nedzi Tohoku Bolt Mfg.

MFG & Quality

"NEDI" — Pursuing safety and reliability with a fully integrated manufacturing system.

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The Nedzi Process

STEP 01 Cutting
STEP 02 Forging
STEP 03 Shot Blasting
STEP 04 Lathe Processing
STEP 05 Inspection
STEP 06 Shipping

Manufacturing Capabilities

Forging

Max Φ110mm

Length up to 1200mm

Lathe Processing

Max Φ300mm

Length up to 1200mm

Primary Materials

  • • High-temp Alloy (SNB)
  • • Stainless Steel (SUS)
  • • Heat-resistant (SUH)
  • • Cr-Mo Steel (SCM/SNCM)
  • • Machine Carbon Steel (SC)
  • • Grades: 4.6, 8.8, 10.9, etc.
Servo Press Induction Furnace CNC Lathe Heat Treatment

Quality Assurance

3000kN Universal Tester

Applies various loads to test objects, enabling reproduction tests and validation of product specifications.

Capacity: 3000kN

Charpy Impact Tester

Primarily evaluating the toughness of steel materials. Can conduct tests at low temperatures.

Capacity: 300J

Corrosion Testing

Evaluates surface treatment corrosion resistance under salt spray and CASS test conditions.

Standards: ISO, IEC, JIS, ASTM

Our Certified Standards

ISO 9001 : 2015
ISO 14001 : 2015
ISO 45001 : 2018
JIS E 1107 / 1108 / 1109

Nedzi Lab

Established to uncover insights into bolts, nuts, and fastening components while creating added value. We conduct specialized investigations, even research and development.

  • SEM Analysis

    Magnification up to 20,000x for fracture mechanism analysis.

  • 3D FEM Analysis

    Advanced simulation of stress distribution in specialized shapes.

Scanning Electron Microscope

Scientific Verification

A form of our
responsibility