RapidBoltNORSOK M-650 BoltingQualified Fastener Supplier
High-integrity fasteners qualified to NORSOK M-650 for the world's most demanding offshore applications. Super Duplex, Nickel Alloys, and specialty materials with complete QTR documentation.
Developed for the harsh conditions of North Sea operations, NORSOK standards represent the gold standard for material qualification in the global petroleum industry.
Understanding NORSOK M-650 & M-630
NORSOK M-650
Qualification of Manufacturers of Special Materials — This standard establishes comprehensive requirements to verify that manufacturers have sufficient competence, experience, facilities and equipment to produce special materials to the stringent requirements of the offshore petroleum industry.
Qualification testing must be witnessed by an independent Qualifying Company (EN 10204:3.2) and documented in a Qualification Test Report (QTR) valid for 5 years.
Applies to: Duplex SS, Super Duplex SS, High-alloy Austenitic SS (6Mo), Nickel Alloys, Titanium castings
NORSOK M-630
Material Data Sheets for Piping — A comprehensive collection of Material Data Sheets (MDS) that define specific requirements for each material grade and product form used in piping systems.
Each MDS specifies chemical composition limits, mechanical properties, heat treatment requirements, testing protocols, and acceptance criteria that form the basis for M-650 qualification testing.
Key MDS for bolting: D45, D51, D56, D57 (Duplex), N01, N02, N04 (Nickel Alloys), A41, A45 (6Mo)
Qualification Test Report (QTR)
The QTR is the official documentation that confirms a manufacturer has fulfilled all requirements of NORSOK M-650. It includes the Manufacturing Summary detailing each step of the production process, all test results, and is co-signed by both the Manufacturer and the independent Qualifying Company.
NORSOK M-650 Qualification Framework
Manufacturers must demonstrate comprehensive capability across facilities, processes, testing, and quality management to achieve NORSOK qualification.
Facility Assessment
Manufacturing facilities must be evaluated for equipment capability, process control, and environmental conditions.
Testing Laboratories
Test labs must hold ISO 17025 accreditation or undergo evaluation by the Qualifying Company.
Manufacturing Summary
Detailed documentation of every manufacturing step from raw material to finished product.
Quality Management
ISO 9001 certified quality management system with full traceability requirements.
NORSOK M-650 Qualified Fasteners
Complete range of bolting products manufactured to NORSOK M-650 qualification requirements with full QTR documentation and EN 10204:3.2 certification.
Stud Bolts
- Fully threaded studs
- Tap end studs
- Double end studs
- Continuous threaded rod
To ASME B16.5, B16.47 & API 6A
Hex Bolts & Sets
- Heavy hex bolts
- Structural bolting sets
- Through bolts
- Anchor bolts
Per ASTM A320, A453, A182
Nuts
- Heavy hex nuts
- Jam nuts
- Coupling nuts
- Slotted nuts
Matched to stud material grades
Socket Head Fasteners
- Socket head cap screws
- Socket set screws
- Socket button head
- Socket countersunk
Per ASTM F2281, F2882
Washers & Spacers
- Flat washers
- Spring washers
- Tab washers
- Custom spacers
Hardened & non-hardened
Special & OEM Items
- Custom fasteners
- Ring joint bolting
- Clamp connectors
- Subsea specials
Engineered to specification
Equinor MDS & VN Bolting Specifications
EMG supplies bolting manufactured to Equinor's proprietary MDS and VN specifications through our network of NORSOK-qualified production partners. We regularly fulfil orders against these material data sheets in both imperial and metric formats across all commonly specified grades.
NORSOK D59 & D60 – Super Duplex Bolting
D59 / D59L – Strain Hardened
25Cr Super Duplex (UNS S32750 / S32760) in strain hardened condition, delivering elevated yield strength for demanding subsea connector and wellhead applications.
Available: 0.500" – 2.000"
D60 / D60L – Solution Annealed
25Cr Super Duplex (UNS S32750 / S32760) in solution annealed condition, providing maximum corrosion resistance for topside piping and process equipment.
