CMT Guide-Bearing Screw 1/8W x 3/8 x 1/2 Inch
Bearing Screw
1/8W × 3/8 Inch
CMT 990.058.00 is a separately sold bearing screw with verified 1/8W × 3/8-inch sizing, equivalent to 3.18W × 9.52 mm. Supporting CMT data identifies a 1/2-inch (12.7 mm) overall dimension and a 7 mm (0.276 inch) head.
Main Product Description
CMT 990.058.00 is the exact bearing screw listed in the official CMT 990 screw family. The current live variation row gives DIM 3.18W × 9.52 mm, corresponding to the published imperial designation 1/8W × 3/8 inch.
Supporting CMT spare-part data expands the designation to 1/8 × 3/8 × 1/2 inch, with the 1/2-inch value equal to 12.7 mm, and identifies a 7 mm (0.276 inch) head. This screw is used with compatible guide-bearing assemblies on multiple CMT router-bit families.
This SKU represents the screw only. The router bit, bearing, shield, hex key, spacer, and other assembly parts are not included. Compatibility must be confirmed from the exact CMT tool row or spare-parts documentation.
Best Fit Applications
Product Highlights
Verified Exact Row
The live CMT variation row confirms 3.18W × 9.52 mm for Item Code 990.058.00.
Dual-Unit Identification
Published as 1/8W × 3/8 × 1/2 inch and 3.18W × 9.52 × 12.7 mm.
Broad CMT Tool Fit
Referenced across multiple compatible CMT guide-bearing router-bit families.
Compatibility & Installation Notes
This is the screw only. Confirm Item Code 990.058.00 and every associated bearing, shield, spacer, and key reference in the exact host-tool documentation. Installation and inspection should be completed by qualified personnel with the machine safely isolated, following current CMT assembly and fastening requirements. Do not substitute a visually similar screw.
Exact Bearing Fastener for Compatible CMT Router Bits
CMT 990.058.00 provides the verified 1/8W × 3/8-inch (3.18W × 9.52 mm) bearing-screw format with supporting 1/2-inch (12.7 mm) overall data.
Reliable service depends on exact Item Code matching and compliance with the host tool’s documented bearing assembly.