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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	SMTSSS-4MM-6 ET SMTSS™ REELFAST® Surface Mount SNAP-TOP® Standoffs - Metric Add To Cart Request Quote	SMTSSS-4MM-8 ET SMTSS™ REELFAST® Surface Mount SNAP-TOP® Standoffs - Metric Add To Cart Request Quote	SMTSSS-4MM-10 ET SMTSS™ REELFAST® Surface Mount SNAP-TOP® Standoffs - Metric Add To Cart Request Quote
L - Length ± 0.13¹	N/A 6 mm	N/A 8 mm	N/A 10 mm
Min. Sheet Thickness	N/A 1.53 mm
A Max.	N/A 1.53 mm
C Max.	N/A 4.09 mm
E ± 0.13	N/A 6.35 mm
B ± 0.13	N/A 4.8 mm
P ± 0.13	N/A 3.58 mm
oH - Hole Size in Sheet +0.08	N/A 4.22 mm
oD - Min. Solder Pad	N/A 7 mm
Parts per Reel²	N/A 300	N/A 250	N/A 200
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 +0.08	N/A 4 mm
Bottom Mounting Hole B +0.08	N/A 4.22 mm
Min. Thickness - Panel 1 (Bottom)	N/A 1.53 mm
Thickness Range - Panel 2 (Top)	N/A 1 to 1.8 mm
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 2.54 mm
Location Tolerance	N/A ±0.13 mm
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}	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.

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