Standards & Specifications
Reference Standards for Precision Fastening Components
Standards & Specifications provide structured reference information for fastening components used in adjustable and precision assemblies. This section consolidates commonly referenced standards, dimensional conventions, and specification frameworks related to handle screws, knob screws, clamping handles, and spring pull pins.
As a Taiwan-based manufacturer with ISO 9001–certified processes, UJEN aligns design, tooling, and production with recognized international standards to ensure compatibility, consistency, and reliable integration across global OEM applications.
Purpose of Standards & Specifications
Standards & Specifications serve as a technical reference layer for engineers and procurement teams who require clarity and consistency when integrating fastening components into their designs. This section focuses on commonly used dimensional systems, terminology, and specification logic rather than individual product models.
International Standards and Norms
UJEN fastening components are designed with reference to widely adopted international standards, including metric and imperial systems, thread conventions, and commonly recognized dimensional practices. These references support interoperability and reduce uncertainty during global sourcing and design integration.
Dimensional Conventions and Tolerances
This section explains how dimensions, tolerances, and fit relationships are typically defined for adjustable fastening components. Understanding these conventions helps engineers evaluate compatibility, assembly behavior, and repeatability in precision structures.
Material Specifications
Standards & Specifications also address material-related references, including plastics, reinforced polymers, and metals commonly used in fastening components. These references focus on performance characteristics, environmental considerations, and consistency rather than promotional material claims.
Alignment Between Standards and Manufacturing
UJEN integrates standard references into precision mold design, CNC machining, and quality control workflows. This alignment ensures that specification intent is maintained from design through production, supporting stable mass production and reliable customization.
How Engineers Use Standards in Design
Engineers rely on standards and specifications to communicate requirements, verify compatibility, and reduce design risk. This section supports early-stage design decisions by clarifying how specification frameworks are applied in real fastening applications.
The Role of Standards & Specifications within UJEN Resources
Within the UJEN Resources system, Standards & Specifications provide a shared technical foundation that supports Application Guides, Comparison & Selection Guides, Technical Resources, and Advanced Search. Together, these sections enable informed and efficient decision-making.
ISO Metric Threads (M) Reference
ISO metric threads are specified by nominal diameter and pitch (e.g., M10 × 1.5). In real procurement, misunderstandings usually come from the “acceptance...
Unified Inch Threads (UNC/UNF) + Whitworth (BSW/BSF) Reference
“Inch thread” is not a single system. Modern industrial drawings commonly use the Unified Thread Standard (UNC/UNF) with a 60° thread angle, while...
Thread Fit Language Alignment
Most thread disputes are not caused by the thread itself, but by mismatched acceptance language. A drawing might show only “M8 × 1.25” or “1/4-20”,...
Plating & Gauging Basis for Threads
Plating changes effective thread size, and thread acceptance issues often come from two hidden variables: when you gauge (pre- vs post-plating) and how the finished...
ISO Metric Thread Tolerance Classes Explained (6H / 6g and Beyond)
ISO metric thread tolerance classes (such as 6H for internal and 6g for external) are defined by a grade number plus a deviation letter. The grade number...
Grade I / II / III for Threads: How to Specify and Inspect Clearly
Grade I / II / III (or 1 / 2 / 3) is used in some supply chains as an accuracy/fit classification, and it can be verified using limit thread gauges (plug...