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NATIONAL FITTINGS CANADA (NFC) At NFC, we supply high quality Aluminum Threaded Fittings shipping out of our warehouse the next day. We make it easy for you to purchase Aluminum... NATIONAL FITTINGS CANADA (NFC) At NFC, we supply high quality Aluminum Threaded Fittings shipping out of our warehouse the next day. We make it easy for you to purchase Aluminum... Read More
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NATIONAL FITTINGS CANADA (NFC)

At NFC, we supply high quality Aluminum Threaded Fittings shipping out of our warehouse the next day. We make it easy for you to purchase Aluminum Threaded Fittings in one location via our online store where we stock various types of fittings ranging from 1 ½” size to 6” in diameter.

 

USAGE

Fire Threaded Fittings are mainly used to connect to fire hydrants, fire hoses, reduce or increase thread sizes and convert from one thread type to another.

 

TERMINOLOGY

Fire Threaded Fittings can also be referred to as Double Females, Doubles Males, Reducers, Increasers, Caps and Plugs. On both the female and male ends, NFC supplies all threaded fittings with a higbee cut, which makes them thread much smoother and without the possibility of cross-threading. A higbee is also known as a quick start thread and indicates the start of the fire thread. The start of the higbee cut thread will also line up with the notch found on the outside of the rocker lug on fittings.

 

Forging is a manufacturing process involving the shaping of metal using localized compressive forces. The blows are delivered with a hammer (often a power hammer) or a die.

 

MATERIAL

Made from forged 6061-T6 lightweight aluminum alloy. NFC offers top quality Hard Black Anodized Threaded Fittings ranging from 1 ½” to 6”. The finished product is laser engraved with a clear understanding of the thread type and size produced. Swivel sizes ranging from 1 1⁄2” to 3” are attached using Stainless Steel ball bearings. Swivel sizes ranging from 4” to 6” are attached using aluminum roller bearings.

 

THREADS

NFC stocks all Canadian Provincial Fire Threads. Standard threads include BAT, WCT, CSA, QST, NSZ1, NH, NPSH.

 

STANDARD CANADIAN FIRE DEPARTMENT 2½" HOSE THREADS

SIZE

DESCRIPTION

ODM

TPI

2½"

AMA - Alberta Mutual Aid

2.990

8

2½"

BCT - British Columbia

3.000

8

2½"

BA (BAT) - Compatible with BCT & AMA

2.990

8

2½"

CSA - Canadian Standards Association - Ontario

3.125

5

2½"

QST - Province of Quebec Standard

3.031

7

2½"

Western Canada Fire Underwriters Association

3.250

6

2½"

Nova Scotia - Zone 1

3.234

5V*

2½"

Newfoundland -- (aka St. John's thread)

3.25

5V*

2½"

NST - American Standard Fire Hose -- USA

3.068

7.5

* It should be noted that most fire hose threads are blunt at the top -- but the 5V thread is cut to a sharp "V" point. To do this, the depth of the thread is 1/64th of an inch deeper than the conventional 5 threads-to-the-inch of the Canadian Standard Fire HoseThread.

 

 

COMMONLY USED THREADS

 

National
Standard
Thread
NH/NST 

Straight
Iron Pipe

NPSH/IPT

Standard
Pipe
Thread
NPT/TIPT

British
Standard
Pipe Thread
BSP

Size

ODM

TPI

ODM

TPI

ODM

TPI

ODM

TPI

¾"

1.375

8

1.035

14

1.050

14

1.041

14

1"

1.375

8

1.295

11.5

1.315

11.5

1.309

11

1½"

1.990

9

1.878

11.5

1.900

11.5

1.882

11

2"

2.515

8

2.352

11.5

2.375

11.5

2.347

11

2½"

3.068

7.5

2.841

8

2.875

8

2.960

11

3"

3.623

6

3.470

8

3.500

8

3.460

11

3½"

4.243

6

3.970

8

4.000

8

4.125

11

4"

5.010

4

4.470

8

4.500

8

4.450

11

4½"

5.760

4

4.970

8

5.000

8

5.125

11

5"

6.260

4

 

 

5.563

8

5.450

11

6"

7.025

4

 

 

6.625

8

6.450

11

 Note:
 Residential garden hose fittings are ¾" GHT with 1.0625" ODM x 11½ TPI

 

INSTRUCTIONS FOR MEASURING THREADS

If a thread gauge and caliper are not available, and a sample cannot be sent, the following method can be used to obtain the correct outside diameter and pitch of the thread needed.

 

 

  • Cut a strip of paper about 1"(25mm) wide, long enough to wrap tightly around the circumference of the male thread and overlap at the ends.
  • With a pin, pierce through both layers of the paper (fig.1).
  • Press your thumb firmly against the thread hard enough to make a thread impression on the strip (fig. 2).
  • Remove the strip and circle the pin holes on the strip with a pencil (fig. 3).
  • Divide the distance between the pin holes by 3.1416. The result is the ODM (outside diameter of the male).

It is important that both the ODM and threads per inch (pitch) of the male part are given when ordering. Always include the paper strip with your correspondence. If not specified, "V" sharp thread will be furnished.

GASKETS

High quality swivel gaskets are lathe cut ozone free EPDM.

DESCRIPTION OF THREADED FITTINGS BY SERIES

N35 Series – Female Swivel Rocker Lug x Female Swivel - Rocker Lug.
N36 Series – Male Provincial Thread x Male Provincial Thread - Rocker Lug.
N37 Series – Female Rigid Provincial Thread x Male Provincial Thread - Rocker Lug.
N53 Series – Female Swivel Rocker Lug x Female Rigid Rocker Lug.
N56 Series – Female Rigid Long Handle x Male Provincial Thread.
N57 Series – Female Swivel Long Handle x Female Swivel Long Handle.
CAP Series – Female Threaded Cap with Chain.
PLUG Series – Male Threaded Plug with Chain.

