Threading methods.
Class 3 fits.
Tight tolerance.
Precision threading reference. Class 2A/2B standard. Class 3A/3B precision. Tapping vs single-point threading.
Key principles.
Standard
Standard class. Most production threading.
Precision
Precision class. Tighter tolerance. Aerospace, instruments.
Lathe
Lathe single-point threading. Most precise. Slower.
Production
Die-cut threads on lathes. Faster than single-point.
Internal
Internal threads via tap. Standard for production.
Strongest
Cold-roll forms threads. Strongest, fastest, requires specific equipment.
FAQ
Class differences?
2A/2B (standard): typical tolerances. 3A/3B (precision): tighter, more expensive.
Where Class 3?
Aerospace, instruments, precision instruments. Requires specific machining.
Tapping vs threading?
Tapping fast for internal threads M16 and below. Threading for external or large internal.
Roll threading?
Cold-rolled threads stronger than cut threads (no fiber cut). Standard for fasteners.
Production scaling?
Standard threading at any volume. Class 3 precision premium.
Inspection?
Go/no-go gauges per class. Mating fit verified.
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