Product Description
The BSO4-440-12 is a self-clinching blind threaded standoff specifically engineered for permanent installation into stainless steel sheets as thin as .040”. Manufactured from specialty heat-treated 400 Series Stainless Steel, this fastener is capable of clinching into sheets with a hardness up to HRB 88 on the Rockwell B scale. The blind-thread (closed-end) design is a vital feature, ensuring that the outer sheet surface remains flush and closed, providing a smooth, unmarred appearance while effectively sealing the assembly against the ingress of environmental contaminants. It is an ideal solution for spacing components in high-performance or corrosive environments where stainless steel chassis are utilized.
Stainless Steel Compatibility: Specifically designed to clinch into 300 Series stainless steel sheets, which are often too hard for standard steel standoffs.
Environmental Protection: The closed-end (blind) design prevents dust, moisture, or debris from entering the enclosure through the fastener.
Permanent Attachment: The self-clinching action creates a permanent, high-strength bond with the host panel, resisting pushout and torque-out.
Flush Interior/Exterior: Maintains a clean, smooth finish on the reverse side of the sheet for aesthetic and aerodynamic requirements.
Unified Precision: Provides a reliable 3/8" standoff height for consistent component clearance and spacing.
Product Specs
- SKU:
- BSO4-440-12
- Part Number:
- BSO4-440-12
- Thread Size:
- .112-40 (#4-40)
- Thread Code:
- 440
- Length Code:
- 12
- Length (L):
- .375 in (3/8")
- Material:
- Heat-Treated 400 Series Stainless Steel
- Finish:
- Passivated per ASTM A380
- Hole Size in Sheet:
- .166 in
- Minimum Sheet Thickness:
- .040 in
- Maximum Sheet Hardness:
- HRB 88 / HB 183
- Minimum Distance from Hole Centerline to Edge:
- .23 in
- Internal Thread Specification:
- Unified Class 2B MIL-S-7742
