Check the hole with perfect

Check the inside threaded dia

Check tapered hole with perfect fit

Check the taper accuracy of outside dia

For lubrication

Permit clearance

For expansion

Permit feeding of lapping compound

Diamond

Boron carbide

Silicon carbide

Aluminium oxide

Filing operation

Grinding operation

Chiseling operation

Precision finishing operation

Pitch x no of starts

Lead x no of starts

Pitch x major diameter

Pitch x minor diameter