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Dixon Fire 2012
US: 877.712.6179 Canada: 800.786.9697
Technical Information
Q
Technical
Thread Chart
National
Standard
NH*
Straight
Iron Pipe
NPSH
New York
Corporation
NYCT
Pacific Coast
PCT
New York
Fire Dept.
NYFT
Chemical
Hose
CHT *
NH
Underwriter's
Play Pipe
PPS
Garden
Hose
GHT *
Chicago Fire
Dept.
(NEW) *
Chicago Hose
Size ODM TPI
ODM TPI
ODM TPI
ODM TPI
ODM TPI
ODM TPI
ODM TPI
ODM TPI
ODM TPI
ODM TPI
¾"
1"
1¼"
1½"
2"
2½"
3"
3½"
4"
4½"
5"
6"
1.375
1.375
1.6718
1.990
2.5156
3.0686
3.6239
4.2439
5.0109
5.7609
6.260
7.025
8
8
9
9
8
7½
6
6
4
4
4
4
1.0353 *
1.2951 *
1.6399 *
1.8788 *
2.3528 *
2.841 *
3.470
3.970
4.470
4.970
5.530
6.590
14
11½
11½
11½
11½
8
8
8
8
8
8
8
--
--
--
2.093
2.547
3.000
--
--
--
--
--
--
--
--
--
11
11
8
--
--
--
--
--
--
1.0625
1.3125
1.860
2.100
2.550
3.035
--
--
5.000
--
--
--
11
11½
11
11
10
7½
--
--
4
--
--
--
--
1.660
--
2.100
--
3.030
3.630
4.070
4.610
5.800
--
--
--
8
--
8
--
8
8
8
8
4
--
--
1.375
1.370
--
--
--
--
--
--
--
--
--
--
8
8
--
--
--
--
--
--
--
--
--
--
--
--
--
2.1875
--
--
--
--
--
--
--
--
--
--
--
12
--
--
--
--
--
--
--
--
1.0625
1.0625
--
--
--
--
--
--
--
--
--
--
11½
11½
--
--
--
--
--
--
--
--
--
--
--
--
--
1.933
--
2.990
--
--
--
--
--
--
--
--
--
11½
--
7½
--
--
--
--
--
--
1.081
1.2951
1.705
1.946
2.522
3.043
--
--
--
--
--
--
11½
11½
11½
11½
8
7
--
--
--
--
--
--
* National Form Thread. Abbreviation for tapered iron pipe thread is TIPT or NPT (National Pipe Tapered).
ODM = Outside Diameter of Male
"Regional
Designation" Common Thread Name
"Dixon
Thread
Suffix"
Region Normally Used
2-1/2" ODM
(Outside diameter of male)
2-1/2" TPI
(threads per inch)
AMA & BCT*
Alberta Mutual Aid/
British Columbia Thread
B
British Columbia & Alberta
3.00
8
CSA
Canadian Standard
Association
C
Ontario
3.125
5
NS1
Nova Scotia 1
NS
Nova Scotia
3.23
5
QST & QMT Quebec Standard Thread
Q
Quebec
3.031
7
WCT Western Canada Thread
W
Saskatchewan & Manitoba
3.25
6
GHT
Garden Hose Thread
G
North America
NPS
National Pipe Straight
S
North America
NPT
National Pipe Tapered
T
North America
NST (NH)
National Standard
Thread
F
Most of USA
NYC New York Corporation
NYC
Newark, NJ
NYFD
New York Fire
Department
NYFD
New York Fire Department
*B Threads are designed to connect with both BCT and AMA fittings.
(Listed are the more popular thread types, other threads types are available, please contact Dixon for more information)
Regional Fire Thread Legend