INSERTS FOR PRE-TAPPED HOLES / THREAD REDUCERS
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 |