Key traits
- High strength
- Tough / impact
- Confirm heat treat
Steel
AKA: 4140 / 42CrMo class
4140 / 42CrMo-class alloy steel for high strength — confirm heat treat/hardness with engineering before lock.

Grade and lead follow the quote options. Call out critical tolerances, temper, and masking on the drawing/notes. Material certs selectable on the quote.
Upload CAD with this grade preselected — set finish and inspection on the quote.
Work email preferred ([email protected]). Personal mail is OK. Optional — the download still works.
We’ll use this work email only to send this item and to answer your engineering questions (quote, lead time, drawings).