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CHICAGO-LATROBE 5/16"-18 UNC Spiral-Point Extension Tap - Spiral-Point Extension Taps
CHICAGO-LATROBESpiral-Point Extension Taps

CHICAGO-LATROBE 5/16"-18 UNC Spiral-Point Extension Tap

The CHICAGO-LATROBE Extension Tap (SKU 3G-OTH-313557) is a 5/16"-18 UNC spiral-point extension tap, type H11 with a plug chamfer, made of high-speed steel and featuring 3 flutes (MPN 313545). 3G Electric sources this…

SKU 3G-OTH-313557

Brand
CHICAGO-LATROBE
Item
5/16"-18 UNC Spiral-Point Extension Tap
Part Number
313545
Category
Spiral-Point Extension Taps
Available to Order
Also known as:313545CHICAGO-LATROBE
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Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
313545
Type
H11, Plug Chamfer, High Speed Steel
Flute
3

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

Product Description

The CHICAGO-LATROBE Extension Tap (SKU 3G-OTH-313557) is a 5/16"-18 UNC spiral-point extension tap, type H11 with a plug chamfer, made of high-speed steel and featuring 3 flutes (MPN 313545). 3G Electric sources this genuine industrial tool across 14 departments, with specialist expertise in combustion, pumps, and controls ensuring accurate fulfillment.

Frequently Asked Questions

What is a CHICAGO-LATROBE extension tap used for?

A CHICAGO-LATROBE extension tap is used for threading blind or deep holes where standard taps cannot reach. It is common in machining, automotive, and general manufacturing applications requiring precise internal threads in hard-to-access locations.

What are the specifications of the CHICAGO-LATROBE 313545 extension tap?

The CHICAGO-LATROBE 313545 is a 5/16"-18 UNC extension tap with H11 tolerance, 3 flutes, plug chamfer, and high-speed steel construction. It is designed for threading blind holes and provides good chip evacuation in ferrous and non-ferrous materials.

Where to buy CHICAGO-LATROBE extension taps worldwide?

3G Electric supplies CHICAGO-LATROBE extension taps worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the 313545 model.

How to select the right extension tap for deep hole threading?

Select an extension tap based on thread size, pitch, material, and hole depth. For blind holes, use a plug or bottoming chamfer. The CHICAGO-LATROBE 313545 with H11 tolerance suits general-purpose threading. Ensure the tap length exceeds the hole depth for proper engagement.

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 spiral-point extension taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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