturing Method: Machined from round bar
Inspection: In-house dimensional inspection

Material Procurement & Supply Chain

Every successful manufacturing project begins with reliable material sourcing.

For this order, Victory Fasteners worked with established local suppliers and strategic supply chain partners to source premium 31803 (D6-80) Duplex Stainless Steel round bar. Maintaining close supplier relationships enables us to achieve dependable lead times while ensuring complete material traceability throughout production.

Precision Manufacturing Process

Each fastener was produced using Victory Fasteners' in-house machining capabilities.

The manufacturing sequence included:

• Cutting round bar to length
• Precision turning to required dimensions
• Milling the hexagon head profile
• Machining the metric thread
• Permanent component etching for identification and traceability
• Final dimensional inspection

Every stage was completed to achieve the dimensional accuracy and consistency required by the DIN 933 specification.

Quality Inspection

Before dispatch, every batch undergoes comprehensive inspection to verify:

• Overall length
• Thread accuracy
• Hexagon dimensions
• Surface finish
• Machined features
• Overall dimensional conformity

This quality-focused approach ensures customers receive components manufactured to specification and ready for production.

Applications

Duplex stainless steel DIN 933 hexagon head set screws are commonly specified for demanding environments including:

• Marine engineering
• Offshore applications
• Oil & gas
• Petrochemical processing
• Water treatment
• Chemical processing
• Renewable energy
• Heavy industrial equipment

The corrosion resistance and mechanical strength of Duplex 31803 (D6-80) make it particularly suitable for challenging operating conditions.

Why Victory Fasteners?

Victory Fasteners offers complete manufacturing solutions from raw material through to finished component, including:

• Material sourcing through trusted supplier partners
• CNC turning and milling
• Precision thread machining
• Component identification and etching
• In-house quality inspection
• Full manufacturing traceability
• Small and large production batches
• Responsive lead times

Whether producing standard fasteners or bespoke engineered components, our team combines technical expertise with dependable service to support customers across a wide range of industries.

Looking for a Manufacturing Partner?

Victory Fasteners manufactures standard and customer-specific fasteners from a wide range of carbon steels, alloy steels, stainless steels and specialist materials. From material procurement through to final inspection, we deliver precision-engineered fastening solutions backed by quality, traceability and technical expertise.