CHICAGO-LATROBE Jobber Length Drill Bit: #4, 135° Split Point, TiAlN-Coated HSS
The CHICAGO-LATROBE Jobber Length Drill Bit #4 is a NAS-Spec High-Speed Steel jobber-length drill bit for aerospace, featuring a TiAlN-coated HSS construction with a 135° split point per NAS 907 Type B. With a…
SKU 3G-OTH-189986
Need installation or engineering help?
Ask a question
Product Description
The CHICAGO-LATROBE Jobber Length Drill Bit #4 is a NAS-Spec High-Speed Steel jobber-length drill bit for aerospace, featuring a TiAlN-coated HSS construction with a 135° split point per NAS 907 Type B. With a diameter of 0.2090 inches (MPN 42674), this bit is designed for precision drilling in demanding applications.
Frequently Asked Questions
What is the CHICAGO-LATROBE Jobber Length Drill Bit #4 used for?
This TiAlN-coated HSS drill bit is designed for aerospace applications requiring NAS 907 Type B compliance. It drills precise holes in hardened steels and high-temperature alloys, commonly used in aircraft frame assembly and engine component manufacturing.
What are the specifications of the CHICAGO-LATROBE 42674 drill bit?
The CHICAGO-LATROBE 42674 is a #4 jobber length drill bit with a 0.2090-inch diameter, 135° split point, and TiAlN coating on high-speed steel. It meets NAS 907 Type B standards for aerospace drilling, offering extended tool life in tough materials.
Where to buy CHICAGO-LATROBE drill bits worldwide?
3G Electric supplies CHICAGO-LATROBE drill bits worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the 42674 or other NAS-spec tooling.
How to select the right CHICAGO-LATROBE drill bit for aerospace work?
For aerospace drilling, match the bit's NAS type (e.g., NAS 907 Type B) to your material and hole tolerance. The 135° split point reduces walking on curved surfaces, while TiAlN coating suits high-temperature alloys. Always verify shank compatibility with your collet system.
Used in
Common applications for CHICAGO-LATROBECHICAGO-LATROBE Products
3G Electric supplies CHICAGO-LATROBE nas-spec high-speed steel jobber-length drill bits for aerospace. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















