Anyone try this kit to repair side post battery terminals?

Kit worked great. I will buy another set if I need it

What’s the installed thread length of the inserts? Specifically 5/16-18

Did not measure the insert length, but most inserts are approx 1/2" long in this size range. It only has to be as long as the diameter of the boat to be full strength. So if it is a 5/16 insert the insert needs to be at least 5/16 long. These are. But the tool is junk, I suggest buying a name brand US. Made tool.

If the thread id of the helicoil is m8x1.25, so what is the od of that helicoil?

You purchase the kit you need depending on the thread type you are attempting to repair.

Bilitools M8x1 25 Thread Repair Kit Hss Drill Helicoil Repair

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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57382CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Fix it like a pro—thread repair made effortless and durable!

VERSATILE APPLICATION - Perfect for automotive, plumbing, and industrial repairs across metals, polymers, and composites.
DURABILITY MEETS STRENGTH - 304 stainless steel inserts create longer-lasting threads capable of handling higher torque in weaker metals.
ALL IN ONE REPAIR SOLUTION - Includes HSS drill, tap, stainless steel inserts, installation & break pin tools—everything in one compact iron case.
UNMATCHED DRILL EFFICIENCY - 135° apex angle drill bit ensures faster, cleaner penetration through metals and composites.
PRECISION THREAD RESTORATION - Restore stripped threads with exact M8x1.25 metric sizing for a flawless fit every time.

The BILITOOLS M8X1.25 Thread Repair Kit is a professional-grade solution designed to restore and strengthen damaged internal threads. Featuring a high-efficiency 135° apex HSS drill, durable 304 stainless steel inserts, and a comprehensive set of tools neatly organized in a portable iron case, this kit is ideal for automotive, plumbing, and industrial applications across a variety of materials. Trusted by thousands with a 4.6-star rating, it ensures precision, durability, and convenience in every repair.

Specifications

ASIN	B09WN4QTNL
Assembly Required	No
Brand	BILITOOLS
Colour	Metric
Customer Reviews	4.6 4.6 out of 5 stars (568)
Date First Available	1 July 2022
Item Weight	510 g
Item part number	B09WN4QTNL
Manufacturer	BILITOOLS
Manufacturer Part Number	B09WN4QTNL
Package Dimensions	17.4 x 13.6 x 3.9 cm; 510 g
Special Features	durable

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