CHICAGO-LATROBE Straight Flute Tap: 3/8"-24 UNF, H3 / 2B, 4 Flute, Plug Chamfer, LH (MPN 317664)
The CHICAGO-LATROBE Straight Flute Tap (3/8"-24 UNF) is a left-hand thread tap with an H3 / 2B tolerance, 4 flutes, and a plug chamfer. 3G Electric interprets demand and delivers this genuine industrial tool across…
SKU 3G-OTH-265145
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Product Description
The CHICAGO-LATROBE Straight Flute Tap (3/8"-24 UNF) is a left-hand thread tap with an H3 / 2B tolerance, 4 flutes, and a plug chamfer. 3G Electric interprets demand and delivers this genuine industrial tool across 14 departments, with specialist depth in combustion, pumps, and controls as an authorised distributor.
Frequently Asked Questions
What is a CHICAGO-LATROBE Straight Flute Tap used for?
This left-hand thread tap is used to cut internal UNF threads in metal parts, typically for applications requiring reverse rotation or left-hand fasteners. It is common in automotive, aerospace, and industrial maintenance where LH threads prevent loosening under vibration.
What are the specifications of the CHICAGO-LATROBE 317664 tap?
The CHICAGO-LATROBE 317664 is a straight flute tap with 3/8"-24 UNF thread, H3 / 2B tolerance, 4 flutes, plug chamfer, and left-hand (LH) rotation. It is designed for through-hole 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, handling full logistics and customs clearance for international orders. We source genuine industrial cutting tools across 14 departments, including taps, dies, and threading accessories, and deliver to your facility.
How to select the correct tap for left-hand threads?
For left-hand threads, choose a tap marked LH with the correct thread size, pitch, and tolerance class (e.g., 3/8"-24 UNF H3). Match the chamfer type to your hole: plug chamfer for general use, taper for starting, or bottoming for blind holes. Always use cutting fluid.
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Common applications for CHICAGO-LATROBECHICAGO-LATROBE Products
3G Electric supplies CHICAGO-LATROBE left-hand thread taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.













