Product Description
The BSO-3.5M3-20ZI is a blind-threaded standoff engineered with a proven self-clinching design for permanent installation in thin metal sheets. These fasteners are designed to be installed with a simple squeeze in properly sized round holes, becoming an integral part of the chassis or panel. Because the threads are blind (closed-end), the outer sheet surfaces remain flush and sealed, providing both a clean aesthetic and protection for internal components. This specific model is manufactured from heat-treated carbon steel and features a zinc-plated finish for enhanced durability and corrosion resistance in demanding assembly environments.
Self-Clinching Design: Installs permanently into thin sheets using any standard press.
Blind Threading: Keeps the reverse side of the panel flush and closed to prevent the entry of debris or moisture.
High Pushout/Torque Resistance: Provides high-strength permanent threads in sheets as thin as 1.00 mm.
Flush Finish: Ensures a smooth, unmarred outer appearance on the mounting surface.
Heat-Treated Durability: Carbon steel construction ensures reliable performance in "harder" thin metal applications.
Product Specs
- SKU:
- BSO-3.5M3-20ZI
- Part Number:
- BSO-3.5M3-20ZI
- Thread Size x Pitch:
- M3 x 0.5
- Thread Code:
- 3.5M3
- Length Code:
- 20
- Length (L):
- 20 mm (+0.05 mm / –0.13 mm)
- Material:
- Heat-Treated Carbon Steel
- Finish:
- Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless
- Thread Specification:
- Internal, ANSI/ASME B1.13M, 6H
- Hole Size in Sheet:
- 5.41 mm (+ 0.08 mm)
- Minimum Sheet Thickness:
- 1.00 mm
- Max. Sheet Hardness:
- HRB 80 / HB 150 or less
- Min. Dist. Hole C/L to Edge:
- 6.80 mm
- Dimension H (Nominal):
- 6.4 mm
