Product Description
The PEM® BSOS-6440-15 is a high-precision, unified blind threaded standoff designed to create secure internal spacing within thin sheet metal panels. 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 structural 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 joint rigidity. Its blind-threaded (closed) cavity keeps the opposite side of the sheet metal completely flush and unmarred, ensuring an unbroken cosmetic exterior while shielding internal components from dust, moisture, and environmental ingress. Manufactured from premium 300 Series Stainless Steel, it delivers high mechanical durability and long-term corrosion protection, making it ideal for medical instrumentation, server enclosures, and telecommunications housings.
Self-Clinching Integration: Mounts permanently under standard pressing tools, eliminating loose secondary hardware, tapping, or the heat stress of welding.
Closed-Bottom Blind Pocket: Guarantees an unbroken, flat exterior panel surface while keeping the internal thread chamber tightly sealed from outside debris or airflow.
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.
300 Series Stainless Steel: Engineered from premium stainless steel to ensure high structural strength and superior defense against rust and corrosion.
Product Specs
- SKU:
- BSOS-6440-15
- Part Number:
- BSOS-6440-15
- Brand:
- PEM® (PennEngineering®)
- Product Category:
- Blind Threaded Standoffs – Types BSO, BSOA, BSOS – Unified
- Thread Size:
- .112-40 (#4-40)
- Thread Code:
- 6440
- Length Code:
- 15
- Length (L) (+.002 in / –.005 in):
- 0.469 in
- Material Code:
- S
- Fastener Material:
- 300 Series Stainless Steel
- Standard Finish:
- Passivated and/or Tested Per ASTM A380
- Thread Specification:
- Internal, ANSI B1.1, 2B
- Minimum Sheet Thickness:
- 0.040 in
- Hole Size in Sheet (+.003 in / -.000 in):
- 0.213 in
- C (+.000 in / -.005 in):
- 0.212 in
- H Nom. (Hex Size):
- 0.250 in
- Minimum Distance from Hole C/L to Edge:
- 0.31 in
- For Use in Sheet Hardness:
- HRB 70 / HB 125 or Less
