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Board Spacers, Standoffs

Image Part Number Description / PDF Quantity Rfq
1896

1896

Keystone Electronics Corp.

HEX STANDOFF #4-40 ALUMINUM 7/8"

19275000
1612-3

1612-3

Keystone Electronics Corp.

ROUND STANDOFF #6-32 BRASS 3/16"

400012800
25506

25506

Keystone Electronics Corp.

HEX STANDOFF M3 NYLON 25MM

9159600
1548C

1548C

Keystone Electronics Corp.

ROUND STANDOFF #6-32 BRASS 1/2"

4833000
7667

7667

Keystone Electronics Corp.

ROUND STANDOFF #8-32 CERAMIC 1"

3068689
4898

4898

Keystone Electronics Corp.

SURFACE MOUNT #6 SPACER .250

282
5059-3

5059-3

Keystone Electronics Corp.

ROUND SPACER #6 BRASS 1/8"

2500
24884

24884

Keystone Electronics Corp.

SM STANDOFF ON T&R 6MM

9251300
5058-3

5058-3

Keystone Electronics Corp.

ROUND SPACER #4 BRASS 1/8"

700
24886

24886

Keystone Electronics Corp.

SM STANDOFF WITH T&R 10MM

90353900
4897

4897

Keystone Electronics Corp.

SURFACE MOUNT #6 SPACER .125

3175
4933

4933

Keystone Electronics Corp.

HEX STANDOFF #8-32 NYLON 3/8"

18643600
4949

4949

Keystone Electronics Corp.

6-32 SMT THREADED INSERT

26664500
24885

24885

Keystone Electronics Corp.

SM STANDOFF ON T&R 8MM

4597
1623-4

1623-4

Keystone Electronics Corp.

ROUND STANDOFF #4-40 BRASS 1/2"

15003400
NC111082A

NC111082A

Keystone Electronics Corp.

ROUND SPACER #2 ALUMINUM 3/16"

0
NC111132A

NC111132A

Keystone Electronics Corp.

ROUND SPACER #2 ALUMINUM 1/2"

0
NC111092A

NC111092A

Keystone Electronics Corp.

ROUND SPACER #2 ALUMINUM 1/4"

0
NC111072A

NC111072A

Keystone Electronics Corp.

ROUND SPACER #2 ALUMINUM 1/8"

0
469

469

Keystone Electronics Corp.

RND STNDFF #10-32 PHENOLIC 1/2"

0

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

TypeFunctional FeaturesApplication Examples
Cylindrical SpacersSimple tubular design with uniform diameterPCB layer separation in consumer electronics
Hexagonal Standoffs6-sided structure for wrench tighteningIndustrial equipment panel mounting
Self-clinching StandoffsPermanent installation with threaded compressionSheet metal enclosures in servers
Adjustable SpacersVariable length through threaded adjustmentPrototype development and testing
Insulated SpacersNon-conductive materials for electrical isolationHigh-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

ParameterImportance
Material Hardness (HV)Determines wear resistance and load capacity
Thread Engagement LengthAffects 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 RatingPrevents 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

ManufacturerRepresentative Product
PEMS-8900 Series self-clinching standoffs
RS Components486-8826 insulated hexagonal spacers
Mouser Electronics925206-12 adjustable PCB spacers
McMaster-Carr91285A102 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
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