|
Mark |
Type |
Relate Size |
|
UNC / UNRC |
Unified Coarse Thread
Series |
ANSI B1.1 |
|
|
BS 1580 |
|
UNF / UNRF |
Unified Fine Thread
Series |
ANSI B1.1 |
|
|
BS 1580 |
|
UNEF / UNREF |
Unified Extra Fine Thread
Series |
ANSI B1.1 |
|
|
BS 1580 |
|
UNS / UNRS |
Unified Thread of Special |
ANSI B1.1 |
|
|
BS 1580 |
|
|
Diameters Pitches and
Lengths |
|
|
|
|
|
|
Engagement |
|
|
|
|
|
NEF |
American National Extra
Find |
ANSI B1.1 |
|
|
|
|
|
Thread Series |
|
|
|
|
|
NH/NST |
American National Hose
Coupling |
ANSI B2.4 |
|
|
|
|
|
and Firehose Couplings
Threads |
|
|
|
|
|
NPT |
American Standard Taper
Pipe |
ANSI B2.1 |
|
|
|
|
|
Threads for General |
|
|
|
|
|
NPSM |
American Standard Straight
Pipe |
ANSI B2.1 |
|
|
|
|
|
Threads for Free Fitting
Mechanical |
|
|
|
|
| |
Joints for fixture |
|
|
|
|
|
NPSH |
American Standard Straight
Pipe |
ANSI B2.1 |
|
|
|
|
|
Threads for Loose Fitting |
|
|
|
|
| |
Mechanical joints for
Hose |
|
|
|
|
| |
Couplings |
|
|
|
|
|
NPTF |
Dryseal American Standard
Taper |
ANSI B2.2 |
|
|
|
|
|
Pipe Threads |
|
|
|
|
|
M |
ISO Metric Threads |
|
JIS B 0205 |
ISO 261 |
BS 3643 |
|
S |
ISO Miniature Screw
Thread |
|
JIS B 0201 |
ISOR 1051 |
BS 4827 |
|
Tr |
Metric Taper Threads |
|
JIS B 0216 |
ISO 2902 |
BS 5346 |
|
Tw |
29 Deg. Taper Threads |
|
JIS B 0222 |
|
|
|
R |
Taper Male Threads for
pipes |
|
JIS B 0203 |
ISO 7/1 |
|
|
Rc |
Taper female Threads for
pipes |
|
JIS B 0203 |
ISO 7/1 |
|
|
Rp |
Parallel Female Threads to
"R" for pipes |
|
JIS B 0203 |
ISO 7/1 |
|
|
G |
Parallel Female Thread for
pipes in Machanical Connection |
|
JIS B 0202 |
|
|
|
PF |
Parallel Threads for
pipes |
|
JIS B 0202 |
ISO 228/1 |
|
|
PT |
Taper Threads for pipes |
|
JIS B 0203 |
|
|
|
PS |
Parallel Female Threads to
"R" for pipes |
|
JIS B 0203 |
|
|
|
BSW |
British Standard Whitworth
Threads |
|
|
|
BS 84 |
|
BSF |
British Standard Find
Thread |
|
|
|
BS 84 |
|
ACME |
Acme Thread General
Purpose |
|
|
|
BS
1104 |
