Self-Locking Tap Extension: 3/8" (M10), 12" Length

Tap Associates - Self-Locking "Jungere" Tap Extension: 3/8" (M10) Diameter, 12" Length

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Part Number: 1080

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Self-Locking Tap Extension: 3/8" (M10), 12" Length

Unique self-locking feature offers the smallest OD of any Tap Extension in the industry and the ideal solution for close quarter & long tapping problems. No set screws or collets required!

Each extension is designed for a specific tap size. The tap shank and tap square dimensions conform to the size standards of leading tap manufacturers. Because the Tap Extension has no set screws or collars which extend shaft diameter, it offers unique capabilities in allowing the user to tap close to the edge or shoulder of the workpiece.

Product Specifications:

Tap Size		Dimensions in Inches
Standard (Inch)	Metric Conversion	A	B	C	D	E	F
Standard (Inch)	Metric Conversion	Maximum Extension Diameter	Min & Max Tap Shank Accepted	Min & Max Tap Square Accepted	Length of Small Shank of Extension	Diameter of Small Shank of Extension	Square Shank of Extension	Extension Length
3/8"	M10	.500	.376 to .381	.282 to .286	2.125	.381	0.286	12"

How does it work?

The secret to the Tap Extensions unique self-locking design is a precision machined EDM cavity that receives the end of a standard tap. The bottom part of the cavity (A) is a tapered square with a wall angle of less than one degree, which receives the square section of the tap and grips it so securely that a thin drift is needed to separate the tap and extension. The cylindrical part of the tap shank fits tightly into a similar cavity in the extension (B), providing resistance to bending.

Simple Product Set-Up:

Verify that your Tap's Shank and Square dimensions are within the acceptable ranges for the Extension.
Line up the Tap square corners with the Extension inner marks - See more at: https://tapextension.com/product/#sthash.hhY9UDHX.dpufLine up the
Line up the Tap Square corners with the Extension inner marks. Tap the Square of the Extension with a soft (brass/lead) hammer or block to seat the Tap firmly.
Square of Tap should be visible in the slot window.
To dislodge Tap from Extension, insert the supplied drift key and tap with hammer.
Click on the following links to view any of the featured video demonstrations: Hand Tap, Drill Press, CNC Machine

American Made Quality & Value

Each Self-Locking Tap Extension is precision machined from high quality tool steel and guaranteed against defects in material or workmanship. They offer all the benefits of a long tap, yet at the cost associated with a standard tap.

Available Lengths

Extensions for Tap Size 3/8" (M10) are available in 4", 6", 8", and 12" lengths.

Still not what you're looking for?

View our full line of Extensions for Machine Taps (Inch/Metric) or Pipe Taps (NPT).

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Average Customer Ratings

5.0

Kit

I have not installed, but the kit was delivered as advertised.

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Reviewed by: M H from East Point on 12/26/2025

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Tap Associates - Self-Locking "Jungere" Tap Extension: 3/8" (M10) Diameter, 12" Length

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