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Technical

Identifying Fittings

IDF/ISO Couplings

TUBE ØA ØA TUBE
O.D. O.D.

Liners Males
Tube OD ØA Tube OD ØA
(inches) (inches)
1 1.33 1 1.46
1½ 1.85 1½ 1.99
2 2.38 2 2.53
2½ 2.91 2½ 3.06
3 3.44 3 3.59
4 4.75 4 4.96

IDF Hex Nuts

A Nut
Tube OD ØA B Threads
(inches) Thread ID Across fats per inch
1 1.81 1.35 8
1½ 2.36 1.88 8
B 2 2.95 2.42 8
2½ 3.54 2.95 8
3 4.13 3.48 8
4 5.24 4.81 6

IDF Thread Form
(same as Acme thread form)

29°

I.D.
29°
O.D.

male thread female thread

Gaskets

BS4825 ISO

Dixon Sanitary 2014 800.789.1718 295 Z