BSOS-440-26 - Blind Threaded Standoffs by PennEngineering ® (PEM ® )

The PEM® BSOS-440-26 is an extended-length, high-performance unified blind threaded standoff designed to create substantial internal spacing gaps within thin sheet metal chassis. 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 stress of welding. 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 barrier against dust, air, and environmental ingress. Manufactured from premium 300 Series Stainless Steel, it delivers high structural durability and long-term corrosion protection, making it ideal for deep-stack 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.

300 Series Stainless Steel Construction: Forged from premium stainless steel to assure mechanical longevity and reliable rust defense.

Deep Unified Stacking Clearance: Supplies a precise 0.812-inch physical standoff gap, optimized for stacking multi-layer printed circuit boards or isolating sensitive, heavy electronics.