Identification and standards

Identification and translation of threads, drilling of fasteners

4 tools

Typical tasks: received foreign equipment without documentation - you need to determine the type of thread based on measurements; find a metric equivalent of inch fasteners; drill out the broken bolt without damaging the threads in the body.

Imperial / Pipe Thread - Definition

Identifies the thread type by outside diameter, pitch, or threads per inch (TPI). Delineates UNC, UNF, BSW, BSF, NPT, NPTF, G, Rc and other standards.

EnterØ (mm or inch), pitch mm or TPI

Bottom lineThread designation, standard, accuracy class

UNC · UNFBSW · BSFNPTG · Rc

Define thread→

Inch thread → metric

Selects the closest metric equivalent of an inch thread. Shows differences in diameter and pitch, assesses compatibility for temporary replacement of fasteners.

EnterInch thread designation (e.g. 3/8-16 UNC)

Bottom lineMetric equivalent, Ø and pitch deviation, note

UNC → MUNF → MBSW → M

Find an analogue→

Metrica → inch analogues

Reverse translation: selects an inch analogue for a metric thread. Useful when working with American and British equipment or export deliveries.

EnterMetric thread designation (eg M10×1.5)

Bottom lineClosest UNC / UNF / BSW analogue with deviations

M → UNCM → UNFM → BSW

Find an analogue→

Drilling bolts, studs, taps

Options for drilling out a broken fastener or tap without damaging the threads in the body. Drilling diameter, centering, tool for removing residue.

EnterThread type and size, part material, type of failure

Bottom lineDrill Ø, extraction strategy, recommended extractor

Bolts M3–M48HairpinsTapsInch

Select parameters→

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