Property Class 8.8 Steel Pocket-Hole Screws are supplied to our own published dimensions — this is a trade-series article rather than one covered by a dimensional standard, so confirm the figures against the part you are replacing. The grade provides requires plating (zinc) for corrosion protection and is magnetic; the practical service range is commonly limited to approx. +300 °C; confirm against the coating and the load.
Why Choose Property Class 8.8 Steel for Pocket-Hole Screws
The workhorse medium-carbon alloy class for structural joints. For pocket-hole screws, 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 |
Galvanic & Galling Considerations
For pocket-hole screws 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.
Comparable Grades
For Pocket-Hole Screws, 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 Pocket-Hole Screws Available in Property Class 8.8 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 8.8 Steel.
Custom manufacturing · Made to drawing
Need this screw in a grade that is not listed?
Grade 8 8 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.
