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Type SMTSOB™ ReelFast® brass fasteners are ideal for applications which demand superior electrical/mechanical attachment points. 

These fasteners mount on PC boards in the same manner and at the same time as other surface mount components prior to the automated reflow solder process. The fasteners simply become another board component. This alleviates concerns about potential damage to PC boards due to improper secondary installation operations. The fasteners are provided on tape and reel compatible with existing SMT automated installation equipment. The benefits of using ReelFast® SMT fasteners are: faster assembly; reduced scrap; reduced handling; and reduced risk of board damage.

Packaged on 330 mm recyclable reels. Tape width is 24 mm. Supplied with polyimide patch for vacuum pick up. Reels conform to EIA-481.
Nuts and spacers/standoffs, surface mount – SMTSO
Unit of Measure
Items Nuts and spacers/standoffs, surface mount – SMTSO
SMTSOB-M2-2ET
ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Metric
Nuts and spacers/standoffs, surface mount – SMTSO
SMTSOB-M2-3ET
ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Metric
Nuts and spacers/standoffs, surface mount – SMTSO
SMTSOB-M2-4ET
ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Metric
Nuts and spacers/standoffs, surface mount – SMTSO
SMTSOB-M2-6ET
ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Metric
Nuts and spacers/standoffs, surface mount – SMTSO
SMTSOB-M2-8ET
ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Metric
Thread Size x Pitch N/A M2 x 0.4
Thru-Hole + 0.10-0.08 N/A
Thread Code N/A M2
Thru-Hole Code N/A
Length Code N/A 2 N/A 3 N/A 4 N/A 6 N/A 8
L - Length ± 0.13 N/A 2 mm a1309.jpg N/A 3 mm a1309.jpg N/A 4 mm a1309.jpg N/A 6 mm a1309.jpg N/A 8 mm a1309.jpg
Min. Sheet Thickness N/A 1.53 mm
A Max. N/A 1.53 mm
C Max. N/A 3.6 mm
E ± 0.13 N/A 5.56 mm
øH - Hole Size in Sheet + 0.08 N/A 3.73 mm
øD - Min. Solder Pad N/A 6.2 mm
Parts per Reel N/A 1500 N/A 1000 N/A 900 N/A 650 N/A 375
Pitch N/A 12 mm N/A 12 mm N/A 12 mm N/A 12 mm N/A 16 mm
For Use In N/A P.C. Board
Thread Specification N/A Internal, ASME B1.13M, 6H
Fastener Material N/A Brass
Standard Finish1 N/A Electro-Plated Tin, ASTM B 545, Class A with Clear Preservative Coating, annealed
CAD Supplier N/A PennEngineering® (PEM®)
  • 1 The tin deposit on type SMTSOB meets the requirements of ASTM B545, Class A and although the copper and nickel barrier layers used under the tin do not strictly comply with ASTM B545 thickness requirements they have proven effective at preventing zinc migration and providing the specified solderable shelf life.