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  • Uniform knurl diameter reduces the risk of sink marks.
  • Available in varying lengths for injection molding assemblies.
  • Aluminum inserts ideal for light weight designs.
  • Aluminum and stainless steel inserts offer lead-free alternative.
Knurled spacers – STKB, STKC
Molded-in Threaded Inserts, Thru-Threaded, Knurled 2
Unit of Measure
Items Knurled spacers – STKB, STKC
STKA-M3-10
Molded-in Threaded Inserts, Thru-Threaded, Knurled - Metric
Knurled spacers – STKB, STKC
STKA-M3-12
Molded-in Threaded Inserts, Thru-Threaded, Knurled - Metric
Knurled spacers – STKB, STKC
STKA-M3-15
Molded-in Threaded Inserts, Thru-Threaded, Knurled - Metric
Knurled spacers – STKB, STKC
STKA-M3-18
Molded-in Threaded Inserts, Thru-Threaded, Knurled - Metric
Knurled spacers – STKB, STKC
STKA-M3-3
Molded-in Threaded Inserts, Thru-Threaded, Knurled - Metric
Thread Size N/A M3 x 0.5
Type N/A STKA
Thread Code1 N/A M3
Length Code N/A 10 N/A 12 N/A 15 N/A 18 N/A 3
L - Length ± 0.13 N/A 10 mm a1293.jpg N/A 12 mm a1293.jpg N/A 15 mm a1293.jpg N/A 18 mm a1293.jpg N/A 3 mm a1293.jpg
E Nom. N/A 4.74 mm
Minor Dia.Min. N/A 2.47 mm
Minor Dia.Max. N/A 2.59 mm
Thread Specification N/A 6H per ASME B1.13M
Standard Material N/A Aluminum
Standard Finish N/A Plain
CAD Supplier N/A PennEngineering® (SI®)
  • 1 Thread tapped thru, Class 3A/4h screw must pass with finger torque, but basic go gauge may stop at last thread.