Serrated T-Slot Bolts for Aluminum Profiles manufactured in Property Class 12.9 Steel (ISO 898-1 property class 12.9) are dimensioned to GN 505.4. The sections below give the mechanical and physical properties of the grade, its behavior in corrosive and elevated-temperature service, and the full size table.
Why Choose Property Class 12.9 Steel for Serrated T-Slot Bolts for Aluminum Profiles
The highest common strength class, for high-load machine assembly. For serrated t-slot bolts for aluminum profiles, 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 serrated t-slot bolts for aluminum profiles 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 Serrated T-Slot Bolts for Aluminum Profiles, 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 Serrated T-Slot Bolts for Aluminum Profiles Available in Property Class 12.9 Steel
| Size | Slot width · 20 series (mm) | Slot width · 30 series (mm) | Slot width · 40 series (mm) | Slot width · 45 series (mm) | e1 · 20 series (mm) | e1 · 30 series (mm) | e1 · 40 series (mm) | e1 · 45 series (mm) | e2 · 20 series (mm) | e2 · 30 series (mm) | e2 · 40 series (mm) | e2 · 45 series (mm) | h · 20 series (mm) | h · 30 series (mm) | h · 40 series (mm) | h · 45 series (mm) | k · 20 series (mm) | k · 30 series (mm) | k · 40 series (mm) | k · 45 series (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M5 | 6 | 6 | 10 | 5 | 3.5 | 10~25 | GN 505.4 | |||||||||||||||
| M6 | 8 | 8 | 15.5 | 7 | 5 | 12~30 | GN 505.4 | |||||||||||||||
| M8 | 8.2 | 8.5 | 8.2 | 8.5 | 18 | 19 | 9.5 | 10 | 5.5 | 5.5 | 16~45 | GN 505.4 |
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. Head form and drive can be specified to the assembly rather than to a standard: a larger bearing face, a security drive, or a socket sized for the tool already on the bench. Made by cold heading or hot forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
