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CHICAGO-LATROBE 5/16"-24 UNF Spiral-Point Extension Tap - Spiral-Point Extension Taps
CHICAGO-LATROBESpiral-Point Extension Taps

CHICAGO-LATROBE 5/16"-24 UNF Spiral-Point Extension Tap

The CHICAGO-LATROBE Spiral Point Tap (MPN 918939) is a 5/16"-24 UNF spiral-point extension tap made from high-speed steel with a plug chamfer, H3 / 2B tolerance, and 2 flutes.

SKU 3G-OTH-313641

Brand
CHICAGO-LATROBE
Item
5/16"-24 UNF Spiral-Point Extension Tap
Part Number
918939
Category
Spiral-Point Extension Taps
Available to Order
Also known as:918939CHICAGO-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
918939
Type
H3 / 2B, Plug Chamfer, High Speed Steel
Flute
2

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

Product Description

The CHICAGO-LATROBE Spiral Point Tap (MPN 918939) is a 5/16"-24 UNF spiral-point extension tap made from high-speed steel with a plug chamfer, H3 / 2B tolerance, and 2 flutes.

Frequently Asked Questions

What is the CHICAGO-LATROBE Spiral Point Tap 918939 used for?

This spiral point tap is designed for threading blind or through holes in metal. Its 5/16"-24 UNF size and plug chamfer make it suitable for production tapping in steel, aluminum, and alloys. The high-speed steel construction provides durability for general industrial machining applications.

What are the specifications of the CHICAGO-LATROBE Spiral Point Tap 918939?

The tap has a 5/16"-24 UNF thread size with H3 / 2B tolerance, 2 flutes, and a plug chamfer. It is made of high-speed steel and is a spiral-point extension tap. The manufacturer part number is 918939, and the SKU is 3G-OTH-313641.

Where to buy the CHICAGO-LATROBE Spiral Point Tap 918939 worldwide?

3G Electric supplies the CHICAGO-LATROBE Spiral Point Tap 918939 worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this tap for your machining needs.

How to select the correct CHICAGO-LATROBE Spiral Point Tap for my application?

Select based on thread size, material, and hole type. For blind holes, use a spiral point tap like this 5/16"-24 UNF model. Match the tap tolerance (H3) to your required thread class (2B). High-speed steel works for general metals; consult a tap selection guide for specific alloys.

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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