ISO 228-1 / ISO 7-1 Parallel (G) and taper (R/Rp/Rc) pipe threads

Is ISO 228-1 / ISO 7-1 still current?

Yes. ISO 228-1:2000; ISO 7-1:1994 + Cor 1:2007 is the latest edition MechAtlas found (MechAtlas review: 23 October 2026). Check the publisher for amendments before you specify it.

What it covers

Parallel (G) and taper (R/Rp/Rc) pipe threads

Equivalent and related standards

“Similar” never means interchangeable without an engineering check.

Parts that use ISO 228-1 / ISO 7-1

• Pipe threads (BSP / NPT) (ISO / EN, main)
  Inch-sized threads on pipes and fittings: taper threads seal on the thread, parallel threads need a gasket.
  ISO 7-1 R 1/2 / Rc 1/2 / Rp 1/2; ISO 228-1 G 1/2 A
  Grades: G class A/B (ISO 228-1)
  ISO 7-1 seals on thread; ISO 228-1 does not.

Official source

MechAtlas does not reproduce standards. Check the official edition at the publisher's page for ISO 228-1 / ISO 7-1 or the ISO store.

Other fasteners & threads standards

• DIN 125-1 Replaced
  Washers, product grade A, up to 250 HV
• DIN 1481 Replaced
  Heavy spring pins (old)
• DIN 2999-1 Replaced
  Whitworth pipe threads (old)
• DIN 6325 Replaced
  Hardened parallel pins m6 (old)
• DIN 6914 Replaced
  HV hex bolts for steel structures (old)
• DIN 7 Replaced
  Parallel pins (old)
• DIN 7337 Replaced
  Break mandrel blind rivets (old)
• DIN 7991 Replaced
  Hexagon socket countersunk head screws
• DIN 9021 Replaced
  Washers, outside diameter about 3 x thread
• DIN 912 Replaced
  Hexagon socket head cap screws (ISO 4762 modified)
• DIN 913 Replaced
  Hexagon socket set screws, flat point (ISO 4026 modified)
• DIN 916 Replaced
  Hexagon socket set screws, cup point (ISO 4029 modified)

All Fasteners & threads standards →