Duct And Fittings

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NORDFAB -

End Caps

StyleModelFor Duct DiameterMaterial ThicknessInside Dia.FinishOverall DepthFor Nominal Duct DiameterMax. Temp. RatingConnection TypePrice
A80100037334"22 ga.4"Not Applicable4"4"-Clamp Together€83.95
A80100037735"22 ga.5"Galvanized5"5"-Clamp Together€46.92
A80100037345"22 ga.5"Not Applicable5"5"-Clamp Together€88.58
A80100037356"22 ga.6"Not Applicable6"6"-Clamp Together€105.38
A80100037367"22 ga.7"Not Applicable7"7"1100°FClamp Together€113.41
A80100037757"22 ga.7"Galvanized7"7"-Clamp Together€57.41
A80100037378"22 ga.8"Not Applicable8"8"1100°FClamp Together€126.02
A80100037389"22 ga.9"Not Applicable9"9"1100°FClamp Together€126.93
A80100037779"22 ga.9"Galvanized9"9"390°FClamp Together€66.57
B801000373010"22 ga.10"Not Applicable10"10"1100°FClamp Together€141.41
A801000373212"22 ga.12"Not Applicable12"12"1100°FClamp Together€154.23
A801000371914"20 ga.14"Not Applicable14"14"1100°FClamp Together€160.62
A801000372116"20 ga.16"Not Applicable16"16"-Clamp Together€173.51
NORDFAB -

Elbow 45 Degree

StyleModelFor Duct DiameterMaterial ThicknessCenterline RadiusDuct SizeDiameterTypeCoatingConnection TypePrice
A80100009514"24 ga.1"4"4"45 Degrees ElbowGalvanizedClamp Together€101.35
A80100009616"24 ga.1"6"6"45 Degrees ElbowGalvanizedClamp Together€141.41
A80404000028"22 ga.1 1/2"8"8"45 Degrees ElbowGalvanizedClamp Together€221.10
A804040001010"22 ga.1 1/2"10"10"45 Degrees ElbowGalvanizedClamp Together€229.75
A804040001812"22 ga.1 1/2"12"12"45 Degrees ElbowGalvanizedClamp Together€240.90
AIR SYSTEMS INTERNATIONAL -

Hand Tight Fittings

StyleModelMax. PressureThread TypeHand TightPrice
ASS347HT5500 psiMaleUniversal€129.50
BSS347SNHT5500 psiMale-€137.90
RFQ
AMERI-VENT -

Liners

StyleModelConnection TypeEnd TypeInside Dia.Max. Temp. RatingFor Nominal Duct DiameterCompatible With Fuel TypeInterior TextureMaximum Continuous LengthPrice
A4MF25KTClamp TogetherPlain4"1200°F4"All FuelCorrugated25 ft.€918.93
B4MF25SFLClamp TogetherPlain4"1200°F4"All FuelCorrugated25 ft.€584.97
A4MF35KTClamp TogetherPlain4"1200°F4"All FuelCorrugated35 ft.€1,053.75
B4MF35SFLClamp TogetherPlain4"1200°F4"All FuelCorrugated35 ft.€809.76
A6MF25KTClamp TogetherPlain6"1200°F6"All FuelCorrugated25 ft.€1,073.97
B6MF35SFLClamp TogetherPlain6"1200°F6"All FuelCorrugated35 ft.€1,092.49
A6MF35KTClamp TogetherPlain6"1200°F6"All FuelCorrugated35 ft.€1,343.45
B8MF25SFLClamp TogetherPlain8"1200°F8"All FuelCorrugated25 ft.€1,074.86
A8MF25KTClamp TogetherPlain8"1200°F8"All FuelCorrugated25 ft.€1,453.44
A8MF35KTClamp TogetherPlain8"1200°F8"All FuelCorrugated35 ft.€1,659.34
B6MF25SFLClamp TogetherPlain6"1200°F6"All FuelCorrugated25 ft.€850.59
C6FX-PDNot ApplicableNot Applicable6"470°F6"LPGSmooth35 ft.€23.03
FLAME GARD -

