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Буквенное обозначение
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Страна
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Угол вершины профиля, °
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Описание (расшифровка буквенного обозначения)
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ISO
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60°
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International Organization for Standardization
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NC
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USA
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60°
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National Coarse
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UNC
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USA
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60°
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Unified National Coarse
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NF
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USA
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60°
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National Fine
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UNF
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USA
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60°
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Unified National Fine
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UNEF
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USA
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60°
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Unified National
Extra Fine
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UN
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USA
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60°
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Unified National 8-,
12- and 16 pitch series
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UNS
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USA
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60°
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Special Threads of
American National Form
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NPT
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USA
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60°
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National Taper Pipe 1:16
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NPTF
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USA
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60°
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National Taper Pipe
Dryseal 1:16
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NPS
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USA
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60°
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National Standard
Straight Pipe
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NPSM
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USA
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60°
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National Standard Straight
Pipe for free fitting mechanical
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NPSF
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USA
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60°
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National Standard Internal
Straight Pipe Dryseal
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BSW
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GB
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55°
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British Standard
Withworth Coarse
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BSF
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GB
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55°
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British Standard Fine
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BSP
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GB
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55°
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British Strandard Pipe
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BSPT
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GB
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55°
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British Standard Pipe Taper
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BA
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GB
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47°
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British Standard Association
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