Material page for single-end studs 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 Single-End Studs
The highest common strength class, for high-load machine assembly. For single-end studs, 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 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.
Comparable Grades
For Single-End Studs, 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 Single-End Studs Available in Property Class 12.9 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 12.9 Steel.
Custom manufacturing · Made to drawing
Need this bolt in a grade that is not listed?
Grade 12 9 Steel is one of the grades the catalog describes. Dimensions, material, finish and form are specified from the drawing — a bolt outside the standard range is a variation on existing tooling rather than a new design. Made by cold heading or hot forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