Duct Access Doors

StyleModelMaterial FabricationDoor HeightDoor ShapeMounting Stud LengthNumber Of Mounting StudDoor WidthRough Opening HeightRough Opening WidthPrice
A6EJA6Cold Rolled15"Square1"815"12"12"€168.73
B6EJA1Cold Rolled7"Rectangular1"1023"5 1/2"21 1/2"€314.62
C6EJA2Cold Rolled8"Square1"48"6"6"€131.28
D6EJA4Cold Rolled10"Rectangular1"615"7"12"€145.70
E6EJA5Cold Rolled10"Rectangular1"1023"7"20"€151.38
F6EJA0Cold Rolled7"Rectangular1"6-5 1/2"13 1/2"€122.20
G6EJA7Cold Rolled15"Rectangular1"1423"12"20"€235.10
H6EJA8Cold Rolled19"Rectangular1"1623"16"20"€173.82
I6EJA3Cold Rolled10"Square1"410"7"7"€126.32
J6EHZ9Cold Rolled7"Rectangular1"610"5 1/2"8 1/2"€111.60
K6EJA9Cold Rolled23"Square1"1623"20"20"€212.02
L6EJC1Hot Dipped8"Rectangular6"212"--€141.17
M6EJC2Hot Dipped14"Rectangular6"218"--€150.20
N6EJC0Hot Dipped6"Rectangular6"210"--€91.61
TB WOODS -

Filler Duct

StyleModelMPNPrice
AV901-T011V901-T011€369.60
RFQ
AV901-T012V901-T012€145.20
RFQ
AV905-T010V905-T010€369.60
RFQ
PLASTIC SUPPLY -

Reducer Pvc

StyleModelFor Duct DiameterDuct SizeInlet DiameterMaterial ThicknessTypeConnection TypeEnd TypeColorPrice
APVCR06X045", 7"6" x 4"7"1/5"ReducerPress FitPlainDark Gray€179.74
APVCR08X067", 9"8" x 6"9"1/5"ReducerPress FitPlainDark Gray€225.75
APVCR10X089", 11"10" x 8"11"1/5"ReducerPress FitPlainDark Gray€267.54
APVCR12X1011", 12"12" x 10"12"1/5"ReducerPress FitPlainDark Gray€321.72
APVCR14X1214"14" x 12"14"1/5"ReducerPress FitPlainDark Gray€451.14
APVCR16X1416"16" x 14"16"1/5"ReducerPress FitPlainDark Gray€465.15
StyleModelFor Duct DiameterMaterial ThicknessDuct SizeDiameterTypeCoatingConnection TypeEnd TypePrice
AGRFTJ4GA264"26 ga.4"4"TEEGalvanizedPress FitPlain, Crimped€74.22
AGRFTJ6GA266"26 ga.6"6"TEEGalvanizedPress FitPlain, Crimped€91.52
AGRFTJ6GA246"24 ga.6"6"TEEGalvanizedPress FitPlain, Crimped€100.99
AGRFTJ8GA268"26 ga.8"8"TEEGalvanizedPress FitPlain, Crimped€104.71
AGRFTJ8GA248"24 ga.8"8"TEEGalvanizedPress FitPlain, Crimped€109.14
AGRFTJ10GA2410"24 ga.10"10"TEEGalvanizedPress FitPlain, Crimped€141.37
AGRFTJ10GA2610"26 ga.10"10"TEEGalvanizedPress FitPlain, Crimped€129.91
AGRFTJ12GA2412"24 ga.12"12"TEEGalvanizedPress FitPlain, Crimped€179.70
AGRFTJ12GA2612"26 ga.12"12"TEEGalvanizedPress FitPlain, Crimped€161.69
AGRFTJ14GA2614"26 ga.14"14"TEEGalvanizedPress FitPlain, Crimped€186.00
AGRFTJ14GA2414"24 ga.14"14"TEEGalvanizedPress FitPlain, Crimped€186.00
DUCTMATE -

