MS21209C4-15 | إدراجات حلزونية عسكرية | فولاذ مقاوم للصدأ 304 (90 / عبوة)

Used a full pack on a fabrication job last week and every single insert seated flush without a single cross-thread. The 304 stainless is noticeably tough — no galling even when I torqued them down tight. For ninety pieces at this price, they're a solid stock-up.

Threads cut cleanly and seated perfectly in aluminum for a dozen test holes—the 304 stainless held up without any galling or snagging. Having a full 90-count pack means I won't be rationing inserts for the next big job.

The stainless steel threads gripped perfectly when I installed them into a tapped aluminum frame, and the entire 90-pack came neatly organized without any tangles.