Πρότυπο UNF (Unified Fine thread).
Διαθέσιμες διαστάσεις: 3/16″x32tpi, 1/4″x28tpi, 5/16″x24tpi, 3/8″x24tpi, 7/16″x20tpi, 1/2″x20tpi, 9/16″x18tpi, 5/8″x18tpi, 3/4″x16tpi, 7/8″x14tpi, 1″x12tpi και 1″x14tpi.

Διαθέσιμα μοντέλα

Μέγεθος	Εξωτερική διάμετρος	Τρύπημα
3/16″x32tpi	Ø38mm	Ø4,00mm
1/4″x28tpi		Ø5,50mm
5/16″x24tpi		Ø6,90mm
3/8″x18tpi		Ø8,50mm.
3/8″x20tpi		Ø8,00mm.
3/8″x24tpi		Ø8,50mm
3/8″x32tpi		Ø8,00mm.
7/16″x20tpi		Ø9,90mm
1/2″x16tpi		Ø10,75mm.
1/2″x20tpi		Ø11,50mm
1/2″x22tpi		Ø10,75mm.
9/16″x16tpi		Ø12,20mm.
9/16″x18tpi		Ø12,90mm
5/8″x18tpi		Ø14,50mm
3/4″x16tpi		Ø17,50mm
7/8″x14tpi	Ø50mm	Ø20,25mm
1″x12tpi		Ø23,25mm
1″x14tpi		Ø23,50mm