Available: 0.500" – 2.500"
Equinor VN Bolting Specifications
| VN Code | Component | Material Specification | Coating / Condition |
|---|---|---|---|
| VN101 | Stud Bolt | ASTM A193 B7 | Hot Dip Galvanised |
| VN102 | Nut | ASTM A194 2H | Hot Dip Galvanised |
| VN201 | Stud Bolt | ASTM A320 L7 / L43 | Hot Dip Galvanised |
| VN202 | Nut | ASTM A194 7L | Hot Dip Galvanised |
| VN301 | Stud Bolt | ASTM A320 B8M Class 2 | Bare (CRA) |
| VN302 | Nut | ASTM A194 8M | Bare (CRA) |
| VN501 | Stud Bolt | ASTM F468 Titanium Gr. 5 | Bare |
| VN502 | Nut | ASTM F467 Titanium Gr. 5 | Bare |
| VN701 | Stud Bolt | ASTM F468 Alloy 625 (UNS N06625) | Bare (CRA) |
| VN702 | Nut | ASTM F467 Alloy 625 (UNS N06625) | Bare (CRA) |
| VN704 | Bolt / Stud | API 6ACRA Alloy 718 (UNS N07718) 120K | Bare (CRA) |
Additional Equinor MDS References
| MDS | Material Specification | Application |
|---|---|---|
| MDS N20 | API 6ACRA Alloy 718 (UNS N07718) 120K | Subsea & wellhead bolting, HPHT service |
Supplied Through Qualified Partners: EMG sources all Equinor VN and MDS-specified bolting from NORSOK M-650 qualified manufacturers holding valid QTRs. Every consignment is accompanied by full material certification and compliance documentation referencing the applicable VN or MDS designation. Contact our team for specific grade availability or project-specific documentation requirements.
Where NORSOK M-650 Bolting is Used
NORSOK qualified fasteners are specified for the most critical applications in offshore and subsea operations where material integrity is paramount.
Subsea Systems
- Subsea Christmas trees
- Manifolds & templates
- Risers & flowlines
- Umbilical terminations
Offshore Platforms
- Topsides piping
- Process modules
- Flare systems
- Platform jackets
Production Equipment
- Wellhead assemblies
- Blowout preventers (BOPs)
- Choke & kill manifolds
- Production separators
FPSO & Floating Units
- Turret systems
- Swivel stacks
- Mooring systems
- Hull connections
Valves & Actuators
- Ball & gate valves
- Check valves
- Safety relief valves
- Actuator mounting
Pipeline Systems
- Pipeline clamps
- Repair systems
- Anode connections
- Mechanical connectors
Your NORSOK Qualified Bolting Partner
EMG delivers NORSOK M-650 qualified fasteners with the documentation, traceability, and service levels required for critical offshore projects worldwide.
Qualified Supply Chain
All materials sourced from NORSOK M-650 qualified manufacturers with valid QTRs verified and on file.
Complete Documentation
Full material certification packages including EN 10204:3.2, QTR references, and MDS compliance statements.
ISO 9001:2015 Certified
Quality management system certified by accredited bodies ensuring consistent quality and traceability.
Global Delivery
Worldwide logistics network with expedited shipping options for offshore and remote project locations.
Emergency Response
24/7 support for urgent offshore requirements with fast-track processing and air freight options.
Technical Expertise
Experienced team providing material selection guidance, specification review, and application support.
Documentation & Downloads
Access technical documentation, certifications, and material specifications for NORSOK qualified products.
NORSOK M-650 Overview
Qualification standard summary
MDS Quick Reference
Material data sheet guide
QTR Requirements
Documentation checklist
Material Certificates
Sample EN 10204:3.2 certs
Get NORSOK M-650 Bolting for Your Project
Submit your requirements and our team will provide competitive pricing with full documentation packages. Global supply capability with quick response guarantee.
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