For thin nylon insert lock nuts (din 985) in Property Class 12.9 Steel, the controlling selection factors are corrosion exposure, strength requirement and service temperature. The grade data for Property Class 12.9 Steel (ISO 898-1 property class 12.9) is summarized below together with every size supplied.
Why Choose Property Class 12.9 Steel for Thin Nylon Insert Lock Nuts (DIN 985)
The highest common strength class, for high-load machine assembly. For thin nylon insert lock nuts (din 985), 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 thin nylon insert lock nuts (din 985) 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.
Galvanic & Galling Considerations
For thin nylon insert lock nuts (din 985) in steel, the dominant compatibility issue is hydrogen embrittlement at high property classes (10.9 and above) when electroplated. Plating must be followed by an appropriate baking treatment, or a non-electroplated finish (mechanical zinc, zinc flake) should be substituted.
Sizes of Thin Nylon Insert Lock Nuts (DIN 985) Available in Property Class 12.9 Steel
| Thread size | Pitch (mm) | Width across flats s (mm) | Total height m (mm) | Max service temperature (u00b0C) | Re-use | Property class | Reference standard |
|---|---|---|---|---|---|---|---|
| M5 | 0.8 | 8.0 | 5.0 | 120 | 5 cycles typical | 8 | DIN 985 |
| M6 | 1.0 | 10.0 | 6.0 | 120 | 5 cycles typical | 8 | DIN 985 |
| M8 | 1.25 | 13.0 | 8.0 | 120 | 5 cycles typical | 8 | DIN 985 |
| M10 | 1.5 | 17.0 | 10.0 | 120 | 5 cycles typical | 8 | DIN 985 |
| M12 | 1.75 | 19.0 | 12.0 | 120 | 5 cycles typical | 8 | DIN 985 |
| M16 | 2.0 | 24.0 | 16.0 | 120 | 5 cycles typical | 8 | DIN 985 |
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 size is the obvious variable and rarely the interesting one — height for clearance, across-flats for the tool already in the cell, and the locking feature for the vibration actually present. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
