Board Spacers, Standoffs

Part Number	Description / PDF	Quantity
13RS012505 Richco, Inc. (Essentra Components)	ROUND SPACER, .067 ID, .125 OD,	4967
13RSSR0066 Richco, Inc. (Essentra Components)	ROUND SPACER, .166 ID, .375 OD,	1000
13RS100022 Richco, Inc. (Essentra Components)	ROUND SPACER, .375 ID, 1.000 OD,	2450
35HSP010 Richco, Inc. (Essentra Components)	HEX SELF THREAD STANDOFF, #6 SCR	1990
13RS100013 Richco, Inc. (Essentra Components)	ROUND SPACER, .344 ID, .990 OD,	1000
13ME003 Richco, Inc. (Essentra Components)	ROUND SPACER, 2.6MM ID, 4MM OD,	2420
13SP014 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	18216
13ME091 Richco, Inc. (Essentra Components)	ROUND SPACER, 8.3MM ID, 12MM OD,	1978
13RS081227 Richco, Inc. (Essentra Components)	ROUND SPACER, .718 ID, .805 OD,	500
14HTSP012 Richco, Inc. (Essentra Components)	HEX THREADED STANDOFF, #8-32 THR	2000
13RS050055 Richco, Inc. (Essentra Components)	ROUND SPACER, .383 ID, .500 OD,	4998
13RS040637 Richco, Inc. (Essentra Components)	ROUND SPACER, .265 ID, .406 OD,	3980
36440MF075 Richco, Inc. (Essentra Components)	MALE FEMALE THREADED STANDOFF, #	721
13SP304 Richco, Inc. (Essentra Components)	ROUND SPACER, .115 ID, .250 OD,	1000
13RS062541 Richco, Inc. (Essentra Components)	ROUND SPACER, .312 ID, .625 OD,	4990
13RS063050 Richco, Inc. (Essentra Components)	ROUND SPACER, .378 ID, .630 OD,	5000
13SP357 Richco, Inc. (Essentra Components)	ROUND SPACER, .171 ID, .313 OD,	2000
HTS4-6-48 Richco, Inc. (Essentra Components)	HEX STANDOFF #4-40 NYLON 3/8"	32
13SP037 Richco, Inc. (Essentra Components)	ROUND THROUGH SPACER, NATURAL, N	4088
R911-6 Richco, Inc. (Essentra Components)	ROUND SPACER NYLON 3/8"	4440

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