Board Spacers, Standoffs

Part Number	Description / PDF	Quantity
13SP113 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	7990
13RS044087 Richco, Inc. (Essentra Components)	ROUND SPACER, .220 ID, .438 OD,	500
13SP365 Richco, Inc. (Essentra Components)	ROUND SPACER, .171 ID, .313 OD,	2000
13RS062585 Richco, Inc. (Essentra Components)	ROUND SPACER, .250 ID, .625 OD,	1500
R901-8 Richco, Inc. (Essentra Components)	ROUND SPACER NYLON 1/2"	2842
13RS213579 Richco, Inc. (Essentra Components)	ROUND SPACER, 1.422 ID, 2.125 OD	250
13RS075038 Richco, Inc. (Essentra Components)	ROUND SPACER, .375 ID, .750 OD,	1000
13RS020030 Richco, Inc. (Essentra Components)	ROUND SPACER, .145 ID, .200 OD,	8324
13RS213581 Richco, Inc. (Essentra Components)	ROUND SPACER, 1.630 ID, 2.130 OD	250
13RS062575 Richco, Inc. (Essentra Components)	ROUND SPACER, .500 ID, .625 OD,	3000
13SPRT121 Richco, Inc. (Essentra Components)	ROUND SPACER, RETAINING, #4 SCRE	2000
13ME109 Richco, Inc. (Essentra Components)	ROUND SPACER, 10.4MM ID, 22MM OD	2000
13RSSR0230 Richco, Inc. (Essentra Components)	ROUND SPACER, .630 ID, 1.000 OD,	1990
14HTSP001 Richco, Inc. (Essentra Components)	HEX THREADED STANDOFF, #4-40 THR	9825
R903-1 Richco, Inc. (Essentra Components)	ROUND SPACER NYLON 1/16"	975
35HSP124 Richco, Inc. (Essentra Components)	HEX SELF THREAD STANDOFF, #4 SCR	1000
TN6-32-832-1 Richco, Inc. (Essentra Components)	ROUND STANDOFF #8-32 NYLON 2"	465
13RSSR0349 Richco, Inc. (Essentra Components)	ROUND SPACER, .630 ID, 1.000 OD,	250
13RS037513 Richco, Inc. (Essentra Components)	ROUND SPACER, .194 ID, .375 OD,	2000
13RS056337 Richco, Inc. (Essentra Components)	ROUND SPACER, .281 ID, .563 OD,	1950

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