CHICAGO-LATROBE Straight Flute Tap: 1/4"-28 UNF, H2 / 2B, 4 Flute, Bottoming Chamfer (MPN 305209)
SKU 3G-OTH-221766
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Frequently Asked Questions
What is a Chicago-Latrobe 1/4"-28 UNF straight flute tap used for?
This Chicago-Latrobe straight flute tap is used for threading holes in metal parts, typically in automotive, aerospace, and general manufacturing. The 1/4"-28 UNF size creates fine threads for secure fastening, and the bottoming chamfer allows threading close to the bottom of a blind hole.
What are the specifications of the Chicago-Latrobe 305209 tap?
The Chicago-Latrobe 305209 is a straight flute tap with a 1/4"-28 UNF thread, H2 / 2B tolerance, 4 flutes, and a bottoming chamfer. It is a general purpose hand tap designed for through or blind hole threading in ferrous and non-ferrous materials.
Where to buy Chicago-Latrobe taps in worldwide?
3G Electric supplies Chicago-Latrobe taps worldwide, including the 305209 model. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote on this or any other industrial tooling needs across our 14 departments.
How to select the correct tap for a 1/4"-28 UNF thread?
Select a tap with the exact thread size and pitch, such as 1/4"-28 UNF. For blind holes, choose a bottoming chamfer tap like this Chicago-Latrobe model. Ensure the tap drill size matches the required thread depth and material hardness for clean, accurate threads.
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3G Electric supplies CHICAGO-LATROBE general purpose hand taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.