Inch Diameter Gauge Snap Pipe End Cap

StyleModelFor Duct DiameterMaterial ThicknessTypeDuct SizeDiameterInlet DiameterCoatingConnection TypePrice
AGRECP4GA244"24 ga.End Cap4"4"-GalvanizedPress Fit€18.28
AGRECP4GA264"26 ga.End Cap4"4"-GalvanizedPress Fit€10.80
AGRECP6GA266"26 ga.End Cap6"6"-GalvanizedPress Fit€11.81
AGRECP6GA246"24 ga.End Cap6"--GalvanizedPress Fit€14.17
AGRECP8GA268"26 ga.End Cap8"8"-GalvanizedPress Fit€14.84
AGRECP8GA248"24 ga.End Cap8"8"-GalvanizedPress Fit€17.56
AGRECP10GA2610"26 ga.End Cap10"10"-GalvanizedPress Fit€20.78
AGRECP10GA2410"24 ga.End Cap10"--GalvanizedPress Fit€25.68
BGRR10P6PGA2610"26 ga.Reducer-10" x 6"-GalvanizedPress Fit€30.98
BGRR10P8PGA2610"26 ga.Reducer10 ft. x 8"--GalvanizedPress Fit€30.98
AGRECP12GA2612"26 ga.End Cap12"12"-GalvanizedPress Fit€23.93
AGRECP12GA2412"24 ga.End Cap12"12"12"GalvanizedPress Fit€29.70
BGRR12P6PGA2612"26 ga.Reducer12" x 6"12" x 6"-GalvanizedPress Fit€32.33
AGRECP14GA2614"26 ga.End Cap14"14"14"GalvanizedPress Fit€32.26
AGRECP14GA2414"24 ga.End Cap14"14"14"GalvanizedPress Fit€38.40
DUCTMATE -

Inch Diameter Gauge Self Seal Snap Lock

StyleModelFor Duct DiameterMaterial ThicknessDuct SizeColorDiameterTypeCoatingConnection TypePricePkg. Qty.
AGR60SPBGP4GA264"26 ga.4"Black4"Snap PipeGalvanizedPress Fit€97.265
AGR60SPBGP6GA246"24 ga.6"Black6"Snap PipeGalvanizedPress Fit€191.275
AGR60SPBGP6GA266"26 ga.6"Black6"Snap PipeGalvanizedPress Fit€128.255
AGR60SPBGP8GA248"24 ga.8"Silver-Snap PipeGalvanizedPress Fit€292.325
AGR60SPBGP8GA268"26 ga.8"Black8"Snap PipeGalvanizedPress Fit€152.155
AGR60SPBGP10GA2410"24 ga.10"Black10"Snap PipeGalvanizedPress Fit€369.385
AGR60SPBGP10GA2610"26 ga.10"Black10"Snap PipeGalvanizedPress Fit€191.075
AGR60SPBGP12GA2412"24 ga.12"Black12"-GalvanizedPress Fit€423.685
AGR60SPBGP12GA2612"26 ga.12"Black12"Snap PipeGalvanizedPress Fit€243.325
AGR60SPBGP14GA2614"26 ga.14"Black14"Snap PipeGalvanizedPress Fit€293.955
BGR60SPBGP14GA2414"24 ga.14"Black14"Snap PipeGalvanizedPress Fit€419.935
DUCTMATE -

Inch Diameter Gauge Self Seal Collar With Damper

StyleModelFor Duct DiameterMaterial ThicknessDuct SizeDiameterCoatingConnection TypeEnd TypeFinishPrice
AGR6POCR4GA26D4"26 ga.4"4"GalvanizedPress FitCrimpedGalvanized€35.06
BGR6POCR6GA26D6"26 ga.6"6"GalvanizedPress FitCrimpedGalvanized€38.32
BGR6POCR6GA24D6"24 ga.6"6"GalvanizedPress FitCrimpedGalvanized€47.61
BGR6POCR8GA26D8"26 ga.8"8"GalvanizedPress FitCrimpedGalvanized€42.14
BGR6POCR8GA24D8"24 ga.8"8"GalvanizedPress FitCrimpedGalvanized€53.93
BGR6POCR10GA26D10"26 ga.10"-GalvanizedPress FitCrimpedGalvanized€51.45
BGR6POCR10GA24D10"24 ga.10"10"GalvanizedPress FitCrimpedGalvanized€65.84
BGR6POCR12GA26D12"26 ga.12"12"GalvanizedPress FitCrimpedGalvanized€50.11
BGR6POCR12GA24D12"24 ga.12"12"GalvanizedPress FitCrimpedGalvanized€63.43
BGR6POCR14GA24D14"24 ga.14"14"GalvanizedPress FitCrimpedGalvanized€64.94
BGR6POCR14GA26D14"26 ga.14"14"GalvanizedPress FitCrimpedGalvanized€59.26
StyleModelFor Duct DiameterMaterial ThicknessCenterline RadiusDuct SizeDiameterTypeCoatingConnection TypePrice
AGRAE890GA24---8"-90 Degrees ElbowGalvanized-€17.55
AGRAE490GA244"24 ga.5"4"4"90 Degrees ElbowGalvanizedPress Fit€14.84
AGRAE490GA264"26 ga.5"4"4"90 Degrees ElbowGalvanizedPress Fit€8.54
AGRAE690GA266"26 ga.6"6"6"90 Degrees ElbowGalvanizedPress Fit€9.81
AGRAE690GA246"24 ga.6"6"6"90 Degrees ElbowGalvanizedPress Fit€16.47
AGRAE890GA268"26 ga.7"8"8"90 Degrees ElbowGalvanizedPress Fit€12.11
AGRAE1090GA2610"26 ga.9"10"10"90 Degrees ElbowGalvanizedPress Fit€20.49
AGRAE1090GA2410"24 ga.9"10"-90 Degrees ElbowGalvanizedPress Fit€29.70
AGRAE1290GA2612"26 ga.10"12"12"90 Degrees ElbowGalvanizedPress Fit€22.97
AGRAE1290GA2412"24 ga.10"12"12"90 Degrees ElbowGalvanizedPress Fit€27.67
AGRAE1490GA2614"26 ga.10 1/2"14"14"90 Degrees ElbowGalvanizedPress Fit€25.98
AGRAE1490GA2414"24 ga.10 1/2"14"14"90 Degrees ElbowGalvanizedPress Fit€32.24
PLASTIC SUPPLY -

