DIN 933 Hexagon screws — legacy reference

Is DIN 933 still current?

No, it has been replaced. DIN 933 has been replaced by ISO 4017 (MechAtlas review: 12 October 2026). Use the replacement for new work, and check differences before interchanging parts.

What it covers

Legacy fully threaded hexagon screw identifier encountered on drawings.

Material

Steel

Typical application

General machinery

What you specify

Thread diameter; across-flats; length

Watch out

Compare the specified historical edition with ISO 4017; do not assume interchangeability.

Before you interchange parts

• DIN 933 → ISO 4017: Stock often labelled DIN 933 but made to ISO
• DIN 933 → ISO 4017 / EN ISO 4017 (stated by catalogue): Catalogue prints 'in compliance with ISO 4017'. Also sold in DIN packages.

Parts that use DIN 933

• Hex head screw (fully threaded) (Germany (DIN), old)
  Hexagon head screw threaded up to the head, used into tapped holes or with a nut where a plain shank is not needed.
  DIN 933 - M10 x 40 - 8.8
  Legacy; replaced by DIN EN ISO 4017.

Official source

MechAtlas does not reproduce standards. Check the official edition at the publisher's page for DIN 933 or the DIN 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 →