Board Spacers, Standoffs

Part Number	Description / PDF	Quantity
13RS150050 Richco, Inc. (Essentra Components)	ROUND SPACER, 1.020 ID, 1.500 OD	1000
13RS062560 Richco, Inc. (Essentra Components)	ROUND SPACER, .281 ID, .615 OD,	2000
13SP089 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	21370
13SP194 Richco, Inc. (Essentra Components)	ROUND SPACER, .140 ID, .375 OD,	4000
CBMFTS270A Richco, Inc. (Essentra Components)	HEX STANDOFF M3 NYLON 15MM	6492
15TSP006 Richco, Inc. (Essentra Components)	ROUND STANDOFF, #6-32 THREAD, .2	1972
15TSP032 Richco, Inc. (Essentra Components)	ROUND STANDOFF, 1/4-20 THREAD, .	1975
HTSN-M3-10-6-2 Richco, Inc. (Essentra Components)	HEX STANDOFF M3 NYLON 10MM	924
14HTSP113 Richco, Inc. (Essentra Components)	HEX THREADED STANDOFF, #2-56 THR	1475
13RSSR0132 Richco, Inc. (Essentra Components)	ROUND SPACER, .380 ID, .500 OD,	500
NS-03-03 Richco, Inc. (Essentra Components)	NON THREADED SPACER - PLASTIC,NS	1874
14HTSP116 Richco, Inc. (Essentra Components)	HEX THREADED STANDOFF, #4-40 THR	957
13RS162592 Richco, Inc. (Essentra Components)	ROUND SPACER, .250 ID, 1.062 OD,	1000
CBMFTS340A Richco, Inc. (Essentra Components)	HEX STANDOFF M3 NYLON 33MM	277
13SP112 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	10000
SS3/8-4 Richco, Inc. (Essentra Components)	ROUND SPACER M9 PVC 1/2"	1436
13RS075083 Richco, Inc. (Essentra Components)	ROUND SPACER, .386 ID, .754 OD,	2500
13RS087542 Richco, Inc. (Essentra Components)	ROUND SPACER, .265 ID, .875 OD,	5000
36440MF087 Richco, Inc. (Essentra Components)	MALE FEMALE THREADED STANDOFF, #	1920
R938-2 Richco, Inc. (Essentra Components)	ROUND SPACER NYLON 1/8"	4361

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