RS PRO

Self-Retaining Spacers

Self retaining spacers are used to insulate the heads of screws on a PCB (printed circuit board), while providing the desired spacing between the chassis and the PCB.

How do self retaining spacers work?

Self retaining spacers are similar to round spacers or hex spacers, but with special inside diameters that are designed to grip the screw's outside shank. They have snap-in mounting mechanisms that ensure the required space is maintained even when a screw is removed.

The snap-in standoff snaps into the PCB so that it’s locked in position. Self retaining spacers are designed to raise stacked sections, reduce physical contact between two components and create enough space for heat dissipation. Self retaining spacers are available in several spacing heights to suit different applications.

What are self retaining spacers used for?

Self retaining spacers are used in applications that require precise control of product lengths and dimensions. Some typical applications include:

  • PCBs
  • Cable assemblies
  • Telecommunication equipment
  • Computer enclosures
  • Electronic automotive assemblies
  • LED positioning
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Part Details Brand Stock Body Height Fixing Screw Size Chassis Hole Diameter PCB Hole Diameter Material
SRS-4-4-01, 6.4mm High Nylon Self-Retaining Spacer with 4.7mm PCB Hole and 3mm Chassis Hole for M3 Screw Richco 2840 6.4mm M3 3mm 4.7mm Nylon
SRS-4-3-01, 4.8mm High Nylon Self-Retaining Spacer with 4.7mm PCB Hole and 3mm Chassis Hole for M3 Screw Richco 2400 4.8mm M3 3mm 4.7mm Nylon
4979874005335, 3.2mm High Nylon Self-Retaining Spacer with 4.7mm PCB Hole and 3mm Chassis Hole for M3 Screw Richco 1840 3.2mm M3 3mm 4.7mm Nylon
SRS-4-6-01, 9.5mm High Nylon Self-Retaining Spacer with 4.7mm PCB Hole and 3mm Chassis Hole for M3 Screw Richco 1080 9.5mm M3 3mm 4.7mm Nylon
SRS-6-4-01, 6.4mm High Nylon Self-Retaining Spacer with 5.9mm PCB Hole and 3.5mm Chassis Hole for M3.5 Screw Richco 960 6.4mm M3.5 3.5mm 5.9mm Nylon
SRS-4-5-01, 7.9mm High Nylon Self-Retaining Spacer with 4.7mm PCB Hole and 3mm Chassis Hole for M3 Screw Richco 880 7.9mm M3 3mm 4.7mm Nylon
SRS-4-7-01, 11.1mm High Nylon Self-Retaining Spacer with 4.7mm PCB Hole and 3mm Chassis Hole for M3 Screw Richco 440 11.1mm M3 3mm 4.7mm Nylon
SRS-6-10-01, 15.9mm High Nylon Self-Retaining Spacer with 5.9mm PCB Hole and 3.5mm Chassis Hole for M3.5 Screw Richco 240 15.9mm M3.5 3.5mm 5.9mm Nylon
SRS-6-5-01, 7.9mm High Nylon Self-Retaining Spacer with 5.9mm PCB Hole and 3.5mm Chassis Hole for M3.5 Screw Richco 200 7.9mm M3.5 3.5mm 5.9mm Nylon
SRS-6-6-01, 9.5mm High Nylon Self-Retaining Spacer with 5.9mm PCB Hole and 3.5mm Chassis Hole for M3.5 Screw Richco 40 9.5mm M3.5 3.5mm 5.9mm Nylon
M2.5X12, 12.7mm High Nylon Self-Retaining Spacer with 5.9mm PCB Hole and 3.5mm Chassis Hole for M3.5 Screw Richco 0 12.7mm M3.5 3.5mm 5.9mm Nylon
SRS-1-190, 4.8mm High PVC Self-Retaining Spacer with 2.7mm PCB Hole and 3.6mm Chassis Hole for #4 Screw Bivar 0 4.8mm #4 3.6mm 2.7mm PVC
SRS-1-3MM, 3mm High PVC Self-Retaining Spacer with 2.7mm PCB Hole and 3.6mm Chassis Hole for #4 Screw Bivar 0 3mm #4 3.6mm 2.7mm PVC
SRS-2-145, 3.7mm High PVC Self-Retaining Spacer with 3.1mm PCB Hole and 4.4mm Chassis Hole for #6 Screw Bivar 0 3.7mm #6 4.4mm 3.1mm PVC
SRS-4-160, PVC Self-Retaining Spacer with 2.9mm PCB Hole and 3.7mm Chassis Hole for M3 Screw Bivar 0 - M3 3.7mm 2.9mm PVC
SRS-4-205, 5.2mm High PVC Self-Retaining Spacer with 2.9mm PCB Hole and 3.7mm Chassis Hole for M3 Screw Bivar 0 5.2mm M3 3.7mm 2.9mm PVC
SRS-4-410, 10.4mm High PVC Self-Retaining Spacer with 2.9mm PCB Hole and 3.7mm Chassis Hole for M3 Screw Bivar 0 10.4mm M3 3.7mm 2.9mm PVC
SRS-4-5MM, 5mm High PVC Self-Retaining Spacer with 2.9mm PCB Hole and 3.7mm Chassis Hole for M3 Screw Bivar 0 5mm M3 3.7mm 2.9mm PVC
SRS-4-8-01, 12.7mm High Nylon Self-Retaining Spacer with 4.7mm PCB Hole and 3mm Chassis Hole for M3 Screw Richco 0 12.7mm M3 3mm 4.7mm Nylon
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