Thread profiles

Specifications:      Used for:
ISO M og UN

All trades of mechanical industry

UNJ

Aviation and Aerospace Industries

Original Sellers og Sl

Gradually replaced by ISO

SF (Systeme Francais)

Gradually replaced by ISO

Metrisk konisk

Lubricating nipples and pipe fittings

Whitworth

Formerly one of the most common threads. Gradually replaced by ISO

BSPT

Gas, steam and water supply

BS Gascylinder

Gas cylinders and other pressure cylinders

B.A. (British Association)

Precision Engineering; electrical appliances and other electronics 

BSC (CEI)

Bicycle Industry

Tr DIN 103

Mechanical Industry for rotary threads

RD DIN 405

Pipe fittings for the food industry and fire equipment

Acme

Mechanical Industry for rotary threads

Acme lav

As Acme, but especially for threads with small metal thickness and a large pitch

Savgevind 30° DIN 513

Mechanical Industry for unilateral axial stress

Engelsk Buttress

Mechanical Industry for unilateral axial stress

Amerikansk Buttress

Mechanical Industry for unilateral axial stress

NPT

Electric fittings

Dryseal

Engine Industry for waterproof pipe fittings

NPS

Non-waterproof pipe fittings

NPSL, NPSM, NPSH

Mechanical lock for pipe fittings, normally non-waterproof

API: konicitet 1:16 og 1:32 (spids)

Oil Industry

API: konicitet 1:16 (rund)

Oil Industry

API: konicitet 1:16 (V-0.038R)

Oil Industry

API BUT

Oil Industry for casing

Hughes H-90

Oil Industry

Pg

Installation pipes, electronics