Selecting U-Bolts Using Pipe, Conduit, or Tubing Trade Size
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Selecting Clamps Using Pipe, Conduit, or Tubing Trade Size
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About Conduit
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Adapters for Flexible Plastic Conduit
Tabs on one end snap into grooves in conduit; the other end attaches to a knockout in an outlet box or enclosure. These adapters help seal out air and liquid when used with flexible plastic conduit. All meet IP68 for prolonged submersion and IP69K for high-pressure, high-temperature washdowns. They withstand vibration, are flame retardant, and resist oil, solvents, and UV light.

Conduit Connection | Electrical Box Connection | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Conduit Trade Size | Conduit Connection Type | Gender | Thread Size | Thread Type | Gender | Material | Color | Temperature Range, °F | Environmental Rating | Specifications Met | Each | |
Metric | ||||||||||||
1/4 | Snap-In | Female | M12 | Metric | Male | Nylon | Black | -40° to 245° | IP68, IP69K | UL 94 V-0, UL Recognized Component | 0000000 | 00000 |

Conduit Connection | Electrical Box Connection | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Conduit Trade Size | Conduit Connection Type | Gender | Thread Size | Thread Type | Gender | Material | Color | Temperature Range, °F | Environmental Rating | Specifications Met | Each | |
Metric | ||||||||||||
1/4 | Snap-In | Female | M12 | Metric | Male | Nylon | Black | -40° to 245° | IP68, IP69K | UL Recognized Component, UL 94 V-0 | 0000000 | 000000 |

Conduit Connection | Electrical Box Connection | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Conduit Trade Size | Conduit Connection Type | Gender | Thread Size | Thread Type | Gender | Material | Color | Temperature Range, °F | Environmental Rating | Specifications Met | Each | |
Metric | ||||||||||||
5/16 | Snap-In | Female | M12 | Metric | Male | Nylon | Black | -40° to 245° | IP68, IP69K | UL Recognized Component, UL 94 V-0 | 0000000 | 000000 |
Fittings for Shielded Flexible Plastic Conduit

These adapters provide electromagnetic interference (EMI) protection when connecting shielded flexible plastic conduit to a knockout in an outlet box or enclosure. Twist the compression end over the conduit; tighten the compression ring to secure.
A brass locknut is required (not included) when installing in an unthreaded knockout.
Clamping U-Bolts

Also known as muffler clamps, these U-bolts have a rounded mounting plate that fully surrounds pipe, conduit, and tubing for a secure fit. Stronger than routing clamps and hangers, U-bolts support heavy pipe, tube, and conduit from ceilings, walls, and poles.
Zinc-plated steel U-bolts have good corrosion resistance in most environments.
U-bolts with four nuts allow you to secure the U-bolt from the top and the bottom.
ID | Thread | Mounting Plate | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Inch | Metric, mm | For Pipe Size | Ht. | Lg. | Pitch, mm | Ctr.-to-Ctr. | Material | Color | Lg. | Wd. | Thick. | No. of Nuts Included | Temp. Range, °F | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||||||||||
M12 Thread Size | ||||||||||||||||
2 1/2" | 64 | 2 | 3 13/16" | 2 3/8" | 1.75 | 3" | Plastic | Black | 4 5/16" | 1 3/8" | 19/32" | 4 | -20° to 190° F | 1 | 0000000 | 000000 |
3 1/16" | 78 | 2 1/2 | 4 13/16" | 3" | 1.75 | 3 11/16" | Plastic | Green | 5 5/16" | 1 3/8" | 19/32" | 4 | -20° to 190° F | 1 | 00000000 | 00000 |
3 1/4" | 83 | __ | 4 1/2" | 2 3/8" | 1.75 | 3 11/16" | Plastic | Black | 5 5/16" | 1 3/8" | 19/32" | 4 | -20° to 190° F | 1 | 0000000 | 00000 |
3 11/16" | 94 | 3 | 5" | 2 3/8" | 1.75 | 4 3/16" | Plastic | Black | 5 11/16" | 1 9/16" | 13/16" | 4 | -20° to 190° F | 1 | 0000000 | 00000 |
Railing Clamps

Clamp onto metal tubes such as pipe, scaffolding, and railing to hang lighting fixtures, threaded rod, and equipment. Made of aluminum, all of these clamps are lightweight and have good corrosion resistance.
Style C clamps have wing nuts for making adjustments. Remove the wing nut from the bottom bolt and reattach after mounting equipment.
For OD | |||||||||||
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Style | Inch | Metric, mm | For Pipe Size | Bolt Material | Cap., lbs. | Mount Type | Lg. | Wd. | Ht. | Each | |
Aluminum | |||||||||||
C | 1 15/16"-2" | 49-51 | 1 1/2 | Steel | 1,650 | Clamp On | 4 1/4" | 2" | 5 3/4" | 0000000 | 000000 |