BSOS-6440-22 - STANDOFF, BLIND, STAINLESS

The PEM® BSOS-6440-22 is an extra-long, high-strength unified blind threaded standoff engineered to provide rigid structural separation inside thin sheet metal assemblies. Utilizing a field-proven self-clinching design, the fastener drops easily into a properly sized round hole and installs permanently with a standard squeezing force, cold-flowing the host metal to achieve superior torque-out and pushout resistance without the thermal distortion of welding. This unique hardware component features a #4-40 internal thread housed within a heavier, reinforced #6-32 body dimension, providing enhanced cross-sectional strength and greater stability for multi-tier configurations. Its blind-threaded (closed) cavity keeps the opposite side of the sheet metal completely flush and unmarred, creating a pristine cosmetic exterior while serving as a resilient, dust-tight barrier against environmental ingress. Manufactured from premium 300 Series Stainless Steel, it delivers high structural durability and long-term corrosion protection, making it ideal for high-density server enclosures, medical instrumentation, telecommunications housings, and aerospace sub-assemblies.

Self-Clinching Mechanical Lock: Installs rapidly with a standard pressing action to eliminate loose hardware, tapping, or the thermal stress of welding.

Closed-Bottom Blind Pocket: Guarantees that the reverse surface of the host sheet metal remains entirely flat and smooth while sealing the thread chamber from outside contamination.

Reinforced Body Design: Intelligently combines a standard #4-40 internal thread with a wider #6-32 body profile for superior joint rigidity and torque resistance.

Extended Structural Clearance: Supplies a precise 0.687-inch physical standoff gap, optimized for stacking extra-deep multi-layer printed circuit boards or isolating sensitive electronics.