MS pins, Military specification ball lock pins

Reliable, interchangeable, and ready to ship.

At MS Pins, we supply quick-release (ball-lock) pins that match the dimensional requirements of the well-known MS series—such as MS17990—so they drop into your fixtures, jigs, and aerospace hardware without surprises. Whether you’re replacing a legacy part or building a new assembly, our pins are made from high-grade stainless steel and use positive ball-lock retention. Need a different handle style or a lanyard? We stock common options and can help you pick the right combination for your environment and load case. We sell our ball lock pins all over the world without issues. 
Why engineers choose us

• MS-series compatible: built to the dimensional envelope of MS standards (e.g., MS17990) for interchangeability.
• Materials that last: corrosion-resistant stainless steels; tight tolerances; repeatable ball-lock action.
• Sizes that fit: common diameters and grip lengths from stock; custom lengths on request.
• Options: T-handle, button, or ring; lanyards and grommets to keep pins where you need them.