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FLEX Series

One terminal body, swappable heads for top-post, side-post and threaded-stud batteries.

Modular Heavy-Duty Battery Terminal

Modular Heavy-Duty Battery Terminal

4.4★ · 93 reviews
Heavy-Duty Interchangeable-Head Terminals

Heavy-Duty Interchangeable-Head Terminals

4.4★ · 93 reviews

Independently tested, not just claimed

Anyone can print "aircraft-grade aluminium" on a listing. We had ours tested by SGS, an independent laboratory, and we publish the report numbers so you can ask for them.

SeriesSGS reportDateResult
STINGKK-25-09211A13 Sep 2025A6061-T6 composition verified · 46.0% IACS
EagleKK-26-0449805 Jun 202648.0% IACS
FLEXKK-26-0449905 Jun 202646.7% IACS

Electrical conductivity tested to ASTM E1004-23. IACS is the standard scale for how well a metal conducts — the figures above are measured on our own parts, not quoted from a material datasheet. Machined and tested in Taiwan. See the actual test reports →

Coming: Battery Terminal Fitment & Torque Guide

Post identification chart, the four measurements to take in your own engine bay, torque table, and a print-to-scale paper template you can hold against your battery before you order. Body dimensions are already published in the dimension table.

We are still measuring — every dimension in the guide is taken off the actual product rather than a drawing, and we would rather publish it late than publish a number we have not verified. There is no signup form here yet because we have nothing to send you yet. When the guide is ready this box becomes the place to get it.

See what has been measured so far →