M59×1.5-6g GO
M59×1.5-6g GO ,M56×2.0-6g
ISO Metric Thread (M-Thread) Standards, Parameters, and Gauge Solutions
1. ISO Metric Thread Standards & Key Parameters
ISO metric threads (M-series) are globally standardized under ISO 68-1 (basic profile), ISO 261 (diameter and pitch combinations), and ISO 965 (tolerances)
. These threads are widely used in mechanical engineering for fasteners, pipelines, and precision equipment.
Key Features:
- Thread Angle: 60° symmetrical V-profile with sharp crests and roots
7
. - Designation: Labeled as M[Diameter]×[Pitch]-[Tolerance Class] (e.g., M8×1.25-6g).
- Tolerance Classes:
- 6g: Common tolerance for general-purpose external threads.
- Critical Dimensions:
- Pitch Diameter (D₂): D−0.6495×P
- Minor Diameter (D₁): D−1.0825×P
Applications:
2. SOWANT Precision Gage’s ISO M-Thread Plug and Ring Gages
SOWANT Precision Gage specializes in manufacturing ISO-compliant thread ring gages for quality control. Two highlighted products include:
a. M59×1.5-6g GO Ring Gage
- Application: Inspects external threads with a nominal diameter of 59 mm and pitch of 1.5 mm.
- Tolerance: 6g (medium-fit external threads).
- Design: Hardened alloy steel with chrome plating for wear resistance
- Function: GO gage must freely pass through the full thread length to verify maximum material limits
b. M56×2.0-6g Ring Gage
- Nominal Diameter: 56 mm with a coarse 2.0 mm pitch.
- Critical Dimensions:
- Minor Diameter: 56−1.0825×2=53.835mm.
- Pitch Diameter: 56−0.6495×2=54.701mm.
- Usage: Validates threads for heavy-duty machinery and industrial valves
3. 20 ISO M-Thread Ring Gage Models (Diameters >40 mm)
SOWANT offers a comprehensive range of M-thread ring gages. Below are 20 models with diameters exceeding 40 mm:
| Model | Diameter (mm) | Pitch (mm) | Tolerance Class |
|---|---|---|---|
| M42×1.5-6g | 42 | 1.5 | 6g |
| M45×1.5-6g | 45 | 1.5 | 6g |
| M48×1.5-6g | 48 | 1.5 | 6g |
| M50×1.5-6g | 50 | 1.5 | 6g |
| M52×1.5-6g | 52 | 1.5 | 6g |
| M55×1.5-6g | 55 | 1.5 | 6g |
| M56×2.0-6g | 56 | 2.0 | 6g |
| M58×1.5-6g | 58 | 1.5 | 6g |
| M59×1.5-6g | 59 | 1.5 | 6g |
| M60×1.5-6g | 60 | 1.5 | 6g |
| M64×2.0-6g | 64 | 2.0 | 6g |
| M65×1.5-6g | 65 | 1.5 | 6g |
| M68×1.5-6g | 68 | 1.5 | 6g |
| M70×1.5-6g | 70 | 1.5 | 6g |
| M72×2.0-6g | 72 | 2.0 | 6g |
| M75×1.5-6g | 75 | 1.5 | 6g |
| M80×2.0-6g | 80 | 2.0 | 6g |
| M85×2.0-6g | 85 | 2.0 | 6g |
| M90×2.0-6g | 90 | 2.0 | 6g |
| M100×3.0-6g | 100 | 3.0 | 6g |
(For full specifications, consult SOWANT’s ISO M-thread catalog or ISO 262:2023.)
4. SOWANT’s Precision Instruments: Mahr and Sylvac Tools
As an authorized distributor, SOWANT supplies high-precision tools from Mahr (Germany) and Sylvac (Switzerland):
A. Mahr Metrology Tools
Conclusion
ISO metric threads are foundational to precision engineering, and SOWANT Precision Gage ensures compliance through its advanced M-thread ring gages and partnerships with global brands like Mahr and Sylvac. From M59×1.5-6g thread validation to industrial metrology tools, SOWANT provides end-to-end solutions for quality assurance in aerospace, automotive, and energy sectors.
For detailed specifications or procurement, contact SOWANT Precision Gage or refer to ISO standards
References:
ISO 262:2023 General-Purpose Metric Threads
ISO 965-1973 Tolerance Standards
ISO 724:1993 Basic Dimensions
Thread Gage Inspection Methods
NPT vs. M-Thread Applications
M-Thread Design Principles
Mahr Calipers and Roughness Testers
Mahr and Sylvac Distributor Listings
Trimos Height Gauges
