Material page for snap-in nuts in Property Class 8.8 Steel (ISO 898-1 property class 8.8). 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 (zinc) for corrosion protection and the service range is commonly limited to approx. +300 °C; confirm against the coating and the load.
Why Choose Property Class 8.8 Steel for Snap-In Nuts
The workhorse medium-carbon alloy class for structural joints. For snap-in nuts, this matters when requires plating (zinc) for corrosion protection is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 898-1 property class 8.8 |
|---|---|
| Magnetic response | Magnetic |
| Service temperature | commonly limited to approx. +300 °C; confirm against the coating and the load |
| Corrosion characteristic | Requires plating (zinc) for corrosion protection |
Corrosion Behavior in Service
Carbon and alloy steel snap-in 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 Snap-In Nuts, class 10.9 or 12.9 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 Snap-In Nuts Available in Property Class 8.8 Steel
| Thread / type | Panel thickness range (in) | Square hole (in) | Outside diameter (in) | Width (in) | Height (in) | Material / temperature |
|---|---|---|---|---|---|---|
| No. 6 nylon | 0.032~0.150 | 0.280~0.285 | 1/2 | 11/32 | 23/32 | off-white nylon; 165 °F maximum |
| 6-32 steel | 0.025~0.156 | 0.375~0.380 | 0.52 or 0.54 | zinc-plated steel | ||
| 8-32 steel | 0.025~0.156 | 0.375~0.380 | 0.52 or 0.54 | zinc-plated steel | ||
| 10-24 steel | 0.025~0.156 | 0.375~0.380 | 0.52 or 0.54 | zinc-plated steel | ||
| 10-32 steel | 0.025~0.156 | 0.375~0.380 | 0.52 or 0.54 | zinc-plated steel | ||
| 12-24 steel | 0.025~0.156 | 0.375~0.380 | 0.52 or 0.54 | zinc-plated steel | ||
| 1/4-20 steel | 0.025~0.156 | 0.375~0.380 | 0.52 or 0.54 | zinc-plated steel |
Dimensions are independent of the material: every size above is available in Property Class 8.8 Steel.
Custom manufacturing · Made to drawing
Need this nut in a grade that is not listed?
Grade 8 8 Steel is one of the grades the catalog describes. Height and across-flats are the two most often changed — a thinner nut for clearance, a larger hex for a tool that is already on the line. Made by cold heading or tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
