Material page for pocket-hole screws 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 Pocket-Hole Screws
The highest common strength class, for high-load machine assembly. For pocket-hole screws, 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 pocket-hole screws 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 Pocket-Hole Screws, 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 Pocket-Hole Screws Available in Property Class 12.9 Steel
| Length (mm) | Thread | Head form | Material options | Point |
|---|---|---|---|---|
| 19 | coarse / fine | pan / Maxi-Loc | zinc-plated steel / stainless steel | self-tapping pocket-hole point |
| 25 | coarse / fine | pan / Maxi-Loc | zinc-plated steel / stainless steel | self-tapping pocket-hole point |
| 32 | coarse / fine | pan / Maxi-Loc | zinc-plated steel / stainless steel | self-tapping pocket-hole point |
| 38 | coarse / fine | pan / Maxi-Loc | zinc-plated steel / stainless steel | self-tapping pocket-hole point |
| 51 | coarse / fine | pan / Maxi-Loc | zinc-plated steel / stainless steel | self-tapping pocket-hole point |
| 64 | coarse / fine | pan / Maxi-Loc | zinc-plated steel / stainless steel | self-tapping pocket-hole point |
Dimensions are independent of the material: every size above is available in Property Class 12.9 Steel.
Custom manufacturing · Made to drawing
Need this screw 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 warm forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
