Property Class 8.8 Steel (ISO 898-1 property class 8.8) is the workhorse medium-carbon alloy class for structural joints. Specified on single-end studs it determines the corrosion behaviour (requires plating (zinc) for corrosion protection) and the service temperature range (commonly limited to approx. +300 °C; confirm against the coating and the load); the dimensions are ours rather than a standard's, and are listed in full below.
Why Choose Property Class 8.8 Steel for Single-End Studs
The workhorse medium-carbon alloy class for structural joints. For single-end studs, 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 single-end studs 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 single-end studs 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 Single-End Studs Available in Property Class 8.8 Steel
| Thread size | Overall length (in) | Thread length (in) | Shaft length (in) | Material | Unthreaded end use |
|---|---|---|---|---|---|
| 6-32 | 1 | 1/2 | 1/2 | 304 stainless steel | pivot / hinge / shaft / locator |
| 6-32 | 1-1/2 | 3/4 | 3/4 | 304 stainless steel | pivot / hinge / shaft / locator |
| 6-32 | 2 | 3/4 | 1-1/4 | 304 stainless steel | pivot / hinge / shaft / locator |
| 6-32 | 2-1/2 | 3/4 | 1-3/4 | 304 stainless steel | pivot / hinge / shaft / locator |
| 6-32 | 3 | 3/4 | 2-1/4 | 304 stainless steel | pivot / hinge / shaft / locator |
| 8-32 | 1~3 | same pattern as 6-32 | same pattern as 6-32 | 304 stainless steel | pivot / hinge / shaft / locator |
| 10-24 | 1 / 1-1/2 | 304 stainless steel | pivot / hinge / shaft / locator |
Dimensions are independent of the material: every size above is available in Property Class 8.8 Steel.
Custom manufacturing · Made to drawing
Need this bolt in a grade that is not listed?
Grade 8 8 Steel is one of the grades the catalog describes. A non-standard bolt is quoted from the drawing; where one already exists in the catalog, the special is usually a variation on its tooling. Made by cold heading or hot forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
