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DIN 939 Double End Stud

DIN 939 Double End Studs are short cylindrical bars less than about 200 mm long. They are partially and unequally threaded—they consist of a short threaded section, referred to as the tap end, an unthreaded shoulder and a long threaded section, which is the nut end. DIN 939 features an "interference fit" at the tap end; thread tolerance is Sk6 (internal mating thread tolerance is specified as 6H). Right-hand threads are standard. Available in Class 8.8 and 10.8 steel, zinc plated and plain finish (plain finish can rust). The length of the tap end is about 1.25 times the stud diameter (denoted as ~1.25d); stud length is the combined length of the unthreaded shoulder and threaded nut end—not overall length. For a "normal thread" non-interference fit, select DIN 939 Fo.

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Code Product Qty. Package Qty. Carton  
STB636-606 M6-1.0 x 16 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Plated
STA636-610 M6-1.0 x 20 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA664-610 M8-1.25 x 20 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STB664-610 M8-1.25 x 20 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Plated
STC664-610 M8-1.25 x 20 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Yellow Plated
STB664-615 M8-1.25 x 25 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Plated
STB664-620 M8-1.25 x 30 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Plated
STA664-625 M8-1.25 x 35 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STB664-625 M8-1.25 x 35 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Plated
STA664-630 M8-1.25 x 40 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA664-635 M8-1.25 x 45 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA664-640 M8-1.25 x 50 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STB664-640 M8-1.25 x 50 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Plated
STA664-650 M8-1.25 x 60 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA664-655 M8-1.25 x 65 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA664-670 M8-1.25 x 80 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA664-680 M8-1.25 x 90 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA664-690 M8-1.25 x 100 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA664-705 M8-1.25 x 175 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STB664-705 M8-1.25 x 175 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Plated
STB694-610 M10-1.5 x 20 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Plated
STA694-615 M10-1.5 x 25 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA694-620 M10-1.5 x 30 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STA694-625 M10-1.5 x 35 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Plain Finish (no rust protection)
STB694-625 M10-1.5 x 35 mm Double End Stud (Tap End ~1.25d Long) DIN 939, Interference Fit, Class 8.8, Zinc Plated

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