Dairy coupling DIN 11851

A pipe coupling for foods and chemistry according to DIN 11851, colloquially also called "Dairy Thread". It consists of a special clutch thread, the metric round thread according to DIN 405, which has coarse, rounded thread edges and is thus easy to clean. These pipe couplings are commonly used in the food industry.
The flank angle is 30°.

Nominal
Diameter
Thread Size Nominal
Diameter
mm
Bolt Thread
Minor Diameter
mm
Nut Thread
Minor Diameter
mm
Pitch
mm
TPI
DN 10 Rd 28 x 1/8" 28.318 24.825 25.142 3.175 8
DN 15 Rd 34 x 1/8" 34.318 30.825 31.142 3.175 8
DN 20 Rd 44 x 1/6" 44.423 39.767 40.190 4.233 6
DN 25 Rd 52 x 1/6" 52.423 47.767 48.100 4.233 6
DN 32 Rd 58 x 1/6" 58.423 53.767 54.190 4.233 6
DN 40 Rd 65 x 1/6" 65.423 60.767 61.190 4.233 6
DN 50 Rd 78 x 1/6" 78.423 73.767 74.190 4.233 6
DN 65 Rd 95 x 1/6" 95.423 90.767 91.190 4.233 6
DN 80 Rd 110 x 1/4" 110.635 103.650 104.285 6.350 4
DN 90 Rd 120 x 1/4" 120.635 113.650 114.285 6.350 4
DN 100 Rd 130 x 1/4" 130.635 123.650 124.285 6.350 4
DN 125 Rd 160 x 1/4" 160.635 153.650 154.285 6.350 4
DN 150 Rd 190 x 1/4" 190.635 183.650 184.285 6.350 4