Swage Spacers

Lyn-Tron's Comprehensive Buyer's Guide to All Things Swage Spacers

Swage Spacers and Standoffs are used to separate, position or connect components in an assembly. The swage end adds a permanent installation option, keeping the standoff fixed to the board. Originally designed for spacing and stacking circuit boards, swage spacers and swage standoffs are now available in a variety of materials, platings, threads, and length combinations for a wider range of applications. Threads are compatible with other standard, off-the-shelf hardware, with custom threads available upon request. Common customization options include unique threads, custom lengths, and non-standard thread depths. Other changes are often easily incorporated into production.


Standard Swage Spacer

Swage Spacers and Standoffs were developed to ease the installation process and avoid damage from lost parts. As circuit boards increased the number of components being used, assembly times continued to rise. Having a standoff be able to be permanently attached to the boards, allowed for the installation to happen when it was convenient, but also prevented the standoff from being lost. Eliminating the risk of a part being lost made these the first choice for any application where loose parts posed serious threats. 

Selection Guide

When designing or selecting a Swage Spacer or Standoff for your next application, first decide on the spacer or standoff, and then use the below guide in finding the right swage size to have included.  The below guide will help you find the right swage size from the different options available.

Swage Spacers

The Inner Diameters (ID) on a swage spacer are unthreaded and designed so a male thread can pass through without interference. This type of fit is called a clearance fit and why the ID can also be referred to as a “Clearance Hole”.

Swage Standoffs

Swage Standoffs are readily available in all common threads, in both inch and metric sizing. Swage Standoffs come with female threads on both ends of the part, with the Swage Shank being unthreaded. This allows for a screw or male standoff to be installed into either side. In shorter lengths, the thread will go through the entire part. Longer length standoffs are threaded to a minimum thread depth on each end. 

  • Step 1 - Swage Length
  • As the swage end will be pressed onto the board, the proper swage length is critical to obtain the desired fit. Different lengths are provided for all off the common circuit board thicknesses.

Panel Thickness (inch) Lyn-Tron Code Shank Length (±.003)
1/64" AA 0.037"
1/32" A 0.075"
1/16" B 0.105"
3/32" C 0.135"
1/8" D 0.165"
3/16" E 0.230"
1/4" F 0.290"
1/32" H 0.062"
1/16" I 0.094"
3/32" J 0.125"
1/8" K 0.156"
3/16" L 0.219"
1/4" M 0.281"
Panel Thickness (mm) Lyn-Tron Code Shank Length (±.008)
0.8mm A 1.9mm
1.6mm B 2.7mm
2.4mm C 3.4mm
3.2mm D 4.2mm
4.8mm E 5.8mm
6.4mm F 7.4mm
  • Step 2 - Swage Diameter
    • As the swage end will be pressed onto the board, the proper swage length is critical to obtain the desired fit. Different lengths are provided for all off the common circuit board thicknesses.

  • Step 3 - Inner Diameter (ID)
  • The Inside Diameter available will always be equal to, or slightly larger than your Spacer’s Clearance Hole or Swage Standoff’s Thread Size. This will allow for screw to pass through the spacer and the swage section without interference.

Screw Size Lyn-Tron ID Code Clearance Hole Range (Inch)
#0 00 0.062"-0.072"
#2 02 0.088"-0.098"
#4 04 0.114"-0.124"
#6 06 0.140"-0.150"
#8 08 0.166"-0.176"
#10 10 0.192"-0.202"
#12 12 0.218"-0.228"
1/4" 25 0.252"-0.262"
5/16" 31 0.315"-0.325"
3/8" 38 0.377"-0.387"
Screw Size Lyn-Tron ID Code Clearance Hole Range (Metric)
M1.6 16 1.67mm-1.93mm
M2 20 2.07mm-2.33mm
M2.5 25 2.57mm-2.83mm
M3 30 3.07mm-3.33mm
M3.5 35 3.57mm-3.83mm
M4 40 4.07mm-4.33mm
M5 50 5.17mm-5.43mm
M6 60 6.17mm-6.43mm
M8 80 8.37mm-8.63mm
  • Step 4 - Outer Diameter (OD)
    • A swage spacer or standoff will be a thru-hole component of the circuit board. The drill size you use to create the hole in the circuit board will correspond to a similar sized swage outside diameter. This will create a clearance fit, but once swaged your standoff will be held firmly in place. Some twisting should be expected under heavy torq, but super-torq standoff’s should be chose to minimize this further.

Outside Diameter Tolerance
Inch 1/8" (0.125") - 3/8" (0.375") ±.005
Metric 4.5mm - 10mm ±.13
  • Step 5 - Material & Plating Options
    • When deciding on a material and plating/finish, there are many properties that can be considered. The most common ones include Corrosion and Rust Resistance, Magnetism, Electrical Conductivity, Strength to Weight Properties, Color, and Cost. Review the chart below to see which standard material has the right properties for your application’s environment.  For an explanation of RoHS, Conflict Minerals, WEEE and REACH visit our Technical section.

Materials Corrosion Resistance Magnetic Electrical Conductor Strength to Weight Color Plates
Stainless Steel High Slightly Yes - Poor Above Average Grey Available
Steel Low Strongly Yes - Poor Average Grey Available
Aluminum Average No Yes - Average Very Above Average Grey Available
Brass High No Yes - Below Average Average Yellow Available
Nylon High No No Average White and can be dyed to other colors No
Installation Instructions
  1. Insert body of the Swage Spacer or Standoff into the Anvil.
  2. Install the Swage Shank through the previously drilled hole in the circuit board.
  3. Using an Arbor Press or other similar tool, put the Punch onto the Swage Shank.
  4. Push down on the Swage Shank until it rolls over onto the board.
More Questions?
  • Lyn-Tron has been the leading manufacturer of Electronic Hardware for over 50 years! We offer a full line of standard Electronic Hardware, but will manufacture custom sizes and OEM designed hardware to your print. Contact us today with any requests for Electronic Hardware or custom parts manufacturing.