THREADED SPACERS & SUPPORT PILLARS (SPA SERIES)
Threaded spacers & support pillars are components used to maintain precise separation between panels or assemblies while providing threaded interfaces for fasteners. PSM’s SPA series offers spacers and pillars that accept standard nuts or machine screws, combining spacing, alignment, insulation, and structural support into one part. They are especially useful where electrical insulation, reusable threads, or higher temperature performance is required.
PRODUCT INDEX
PRODUCT INDEX
PSM’s SPA product range includes several variants tailored for different mechanical and electrical needs:
| SPA Type | Description / Use Case |
|---|---|
| SPA 01 / 02 / 03 (Hexagonal Spacers) | Metal or plated brass/stainless steel spacers with hex finish for torqueing with a wrench. Reusable threads and good temperature performance. |
| SPA 04 / 05 / 06 (Round Acetal Spacers) | Made of acetal (POM) plastic, these spacers are lightweight, electrically insulating, yet structurally stable. |
| SPA 07 / 08 / 09 (High-Strength Insulating Spacers) | Plastic spacers with embedded brass inserts or studs to combine insulation with robust load capacity. |
| SPA 10 (Round Plain Hole Spacers) | Through-hole spacers (no internal threads) for mounting where only separation is needed, not fastening. |
These variants allow engineers to select based on weight, insulation requirements, mechanical strength, and environment.
Design & Application Guidelines
Load and length balance — Use the shortest spacer that meets clearance to reduce bending stress.
Wall thickness and thread depth — Maintain sufficient wall thickness to avoid thread stripping; deeper threads help in longer spacers.
Interference and fit tolerances — If using interference or press fits, limit interference length to reduce stress transfer to plastic or mating parts.
Thermal and material compatibility — For plastic spacers, ensure the materials handle the operating temperature and thermal expansion.
Electrical insulation — Use acetal or insulating types in electronic or high-voltage assemblies to avoid current leakage.
Reusable threads — Metal or insert-equipped spacers are better for applications needing disassembly and reassembly.
Fastener alignment and clearance — Allow chamfers, lead-ins, or countersinks to guide screws properly into threaded portions of spacers.
Applications & Benefits
Threaded spacers and support pillars are widely used in electronics, enclosures, machinery, panels, and structural assemblies. Their benefits include:
Consistent and precise component spacing
Simplified assembly by integrating spacing and threading
Electrical isolation where required
Ability to reuse threaded connections without damaging substrates
Reduced need for separate standoffs, nuts, or washers