Board Spacers, Standoffs

Part Number	Description / PDF	Quantity
13RSSR0022 Richco, Inc. (Essentra Components)	ROUND SPACER, .140 ID, .250 OD,	2000
13SP224 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	6250
13RSSR0200 Richco, Inc. (Essentra Components)	ROUND SPACER, .380 ID, .625 OD,	500
MSW1170A Richco, Inc. (Essentra Components)	ROUND SPACER M6 NYLON 1/16"	0
36M35MF010 Richco, Inc. (Essentra Components)	MALE FEMALE THREADED STANDOFF, M	913
13RSSR0229 Richco, Inc. (Essentra Components)	ROUND SPACER, .505 ID, 1.000 OD,	2000
005375800014 Richco, Inc. (Essentra Components)	ROUND SPACER #4 POLYSTYRENE 25MM	0
13SP073 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	24825
36440MF200 Richco, Inc. (Essentra Components)	MALE FEMALE THREADED STANDOFF, #	1918
13RS027541 Richco, Inc. (Essentra Components)	ROUND SPACER, .185 ID, .275 OD,	3865
13SP203 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	5000
SS10-12 Richco, Inc. (Essentra Components)	ROUND SPACER #10 PVC 1-1/2"	4490
R901-5 Richco, Inc. (Essentra Components)	ROUND SPACER NYLON 5/16"	4429
14HTSP220 Richco, Inc. (Essentra Components)	HEX THREADED STANDOFF, #6-32 THR	1959
13RS075053 Richco, Inc. (Essentra Components)	ROUND SPACER, .437 ID, .750 OD,	0
13SP193 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	3000
13RSSR0321 Richco, Inc. (Essentra Components)	ROUND SPACER, .255 ID, .625 OD,	1000
35MHSP015 Richco, Inc. (Essentra Components)	HEX SELF THREAD STANDOFF, M4 SCR	970
13RS125312 Richco, Inc. (Essentra Components)	ROUND SPACER, .510 ID, 1.250 OD,	1000
14HTSP041 Richco, Inc. (Essentra Components)	HEX THREADED STANDOFF, #8-32 THR	1000

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