SP

SL

PO

ST

Metric Screw Threads (M, MF) Unified Screw Threads (UN)

Internal Internal Threads Threads

External External Threads Threads

Threads per inch

Whitworth Screw Threads (BSW) Screw Threads for Sewing Machine (SM)

ROLL

CARBIDE

LONG

Miniature Screw Threads (S)

Internal Internal Threads Threads

External External Threads Threads

Threads per inch Threads per inch

Parallel Pipe Threads (G-BSP)

HAND Internal Internal Threads TAPS Threads

External External Threads Threads

EG (STI)

SPECIAL Threads per inch THREADS,

GAUGES Taper Pipe Threads (Rc-BSPT) Parallel Internal Pipe Threads (Rp-BSPP)

THREAD Internal Threads Internal MILLS Threads

DIES External Threads Central axis line of thread Central axis line of thread

CENTER Threads per inch Threads per inch

DRILLS