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PEM® surface mounted standoffs that eliminate the need for attaching screws

  • PEM® SMTSS™ fasteners feature a spring action to hold a P.C. Board securely without screw or threaded hardware, allowing for quick assembly.
  • Mount on P.C. Boards in the same manner and at the same time as other surface mount components prior to the automated reflow solder process.
  • Alleviated concerns about potential damage to P.C. Boards due to improper secondary installation operations.
  • Fasteners provided on tape and reel compatible with existing SMT automated installation equipment.
  • Benefits include reduced scrap, reduced handling and reduced risk of board damage.
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    Unit of Measure
    Items
    TYPE SMTSS

    SMTSS™ REELFAST® Surface Mount SNAP-TOP® Standoffs - Unified
    TYPE SMTSS

    SMTSS™ REELFAST® Surface Mount SNAP-TOP® Standoffs - Unified
    L - Length ± .0051
    		N/A .250 in TYPE-SMTSSS-2.jpg N/A .375 in TYPE-SMTSSS-2.jpg
    Min. Sheet Thickness N/A .060 in
    A Max. N/A .060 in
    C Max. N/A .161 in
    E ± .005 N/A .250 in
    B ± .005 N/A .188 in
    P ± .005 N/A .141 in
    øH - Hole Size in Sheet + .003 - .000 N/A .166 in
    øD - Min. Solder Pad N/A .276 in
    Parts per Reel2 N/A 280 N/A 220
    Fastener Material N/A Carbon Steel
    Standard Finish3 N/A Electro-Plated Tin, ASTM B 545, Class A with Clear Preservative Coating, annealed
    Top Mounting Hole A + .003 -.000 N/A .156 in TYPE-SMTSSS-Application.jpg
    Bottom Mounting Hole B + .003 -.000 N/A .166 in
    Min. Thickness - Panel 1 (Bottom) N/A .060 in
    Thickness Range - Panel 2 (Top) N/A .040 to .070 in
    Material - Panel 1 (Bottom) N/A PC Board
    Material - Panel 2 (Top) N/A PC Board or Metal
    Edge Distance C Min.4 N/A .100 in
    Location Tolerance N/A ±.005 in
    Max. Hardness - Panel 1 (Bottom) N/A No Limit
    Max. Hardness - Panel 2 (Top) N/A No Limit
    CAD Supplier N/A PennEngineering® (PEM®)
    Inventory N/A {0} N/A {0}
    • 1 The “L” dimension is the height of the installed stud at max grip. The height of the stud will increase if it is installed into thinner material. To calculate “actual L” use this formula: max grip - actual grip + L = “actual L”
    • 2 Packaged on 330mm recyclable reels. Tape width is 24 mm. Supplied with polyimide patch for vacuum pick up. Reels conform to EIA-481.
    • 3 (1) See PEM Technical Support section of our web site for related plating standards and specifications. (2) Optimal solderability life noted on packaging.
    • 4 To minimize sheet distortion and maximize product performance, use a centerline-to-edge value greater or equal to the value specified.