TS 61-1

TS 61-1 is a withdrawn terminology standard that brings together terms and definitions related to screw threads. Standards of this type do not set performance limits or test requirements; instead, they support consistent technical language. Threads are fundamental in fastening, assembly, maintenance, and engineering drawings, so shared definitions reduce misunderstanding across disciplines and organisations.

The technical role of thread terminology

In general engineering use, a thread is the helical ridge and groove form on a cylindrical or tapered surface. Concepts such as pitch, profile, major and minor diameter, hand, and tolerance class are used to describe and specify threaded parts accurately. A vocabulary standard like this helps designers, manufacturers, inspectors, and documentation teams use the same meanings when discussing screws, nuts, studs, and related fastening components.

What this standard covers

Based on the supplied scope, TS 61-1 covers a glossary of terms and definitions relating to threads. The title and reference sources indicate a terminology document focused on thread language rather than a test method or a product requirement standard. It should therefore be understood as a technical reference for definitions, helping to align how threaded features and fastening terms are described.

• Provides common terms and definitions.
• Organises the language used for screw threads.
• Supports consistency across the fastener family.
• Helps keep design, manufacturing, and documentation terminology aligned.