Πρότυπο UNF (Unified Fine thread).
Διαθέσιμα σε ³/₁₆″x32tpi, ¹/₄″x28tpi, ⁵/₁₆″x24tpi, ⁵/₁₆″x32tpi, ³/₈″x18tpi, ³/₈″x20tpi, ³/₈″x22tpi, ³/₈″x24tpi, ³/₈″x32tpi, ⁷/₁₆″x20tpi, ¹/₂″x16tpi, ¹/₂″x20tpi, ¹/₂″x22tpi, ⁹/₁₆″x16tpi, ⁹/₁₆″x18tpi, ⁵/₈″x16tpi, ⁵/₈″x18tpi, ³/₄″x16tpi, ⁷/₈″x14tpi, 1″x12tpi, 1″x14tpi, 1⅛x12tpi, 1¼″x12tpi και 1½″x12tpi.

Διαθέσιμα μοντέλα

Μέγεθος	Τρύπημα
3/16″x32tpi	Ø4,00mm
1/4″x28tpi	Ø5,50mm
5/16″x24tpi	Ø6,90mm
5/16″x32tpi	Ø6,90mm
3/8″x18tpi	Ø8,50mm.
3/8″x20tpi	Ø8,00mm.
3/8″x22tpi	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″x16tpi	Ø14,50mm
5/8″x18tpi	Ø14,50mm
3/4″x16tpi	Ø17,50mm
7/8″x14tpi	Ø20,25mm
1″x12tpi	Ø23,25mm
1″x14tpi	Ø23,50mm
1⅛″x12tpi	Ø26,50mm
1¼″x12tpi	Ø29,50mm
1½″x12tpi	Ø34,70mm