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For Castings and Soft Metals HRB 70 / HB 125 or less

PEM® 300 Series Stainless Steel CASTSERT™ inserts provide strong, durable metal threads in soft metals and die-cast alloys. The simple press-in and rapid installation process for these inserts uses a flat punch and anvil to install all sizes and lengths, approximately 80% faster than other methods.


  • Designed for flush installation with flat punch and anvil into blind holes or thru-holes
  • Process cost savings vs. coil inserts or thread tapping
  • Installed into drilled holes or as-cast holes with low draft angle
  • Pilot for rapid seating and self-alignment
  • Symmetric for auto-feed capability

  • Fastener drawings and models are available at www.pemnet.com

    PEM CASTSERT Press-in Inserts
    Unit of Measure
    Items PEM CASTSERT Press-in Inserts
    CKS-256-1
    PEM® CASTSERT™ Press-in Inserts - Unified
    PEM CASTSERT Press-in Inserts
    CKS-256-2
    PEM® CASTSERT™ Press-in Inserts - Unified
    PEM CASTSERT Press-in Inserts
    CKS-440-1
    PEM® CASTSERT™ Press-in Inserts - Unified
    PEM CASTSERT Press-in Inserts
    CKS-440-2
    PEM® CASTSERT™ Press-in Inserts - Unified
    PEM CASTSERT Press-in Inserts
    CKS-632-1
    PEM® CASTSERT™ Press-in Inserts - Unified
    Thread Size N/A .086-56 (#2-56) N/A .086-56 (#2-56) N/A .112-40 (#4-40) N/A .112-40 (#4-40) N/A .138-32 (#6-32)
    Type N/A CKS
    Thread Code N/A 256 N/A 256 N/A 440 N/A 440 N/A 632
    Length A ±.005 N/A .125 in PEM-CASTSERT-Press-in-Inserts_DIM.jpg N/A .250 in PEM-CASTSERT-Press-in-Inserts_DIM.jpg N/A .175 in PEM-CASTSERT-Press-in-Inserts_DIM.jpg N/A .300 in PEM-CASTSERT-Press-in-Inserts_DIM.jpg N/A .200 in PEM-CASTSERT-Press-in-Inserts_DIM.jpg
    Pilot C Max. N/A .179 in N/A .179 in N/A .209 in N/A .209 in N/A .240 in
    After Knurl E (Nom.) N/A .196 in N/A .196 in N/A .228 in N/A .228 in N/A .259 in
    Min. Sheet Thickness R N/A .130 in N/A .255 in N/A .180 in N/A .305 in N/A .205 in
    Hole Size in Sheet + .003 - .000 N/A .188 in N/A .188 in N/A .219 in N/A .219 in N/A .250 in
    Min. Depth Full Thread H1 N/A .180 in N/A .180 in N/A .210 in N/A .210 in N/A .241 in
    Min. Dist. Hole C/L to Edge N/A .151 in N/A .151 in N/A .175 in N/A .175 in N/A .198 in
    Standard Material N/A 300 Series Stainless Steel
    Standard Finish N/A Passivated and/or tested per ASTM A360
    CAD Supplier N/A PennEngineering® PEM®
    • 1 Draft hole performance will vary greatly depending on length of engagement of the knurl over the installed length. For best results, recommend use of 3 degree or less total draft and design hole as close to H as possible at depth R to optimize length and depth of knurl engagement.