Product Description
The BSO-440-20ZI is a self-clinching blind threaded standoff engineered for permanent installation in thin metal sheets. By utilizing a proven self-clinching design, this fastener is installed by pressing it into a round hole using a standard squeeze action, which causes the sheet material to cold-flow into the pilot. The blind-thread feature is a vital attribute, ensuring that the outer sheet surface remains flush and closed, providing a clean, unmarred appearance while effectively sealing the assembly against environmental contaminants. Manufactured from heat-treated carbon steel with a zinc finish, it is ideal for applications requiring specific spacing and secure component mounting in metal chassis.
Closed-End Design: The blind thread prevents debris and moisture from entering and keeps the exterior panel surface unmarred.
Self-Clinching Action: Provides high pushout and torque-out resistance, ensuring the fastener stays secure under mechanical stress.
Flush Outer Surface: Maintains the aesthetic and functional integrity of the exterior side of the assembly.
Precision Spacing: Offers a reliable .625 in standoff height for consistent internal component clearance.
Hardened Construction: Heat-treated carbon steel ensures durable performance in sheets with hardness up to HRB 80.
Product Specs
- SKU:
- BSO-440-20ZI
- Part Number:
- BSO-440-20ZI
- Thread Size:
- .112-40 (#4-40)
- Thread Code:
- 440
- Length Code:
- 20
- Length (L):
- .625 in
- Material:
- Heat-Treated Carbon Steel
- Finish:
- Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless
- Hole Size in Sheet:
- .166 in
- Minimum Sheet Thickness:
- .040 in
- Maximum Sheet Hardness:
- HRB 80 / HB 150
- Minimum Distance from Hole Centerline to Edge:
- .27 in
- Internal Thread Specification:
- Unified Class 2B, ANSI B1.1
