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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.
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Nuts and spacers/standoffs, surface mount – SMTSO

ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Unified
Nuts and spacers/standoffs, surface mount – SMTSO

ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Unified
Nuts and spacers/standoffs, surface mount – SMTSO

ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Unified
Nuts and spacers/standoffs, surface mount – SMTSO

ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Unified
Nuts and spacers/standoffs, surface mount – SMTSO

ReelFast® Brass Surface Mount Nuts and Spacers/Standoffs - Type SMTSOB – Unified
Thread Size N/A .086-56 (#2-56) N/A .086-56 (#2-56) N/A .086-56 (#2-56) N/A .086-56 (#2-56) N/A .112-40 (#4-40)
Thru-Hole + .004-.003 N/A
Thread Code N/A 256 N/A 256 N/A 256 N/A 256 N/A 440
Thru-Hole Code N/A
Length Code N/A 2 N/A 4 N/A 8 N/A 12 N/A 2
L - Length ± .0051
N/A .062 in ReelFast--Surface-Mount-Standoffs---Type-SMTSOB-2_1.JPG N/A .125 in ReelFast--Surface-Mount-Standoffs---Type-SMTSOB-2_1.JPG N/A .250 in ReelFast--Surface-Mount-Standoffs---Type-SMTSOB-2_1.JPG N/A .375 in ReelFast--Surface-Mount-Standoffs---Type-SMTSOB-2_1.JPG N/A .062 in ReelFast--Surface-Mount-Standoffs---Type-SMTSOB-2_1.JPG
Min. Sheet Thickness N/A .060 in
A Max. N/A .060 in
C Max. N/A .142 in N/A .142 in N/A .142 in N/A .142 in N/A .161 in
E ± .005 N/A .219 in
øH - Hole Size in Sheet + .003 - .000 N/A .147 in N/A .147 in N/A .147 in N/A .147 in N/A .166 in
øD - Min. Solder Pad N/A .244 in
Parts per Reel N/A 1500 N/A 1000 N/A 650 N/A 300 N/A 1500
Pitch N/A 12 mm N/A 12 mm N/A 12 mm N/A 16 mm N/A 12 mm
For Use In N/A P.C. Board
Thread Specification N/A Internal, ASME B1.1, 2B
Fastener Material N/A Brass
Standard Finish2 N/A Electro-Plated Tin, ASTM B 545, Class A with Clear Preservative Coating, annealed
CAD Supplier N/A PennEngineering® (PEM®)
Inventory N/A {0} N/A {0} 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 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 mig