Board Spacers, Standoffs

Part Number	Description / PDF	Quantity
13RS020313 Richco, Inc. (Essentra Components)	ROUND SPACER, .130 ID, .203 OD,	5990
13RS075055 Richco, Inc. (Essentra Components)	ROUND SPACER, .360 ID, .735 OD,	500
13RS050092 Richco, Inc. (Essentra Components)	ROUND SPACER, .440 ID, .500 OD,	500
13RS075082 Richco, Inc. (Essentra Components)	ROUND SPACER, .203 ID, .750 OD,	2000
HS-6-5 Richco, Inc. (Essentra Components)	HEX SPACER #6 CPVC 5/8"	1984
13RS125384 Richco, Inc. (Essentra Components)	ROUND SPACER, .384 ID, 1.250 OD,	250
15TSP010 Richco, Inc. (Essentra Components)	ROUND STANDOFF, #6-32 THREAD, 1.	9862
13RSSR0156 Richco, Inc. (Essentra Components)	ROUND SPACER, .252 ID, .625 OD,	1715
13RS091776 Richco, Inc. (Essentra Components)	ROUND SPACER, .838 ID, .918 OD,	500
13RSSR0054 Richco, Inc. (Essentra Components)	ROUND SPACER, .192 ID, .312 OD,	1000
13RSSR0251 Richco, Inc. (Essentra Components)	ROUND SPACER, .755 ID, 1.500 OD,	500
005459659914 Richco, Inc. (Essentra Components)	ROUND SPACER #10 POLYSTYRENE 8MM	4462
13RS025022 Richco, Inc. (Essentra Components)	ROUND SPACER, .132 ID, .252 OD,	2834
15TSP155 Richco, Inc. (Essentra Components)	ROUND STANDOFF, #6-32 THREAD, 1.	999
13SP184 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	10000
13RS100018 Richco, Inc. (Essentra Components)	ROUND SPACER, .250 ID, 1.000 OD,	2000
13RSSR0170 Richco, Inc. (Essentra Components)	ROUND SPACER, .250 ID, .625 OD,	1490
13RSSR0025 Richco, Inc. (Essentra Components)	ROUND SPACER, .115 ID, .250 OD,	2000
005371259914 Richco, Inc. (Essentra Components)	ROUND SPACER #4 POLYSTYRENE 2MM	2704
13RS018716 Richco, Inc. (Essentra Components)	ROUND SPACER, .064 ID, .187 OD,	2000

Board Spacers, Standoffs

1. Overview

Board spacers and standoffs are specialized hardware components used to create controlled spacing between printed circuit boards (PCBs), panels, or structural elements. They provide mechanical support, electrical isolation, and thermal management in electronic assemblies. Their importance in modern technology includes enabling compact designs, reducing vibration stress, and improving heat dissipation in devices ranging from smartphones to industrial control systems.

2. Main Types & Functional Classification

Type	Functional Features	Application Examples
Cylindrical Spacers	Simple tubular design with uniform diameter	PCB layer separation in consumer electronics
Hexagonal Standoffs	6-sided structure for wrench tightening	Industrial equipment panel mounting
Self-clinching Standoffs	Permanent installation with threaded compression	Sheet metal enclosures in servers
Adjustable Spacers	Variable length through threaded adjustment	Prototype development and testing
Insulated Spacers	Non-conductive materials for electrical isolation	High-voltage power supply assemblies

3. Structure & Composition

Typical construction includes:

Material: Stainless steel (corrosion resistance), aluminum (lightweight), or nylon (insulation)
Geometry: Cylindrical (standard), stepped (for multiple board heights), or flanged (for load distribution)
Installation Features: Internal threading (male/female), knurled surfaces (for grip), or press-fit tabs
Surface Treatment: Passivation (metal), UV resistance (plastics), or EMI shielding coating

4. Key Technical Specifications

Parameter	Importance
Material Hardness (HV)	Determines wear resistance and load capacity
Thread Engagement Length	Affects vibration resistance in dynamic environments
Thermal Conductivity (W/m K)	Critical for heat dissipation in power electronics
Dielectric Strength (kV/mm)	Safety factor in high-voltage applications
Installation Torque Rating	Prevents over-tightening damage to PCBs

5. Application Fields

Primary industries include:

Electronics Manufacturing: Server racks, LED displays
Automotive: Engine control units (ECUs), ADAS systems
Aerospace: Satellite PCB mounting, avionics enclosures
Medical Devices: MRI scanner internal structures
Consumer Electronics: Smartphone PCB stacking

6. Leading Manufacturers & Products

Manufacturer	Representative Product
PEM	S-8900 Series self-clinching standoffs
RS Components	486-8826 insulated hexagonal spacers
Mouser Electronics	925206-12 adjustable PCB spacers
McMaster-Carr	91285A102 stainless steel standoffs

7. Selection Recommendations

Evaluate mechanical load requirements vs material strength
Match thread type (UNC/UNF/Metric) with assembly hardware
Consider CTE (Coefficient of Thermal Expansion) compatibility with PCB materials
Select insulated variants for >50V circuits
Use vibration-damping coatings in mobile applications

8. Industry Trends

Emerging developments include:

Miniaturization: Sub-1mm spacers for wearable devices
Material Innovation: Conductive polymer composites for EMI shielding
Smart Integration: Standoffs with embedded strain gauges for structural monitoring
Automated Installation: Self-aligning designs for robotic assembly lines
Sustainability: Biodegradable plastic options (PLA-based) entering mainstream production