End Caps Pvc

StyleModelFor Duct DiameterDuct SizeInlet DiameterMaterial ThicknessConnection TypeColorPrice
APVCCA16-16"----€245.78
BPVCCA04------€59.01
APVCCA066"6"6 5/8"0.1875"SocketDark Gray€132.82
APVCCA088"8"8 5/8"0.1875"SocketDark Gray€160.01
APVCCA1010"-10 3/4"0.1875"SocketDark Gray€164.23
APVCCA1212"12"12 3/4"0.1875"SocketDark Gray€181.61
APVCCA1414"14"14"0.1875"SocketDark Gray€184.41
PLASTIC SUPPLY -

Elbow Pvc 90 Degree

StyleModelFor Duct DiameterCenterline RadiusInlet DiameterDuct SizeMaterial ThicknessConnection TypeEnd TypeAnglePrice
APVCEA044"4 1/2"4 1/2"-1/5"SocketPlain90°€71.48
BPVCEA066"9 5/8"6 5/8"6"1/5"SocketPlain90°€165.67
CPVCEC066"13"6 5/8"-1/5"SocketPlain90°€328.10
BPVCEA088"11 5/8"8 5/8"8"1/5"SocketPlain90°€209.54
CPVCEC088"16"8 5/8"8"1/5"SocketPlain90°€344.16
BPVCEA1010"13 3/4"10 3/4"10"1/5"SocketPlain90°€254.33
CPVCEC1010"19"10 3/4"10"1/5"SocketPlain90°€325.18
BPVCEA1212"15 3/4"12 3/4"12"1/5"SocketPlain90°€290.96
CPVCEC1212"21"12 3/4"12"1/5"SocketPlain90°€434.49
CPVCEC1414"24"14"14"1/5"SocketPlain90°€514.42
BPVCEA1616"19"16"16"1/5"SocketPlain90°€461.12
CPVCEC1616"27"16"16"1/5"SocketPlain90°€624.50
PLASTIC SUPPLY -

Elbow Pvc 45 Degree

StyleModelFor Duct DiameterCenterline RadiusInlet DiameterDuct SizeMaterial ThicknessTypeConnection TypeEnd TypePrice
APVCED12---12"-45°--€157.91
BPVCED044"3"4 1/2"-1/5"-SocketPlain€79.57
APVCED066"5 3/4"6 5/8"-1/5"45°SocketPlain€136.72
APVCED088"6 3/4"8 5/8"8"1/5"45°SocketPlain€150.42
APVCED1010"7 1/2"10 3/4"10"1/5"45°SocketPlain€157.65
APVCED1414"9"14"14"1/5"45°SocketPlain€237.29
APVCED1616"9 3/4"16"16"1/5"45°SocketPlain€270.19
NORDFAB -

