PennEngineering - SELF-CLINCHING KEYHOLE® FASTENERS - SKC-R™ - Unified

PEM® KEYHOLE® Standoffs and sheet joining fasteners are designed so that a PC board or panel can be quickly slipped into place and then removed from an assembly by simply sliding the board sideways and lifting it off. These standoffs and fasteners can save valuable time and dramatically reduce the amount of loose hardware required.

Type SKS-R™ fasteners are designed so that two sheets can be quickly joined flat against each other. Typically, several fasteners are used with one standard PEM® threaded F™ flush nut which accepts a screw to secure the sheets against any unwanted movement.

Allow detachable spacing of two sheets
Clinch feature mounts fastener permanently and flush or sub-flush into metal sheet
Unique barrel design allows for quick “panel-on-panel” attachment and detachment
Can be clinched into blind hole where concealed head is required
Makes horizontal or vertical component mounting possible
SKS-R™ fasteners are designed to provide high side-load in verticle component mounting applications
SKS-R™ fasteners are available for various top sheet thicknesses and hole sizes

Panel to Panel, KEYHOLE® Style – Type SKS-R

Unit of Measure

Items	SKC-R1.5-2.5 SELF-CLINCHING KEYHOLE® FASTENERS - SKC-R™ - Unified	SKC-R1.5-3.2 SELF-CLINCHING KEYHOLE® FASTENERS - SKC-R™ - Unified	SKC-R1.5-4.0 SELF-CLINCHING KEYHOLE® FASTENERS - SKC-R™ - Unified	SKC-R2.0-2.5 SELF-CLINCHING KEYHOLE® FASTENERS - SKC-R™ - Unified	SKC-R2.0-3.2 SELF-CLINCHING KEYHOLE® FASTENERS - SKC-R™ - Unified
Panel 1 (Bottom) Thickness Range	N/A .040 to .047 in
Panel 1 (Bottom) Mounting Hole B + .003 - .000	N/A .237 in	N/A .277 in	N/A .316 in	N/A .237 in	N/A .277 in
Panel 2 (Top) Sheet Thickness Max.	N/A .060 in	N/A .060 in	N/A .060 in	N/A .080 in	N/A .080 in
Panel 2 (Top) Mounting Hole A1 Nom.	N/A .059 in	N/A .073 in	N/A .089 in	N/A .059 in	N/A .073 in
Panel 2 (Top) Mounting Hole A2 ± .003	N/A .118 in	N/A .146 in	N/A .177 in	N/A .118 in	N/A .146 in
Panel 2 (Top) Mounting Hole A3 ± .003	N/A .197 in	N/A .236 in	N/A .276 in	N/A .197 in	N/A .236 in
Panel 2 (Top) Mounting Hole A4 Min.	N/A .148 in	N/A .181 in	N/A .217 in	N/A .148 in	N/A .181 in
Panel 1 (Bottom) Sheet Hardness Max.¹	N/A HRB 70 / HB 125
Panel 2 (Top) Material	N/A Any
A Max.	N/A .039 in
B ± .003	N/A .177 in	N/A .217 in	N/A .256 in	N/A .177 in	N/A .217 in
C Max.	N/A .236 in	N/A .276 in	N/A .315 in	N/A .236 in	N/A .276 in
D Anvil Hole + .003 - .000	N/A .183 in	N/A .222 in	N/A .262 in	N/A .183 in	N/A .222 in
H Nom.	N/A .276 in	N/A .315 in	N/A .354 in	N/A .276 in	N/A .315 in
M Max.	N/A .156 in	N/A .156 in	N/A .156 in	N/A .175 in	N/A .175 in
N ± .003	N/A .099 in	N/A .126 in	N/A .157 in	N/A .099 in	N/A .126 in
S ± .003	N/A .107 in	N/A .107 in	N/A .107 in	N/A .127 in	N/A .127 in
Panel 1 (Bottom) Edge Distance C1 Min.	N/A .276 in	N/A .295 in	N/A .315 in	N/A .276 in	N/A .295 in
Panel 1 (Bottom) Location Tolerance Max.	N/A ±.005 in
Panel 2 (Top) Edge Distance C2 Min.	N/A .160 in	N/A .201 in	N/A .240 in	N/A .160 in	N/A .201 in
Standard Material	N/A 300 Series Stainless Steel
Standard Finish²	N/A Passivated and/or Tested Per ASTM A380
CAD Supplier	N/A PennEngineering® (PEM®)
¹ HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell. ² See PEM Technical Support section of our web site for related plating standards and specifications.