Material page for solderable smt nuts in Property Class 12.9 Steel (ISO 898-1 property class 12.9). The sizes below are the ones we supply; there is no published dimensional standard for this article, so the table rather than a standard number is what to quote. Corrosion behaviour is requires plating or black-oxide protection and the service range is commonly limited to approx. +300 °C; confirm against the coating and the load.
Why Choose Property Class 12.9 Steel for Solderable SMT Nuts
The highest common strength class, for high-load machine assembly. For solderable smt nuts, this matters when requires plating or black-oxide protection is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 898-1 property class 12.9 |
|---|---|
| Magnetic response | Magnetic |
| Service temperature | commonly limited to approx. +300 °C; confirm against the coating and the load |
| Corrosion characteristic | Requires plating or black-oxide protection |
Corrosion Behavior in Service
Carbon and alloy steel solderable smt nuts require a coating for corrosion protection. Zinc plating (with or without passivation) is the most common; hot-dip galvanizing is used for outdoor structural service; black-oxide is mainly a tarnish-prevention finish for tool-room use.
Comparable Grades
For Solderable SMT Nuts, class 8.8 is the comparable strength step. Move up when the joint preload approaches the proof load of the current class; move down when the joint is over-specified. For corrosion-critical service, switch to stainless A2 or A4.
Sizes of Solderable SMT Nuts Available in Property Class 12.9 Steel
| Thread size | Material | Supply | Board installation | Adhesive spot |
|---|---|---|---|---|
| M2 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |
| M2.5 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |
| M3 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |
| M4 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |
| M5 | tinned steel | taped and reeled | solder into plated-through or non-plated hole | with or without |
Dimensions are independent of the material: every size above is available in Property Class 12.9 Steel.
Custom manufacturing · Made to drawing
Need this nut in a grade that is not listed?
Grade 12 9 Steel is one of the grades the catalog describes. Thread, height, across-flats, property class, locking feature and flange form can all be varied, including thread sizes the standard series does not run to. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