Elbow 60 Degree

StyleModelFor Duct DiameterMaterial ThicknessCenterline RadiusDuct SizeDiameterTypeCoatingConnection TypePrice
A80100009524"24 ga.1"4"4"60 Degrees ElbowGalvanizedClamp Together€127.06
A80100009626"24 ga.1"6"6"60 Degrees ElbowGalvanizedClamp Together€170.09
A80404000038"22 ga.1 1/2"8"8"60 Degrees ElbowGalvanizedClamp Together€276.25
A804040001110"22 ga.1 1/2"10"10"60 Degrees ElbowGalvanizedClamp Together€303.80
A804040001912"22 ga.1 1/2"12"12"60 Degrees ElbowGalvanizedClamp Together€331.55
NORDFAB -

Elbow 30 Degree

StyleModelFor Duct DiameterMaterial ThicknessCenterline RadiusDuct SizeDiameterTypeCoatingConnection TypePrice
A8010000950---4"4"30 Degrees ElbowGalvanized-€116.14
A80100009606"24 ga.1"6"6"30 Degrees ElbowGalvanizedClamp Together€148.14
A80404000018"22 ga.1 1/2"8"8"30 Degrees ElbowGalvanizedClamp Together€205.13
A804040000910"22 ga.1 1/2"10"10"30 Degrees ElbowGalvanizedClamp Together€220.31
A804040001712"22 ga.1 1/2"12"12"30 Degrees ElbowGalvanizedClamp Together€231.10
StyleModelColorPrice
A4351S-200Gray€684.57
A4351S-100Gray€322.24
A4351S-140Gray€401.71
A4351S-240Gray€762.70
A4351S-180Gray€511.51
A4351S-160Gray€440.64
A4351S-080Gray€309.29
A4351S-060Gray€292.04
A4351S-120Gray€373.30
NORDFAB -

Blastgates

Nordfab Quick-Fit blast gates are designed to focus the vacuum pressure to a dust extraction system for maximising the dust collection. These manual units feature a robust design to reduce air loss & friction and aluminium / galvanised steel construction for strength & corrosion resistance. They are integrated with a rolled-edge design, on the ends, providing easy connection with a barrel type clamp and a gasket, under the clamp, to seal the joints tightly. Selected models further come equipped with an automatic control facility operated by double-acting compressed air cylinders with standard 120 V control circuit and 75 psi (min) air pressure; suitable for dust, mist & fume collection applications. Choose from a wide range of these dampers available in duct sizes ranging from 4 to 16 inches on Raptor Supplies.

StyleModelFor Duct DiameterMaterial ThicknessOverall DepthDuct SizeInside Dia.Max. Temp. RatingConnection TypeEnd TypePrice
A8010002276---14"----€560.04
B8010004635---4"----€867.25
C8010002403---14"----€2,660.62
D80100049564"20 ga.10 1/4"4"--Clamp TogetherQuick Fit€1,445.67
E80100022224"22 ga.5 1/2"-4"1100°FClamp TogetherQuick Fit€385.05
C80100024514"22 ga.16"4"--Clamp TogetherQuick Fit€2,313.14
E80100022245"22 ga.5 1/2"-5"1100°FClamp TogetherQuick Fit€452.26
E80100023005"22 ga.5 5/8"-5"390°FClamp TogetherQuick Fit€86.46
B80100046376"22 ga.5"6"--Clamp TogetherQuick Fit€1,035.51
D80100049656"20 ga.14 1/2"6"--Clamp TogetherQuick Fit€1,220.30
C80100024636"22 ga.20 1/2"6"--Clamp TogetherQuick Fit€2,428.94
E80100022336"22 ga.5 1/2"-6"1100°FClamp TogetherQuick Fit€619.25
E80100022277"22 ga.5 1/4"-7"1100°FClamp TogetherQuick Fit€643.51
E80100023047"22 ga.5 1/2"-7"390°FClamp TogetherQuick Fit€146.03
D80100049758"20 ga.18 3/4"8"--Clamp TogetherQuick Fit€1,907.36
B80100046398"22 ga.5"8"--Clamp TogetherQuick Fit€865.96
E80100022298"22 ga.5 1/4"-8"1100°FClamp TogetherQuick Fit€688.46
C80100024748"22 ga.25 1/2"8"--Clamp TogetherQuick Fit€2,487.24
E80100023089"22 ga.5 1/2"-9"390°FClamp TogetherQuick Fit€225.53
E80100022319"22 ga.5 1/2"-9"1100°FClamp TogetherQuick Fit€840.52
B801000463010"22 ga.5"10"--Clamp TogetherQuick Fit€1,239.02
E801000221310"22 ga.5 1/4"-10"1100°FClamp TogetherQuick Fit€907.31
C801000243310"22 ga.33"10"--Clamp TogetherQuick Fit€2,552.72
D801000494210"20 ga.22 5/8"10"--Clamp TogetherQuick Fit€1,807.47
B801000463112"22 ga.5"12"--Clamp TogetherQuick Fit€1,283.89
NORDFAB -