NATIONAL FITTINGS CANADA (NFC)

At NFC, we supply high quality Aluminum Threaded Fittings shipping out of our warehouse the next day. We make it easy for you to purchase Aluminum Threaded Fittings in one location via our online store where we stock various types of fittings ranging from 1 ½” size to 6” in diameter.

 

USAGE

Fire Threaded Fittings are mainly used to connect to fire hydrants, fire hoses, reduce or increase thread sizes and convert from one thread type to another.

 

TERMINOLOGY

Fire Threaded Fittings can also be referred to as Double Females, Doubles Males, Reducers, Increasers, Caps and Plugs. On both the female and male ends, NFC supplies all threaded fittings with a higbee cut, which makes them thread much smoother and without the possibility of cross-threading. A higbee is also known as a quick start thread and indicates the start of the fire thread. The start of the higbee cut thread will also line up with the notch found on the outside of the rocker lug on fittings.

 

Forging is a manufacturing process involving the shaping of metal using localized compressive forces. The blows are delivered with a hammer (often a power hammer) or a die.

 

MATERIAL

Made from forged 6061-T6 lightweight aluminum alloy. NFC offers top quality Hard Black Anodized Threaded Fittings ranging from 1 ½” to 6”. The finished product is laser engraved with a clear understanding of the thread type and size produced. Swivel sizes ranging from 1 1⁄2” to 3” are attached using Stainless Steel ball bearings. Swivel sizes ranging from 4” to 6” are attached using aluminum roller bearings.

 

THREADS

NFC stocks all Canadian Provincial Fire Threads. Standard threads include BAT, WCT, CSA, QST, NSZ1, NH, NPSH.

 

STANDARD CANADIAN FIRE DEPARTMENT 2½" HOSE THREADS

SIZE

DESCRIPTION

ODM

TPI

2½"

AMA - Alberta Mutual Aid

2.990

8

2½"

BCT - British Columbia

3.000

8

2½"

BA (BAT) - Compatible with BCT & AMA

2.990

8

2½"

CSA - Canadian Standards Association - Ontario

3.125

5

2½"

QST - Province of Quebec Standard

3.031

7

2½"

Western Canada Fire Underwriters Association

3.250

6

2½"

Nova Scotia - Zone 1

3.234

5V*

2½"

Newfoundland -- (aka St. John's thread)

3.25

5V*

2½"

NST - American Standard Fire Hose -- USA

3.068

7.5

* It should be noted that most fire hose threads are blunt at the top -- but the 5V thread is cut to a sharp "V" point. To do this, the depth of the thread is 1/64th of an inch deeper than the conventional 5 threads-to-the-inch of the Canadian Standard Fire HoseThread.

 

 

COMMONLY USED THREADS

 

National
Standard
Thread
NH/NST 

Straight
Iron Pipe

NPSH/IPT

Standard
Pipe
Thread
NPT/TIPT

British
Standard
Pipe Thread
BSP

Size

ODM

TPI

ODM

TPI

ODM

TPI

ODM

TPI

¾"

1.375

8

1.035

14

1.050

14

1.041

14

1"

1.375

8

1.295

11.5

1.315

11.5

1.309

11

1½"

1.990

9

1.878

11.5

1.900

11.5

1.882

11

2"

2.515

8

2.352

11.5

2.375

11.5

2.347

11

2½"

3.068

7.5

2.841

8

2.875

8

2.960

11

3"

3.623

6

3.470

8

3.500

8

3.460

11

3½"

4.243

6

3.970

8

4.000

8

4.125

11

4"

5.010

4

4.470

8

4.500

8

4.450

11

4½"

5.760

4

4.970

8

5.000

8

5.125

11

5"

6.260

4

 

 

5.563

8

5.450

11

6"

7.025

4

 

 

6.625

8

6.450

11

 Note:
 Residential garden hose fittings are ¾" GHT with 1.0625" ODM x 11½ TPI

 

INSTRUCTIONS FOR MEASURING THREADS

If a thread gauge and caliper are not available, and a sample cannot be sent, the following method can be used to obtain the correct outside diameter and pitch of the thread needed.

 

 

  • Cut a strip of paper about 1"(25mm) wide, long enough to wrap tightly around the circumference of the male thread and overlap at the ends.
  • With a pin, pierce through both layers of the paper (fig.1).
  • Press your thumb firmly against the thread hard enough to make a thread impression on the strip (fig. 2).
  • Remove the strip and circle the pin holes on the strip with a pencil (fig. 3).
  • Divide the distance between the pin holes by 3.1416. The result is the ODM (outside diameter of the male).

It is important that both the ODM and threads per inch (pitch) of the male part are given when ordering. Always include the paper strip with your correspondence. If not specified, "V" sharp thread will be furnished.

GASKETS

High quality swivel gaskets are lathe cut ozone free EPDM.

DESCRIPTION OF THREADED FITTINGS BY SERIES

N35 Series – Female Swivel Rocker Lug x Female Swivel - Rocker Lug.
N36 Series – Male Provincial Thread x Male Provincial Thread - Rocker Lug.
N37 Series – Female Rigid Provincial Thread x Male Provincial Thread - Rocker Lug.
N53 Series – Female Swivel Rocker Lug x Female Rigid Rocker Lug.
N56 Series – Female Rigid Long Handle x Male Provincial Thread.
N57 Series – Female Swivel Long Handle x Female Swivel Long Handle.
CAP Series – Female Threaded Cap with Chain.
PLUG Series – Male Threaded Plug with Chain.

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