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3G Electric
CHICAGO-LATROBE Straight Flute Tap: 3/8"-24 UNF, H3 / 2B, 4 Flute, Plug Chamfer, LH (MPN 317664) - Left-Hand Thread Taps
CHICAGO-LATROBELeft-Hand Thread Taps

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.

SKU 3G-OTH-265145

Brand
CHICAGO-LATROBE
Item
Straight Flute Tap: 3/8"-24 UNF, H3 / 2B, 4 Flute, Plug Chamfer, LH
Part Number
317664
Category
Left-Hand Thread Taps
Available to Order
Also known as:317664CHICAGO-LATROBE
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
317664
Type
H3 / 2B, Plug Chamfer, LH
Flute
4

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CHICAGO-LATROBE Products
3G Electric (S) Pte. Ltd. — Singapore

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.

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.

Used in

Common applications for CHICAGO-LATROBE
Aerospace manufacturing — Chicago-Latrobe NAS-spec jobber-length drill bits (e.g., MPN 42631) for drilling holes in airframe components.
Metal fabrication — Chicago-Latrobe single-flute countersinks (e.g., MPN 56774) for deburring and chamfering holes in steel plates.
Machine shop — Chicago-Latrobe 82° countersinks (e.g., MPN 56738) for creating flush-mount recesses for flat-head screws in assemblies.
Maintenance and repair — Chicago-Latrobe 90° countersinks (e.g., MPN 56760) for chamfering holes and removing burrs on industrial equipment.
Automotive production — Chicago-Latrobe HSS drill bits for holemaking in engine blocks and chassis components.
General machining — Chicago-Latrobe countersinks in various body diameters for chamfering and deburring in job shops.
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CHICAGO-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.

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