Technifast supply a range of inserts designed for pre-tapped holes.  This type of insert has a standard metric internal thread and is available in through-tapped and blind-tapped versions.  The external thread is also a standard metric size.  They have a 45 degree shoulder and undercut. The lead-in is chamfered at 10 degrees. They are commonly used as a thread reducer or thread repair solution.

For the most demanding of applications we provide inserts for pre-tapped holes. These inserts are manufactured in stainless steel 303 and marine-grade stainless steel 316. We can also offer a blind-tapped version.

These type of inserts are commonly used as a thread reducer, and offer a quick and cost-effective way to decrease thread sizes or repair thread-stripped holes.


Thread Length ID OD OD Thread Type & Pitch Cutting Relief
M4 10mm M4 x 0.7mm M8 1.25mm N/A
M5 10mm M5 x 0.8mm M8 1.25mm N/A
M6 14mm M6 x 1.0mm M10 1.50mm N/A
M8 15mm M8 x 1.25mm M12 1.75mm N/A
M10 20mm M10 x 1.5mm M14 2.0mm N/A
M12 25mm M12 x 1.75mm M16 2.0mm N/A

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