90 Degree Elbows

StyleModelFor Duct DiameterMaterial ThicknessCenterline RadiusInside Dia.Duct SizeConnection TypeEnd TypeAnglePrice
A80100036514"14 ga.2 1/2"4"-Clamp TogetherRolled Edge90°€479.32
B80100059584"24 ga.1 1/2"--Clamp TogetherRolled Edge90°€134.78
A80100036504"14 ga.1 1/2"4"-Clamp TogetherRolled Edge90°€262.16
A80100037144"16 ga.1 1/2"4"-Clamp TogetherRolled Edge90°€191.28
B80100009585"24 ga.1"5"-Clamp TogetherRolled Edge90°€141.01
A80100036825"14 ga.1 1/2"5"-Clamp TogetherRolled Edge90°€313.66
A80100036585"14 ga.1 1/2"5"-Clamp TogetherRolled Edge90°€533.62
C80100059625"24 ga.1 1/2"5"-Clamp TogetherRolled Edge90°€150.81
A80100036595"14 ga.2 1/2"5"-Clamp TogetherRolled Edge90°€720.44
A80100036906"14 ga.1 1/2"6"-Clamp TogetherRolled Edge90°€415.43
A80100036676"14 ga.2 1/2"6"-Clamp TogetherRolled Edge90°€869.27
A80100036666"14 ga.1 1/2"6"-Clamp TogetherRolled Edge90°€650.47
B80100059666"24 ga.1 1/2"6"-Clamp TogetherRolled Edge90°€168.16
D80404000727"22 ga.1 1/2"--Clamp TogetherRolled Edge90°€605.60
C80100059707"24 ga.1 1/2"7"-Clamp TogetherRolled Edge90°€224.57
B80100009687"24 ga.1"7"-Clamp TogetherRolled Edge90°€213.57
D80404009248"22 ga.2 1/2"8"-Clamp TogetherRolled Edge90°€768.04
D80404000768"22 ga.1 1/2"8"-Clamp TogetherRolled Edge90°€638.61
A80100036988"14 ga.1 1/2"--Clamp TogetherRolled Edge90°€714.62
A80100036748"14 ga.1 1/2"8"-Clamp TogetherRolled Edge90°€1,089.01
E80404008528"22 ga.2 1/2"8"-Clamp TogetherRolled Edge90°€353.73
E80404000089"22 ga.1 1/2"9"-Clamp TogetherRolled Edge90°€280.02
D80404000809"22 ga.1 1/2"9"-Clamp TogetherRolled Edge90°€665.56
D804040008410"22 ga.1 1/2"10"-Clamp TogetherRolled Edge90°€670.96
D804040009212"22 ga.1 1/2"12"-Clamp TogetherRolled Edge90°€847.25
NORDFAB -

Flange Adapters

StyleModelFor Duct DiameterDuct SizeInlet DiameterFlange Inner DiameterMaterial ThicknessCoatingConnection TypeEnd TypePrice
A804040183014"14"14"14 1/8"20 ga.GalvanizedClamp TogetherQuick-Fit€204.77
A804040183216"16"16"16 1/8"20 ga.GalvanizedClamp TogetherQuick-Fit€222.65
12...67

Duct And Fittings

Ducts and fittings are designed for circulating air in HVAC systems. Raptor Supplies offers a wide range of branch tees, dampers, clamps, couplings, adapters, O-rings, pipes, elbows, caps, fasteners, plugs, connectors & more, from brands like Ductmate, GF Piping Systems, Honeywell, Nordfab, Plastic Supply and Vulcan Hart. Duct clamps are fastened over duct pipes to create a tight seal. They feature a lock mechanism to quickly open and close the clamp. Duct reducers are ideal for connecting HVAC ducts of two different sizes.