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PennEngineering
All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Fasteners for Mounting into Printed Circuit Boards > Nuts and Spacers/Standoffs, Surface Mount – Types SMTSO, SMTSOB, SMTSS™, SMTSK™, SMTBSO™ > SMTSS™ REELFAST® Surface Mount SNAP-TOP® Standoffs - Unified > Part # SMTSSS-156-8 ET  
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Part # SMTSSS-156-8 ET, SMTSS™ REELFAST® Surface Mount SNAP-TOP® Standoffs - Unified


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.
    •




     Specifications   

    L - Length ± .005

     View
    .250 in

    Min. Sheet Thickness
    		.060 in

    A Max.
    		.060 in

    C Max.
    		.161 in

    E ± .005
    		.250 in

    B ± .005
    		.188 in

    P ± .005
    		.141 in

    øH - Hole Size in Sheet + .003 - .000
    		.166 in

    øD - Min. Solder Pad
    		.276 in

    Parts per Reel1
    		280

    Fastener Material
    		Carbon Steel

    Standard Finish2
    		Electro-Plated Tin, ASTM B 545, Class A with Clear Preservative Coating, annealed

    Top Mounting Hole A + .003 -.000
    .156 in

    Bottom Mounting Hole B + .003 -.000
    		.166 in

    Min. Thickness - Panel 1 (Bottom)
    		.060 in

    Thickness Range - Panel 2 (Top)
    		.040 to .070 in

    Material - Panel 1 (Bottom)
    		PC Board

    Material - Panel 2 (Top)
    		PC Board or Metal

    Edge Distance C Min.
    		.100 in

    Location Tolerance
    		±.005 in

    Max. Hardness - Panel 1 (Bottom)
    		No Limit

    Max. Hardness - Panel 2 (Top)
    		No Limit

    CAD Supplier
    		PennEngineering® (PEM®)
    1 Packaged on 330mm recyclable reels. Tape width is 24 mm. Supplied with polyimide patch for vacuum pick up. Reels conform to EIA-481.
    2 (1) See PEM Technical Support section of our web site for related plating standards and specifications. (2) Optimal solderability life noted on packaging.