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Your Trusted Partner for Industrial Fasteners & Components
Mellish Engineering delivers exceptional products and services globally, specialising in high-integrity fasteners and machined components. With over two decades of experience, we combine lean manufacturing principles with robust quality systems to minimise errors and reduce lead times. Our expertise spans critical sectors such as subsea, oil & gas, nuclear, and defence, supported by API Q1, 20E, and 20F accreditations across all BSL levels. We prioritise customer satisfaction through rigorous contract reviews, advanced production techniques like CNC machining and thread rolling, and comprehensive testing.

Our commitment to quality is underpinned by the '3 Pillars' ethosfocusing on people, processes, and customersto ensure precision-engineered solutions for extreme environments. Backed by blue-chip clients and a culture of continuous improvement, we guarantee timely delivery of fully traceable components tailored to international standards or bespoke specifications.
Services
Hot Forging CNC Machining Thread Rolling Heat Treatment Mechanical Testing Coating Grinding Manual Turning
Highlights and features
  • We hold prestigious API Q1, 20E, and 20F accreditations for critical bolting.
  • Our lean manufacturing reduces waste and lead times by 22% year-on-year.
  • We serve safety-critical sectors including subsea, nuclear, and defence.
  • Our team has 22+ years of experience in high-integrity component production.
  • We guarantee full traceability and compliance with international standards.
Associations and certifications
  • API Q1
  • API 20E
  • API 20F
Services
Hot Forging
Our hot forging process creates durable fasteners by shaping metal at high temperatures. This method enhances material strength and ensures dimensional accuracy for critical applications. Ideal for producing complex geometries in subsea and industrial components.
CNC Machining
Utilising advanced CNC technology, we produce components with tight tolerances and superior surface finishes. Our vertical machining centres and sliding head machines guarantee precision for bespoke or high-volume orders across multiple sectors.
Thread Rolling
Thread rolling creates strong, wear-resistant threads through cold forming. This process improves fatigue resistance and surface finish, making it ideal for safety-critical fasteners in extreme environments like offshore installations.
Heat Treatment
We apply controlled heat treatment to enhance material properties such as hardness, strength, and durability. This ensures components meet exacting specifications for high-stress applications in oil & gas and defence sectors.
Mechanical Testing
Comprehensive mechanical testing verifies tensile strength, hardness, and impact resistance. Our in-house testing facilities ensure compliance with API standards and client-specific requirements for safety-critical components.
Questions
Which industries do Mellish Engineering Services cater to?
We serve oil & gas, nuclear, defence, renewable energy, and construction sectors requiring safety-critical fasteners and components.
What quality accreditations does Mellish hold?
We are accredited to API Q1 (10th edition), API 20E (3rd edition), and API 20F standards across all BSL levels.
Can Mellish produce custom-engineered components?
Yes, we manufacture components from bespoke drawings or reverse-engineered samples to international standards.
What materials do you work with?
We handle materials ranging from mild steel to high-performance alloys designed for extreme environments.
Do you offer emergency supply services?
Yes, we provide urgent component supply with dedicated emergency contact numbers available 24/7.