Product Description
The PEM® BSOS-3.5M3-18 is a high-performance blind threaded standoff engineered for creating precise gaps between components and thin sheet metal. Leveraging a proven self-clinching design, this fastener installs permanently into properly sized round holes with a simple squeeze, embedding seamlessly into the chassis without welding or adhesives. Its blind-threaded (closed) construction ensures that the outer panel surfaces remain entirely flush and unmarred for a smooth aesthetic, while protecting internal threads from external contamination or debris. Built from durable 300 Series Stainless Steel, it provides superior corrosion resistance, making it an excellent choice for medical devices, data communication housings, aerospace equipment, and sensitive electronics enclosures.
Self-Clinching Technology: Mounts permanently with a standard squeezing force, ensuring exceptional torque-out and pushout resistance without damaging the chassis.
Blind-Hole Design: Features a closed end that keeps the opposite side of the thin sheet metal flush and tightly sealed against debris.
Rugged Stainless Steel Construction: Manufactured from 300 Series Stainless Steel to deliver long-lasting corrosion protection in demanding environments.
Accurate Structural Spacing: Specifically dimensioned to provide a reliable 18 mm stacking clearance or alignment gap for circuit boards and internal sub-assemblies.
Product Specs
- SKU:
- BSOS-3.5M3-18
- Part Number:
- BSOS-3.5M3-18
- Brand:
- PEM® (PennEngineering®)
- Product Category:
- Blind Threaded Standoffs – Types BSO, BSOA, BSOS – Metric
- Thread Size x Pitch:
- M3 x 0.5
- Thread Code:
- 3.5M3
- Length Code:
- 18
- Length (L):
- 18 mm (+0.05 mm / -0.13 mm)
- Material Code:
- S
- Fastener Material:
- 300 Series Stainless Steel
- Standard Finish:
- Passivated and/or Tested Per ASTM A380
- Thread Specification:
- Internal, ANSI/ASME B1.13M, 6H
- Minimum Sheet Thickness:
- 1.00 mm
- Hole Size in Sheet (+0.08 mm):
- 5.41 mm
- C (-0.13 mm):
- 5.39 mm
- F Min. (Thread Depth):
- 9.50 mm
- H Nom. (Hex Size):
- 6.4 mm
- Minimum Distance from Hole C/L to Edge:
- 6.80 mm
- For Use in Sheet Hardness:
- HRB 70 / HB 125 or Less
