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Part No. T-WRENCH$13.90Stem Caster Wrench Double end opening wrench - 17mm / 19mm
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()W-4EF
4" Rigid Stem Caster
The 4 inch rigid stem caster has a loading capacity of 250 pounds (113 kg) and a maximum speed of 2.5Mph. The stem-mount is made with a rubber bushing that expands into a 28 mm steel pipe to keep the wheel in place. You will need to secure the wheel by placing it on a connector with WF-U5/16 U-Bolt (included with the caster). Bolt M12 (12 mm) Length 2 1/4" (57.15 mm). All casters are equipped with a precision ball bearing.
4 inch casters are made for:
- Longer trips (100 feet maximum)
- Higher frequency trips (100 to 150 times a day)
- Carts weighting more than 400 pounds
- Larger carts (greater than 24 in. wide and 48 in. long)
W-4EF has an electric conductivity version (ESD): EW-4EF
A Flexpipe Product

The 4 inch rigid stem caster has a loading capacity of 250 pounds (113 kg) and a maximum speed of 2.5Mph. The stem-mount is made with a rubber bushing that expands into a 28 mm steel pipe to keep the wheel in place. You will need to secure the wheel by placing it on a connector with WF-U5/16 U-Bolt (included with the caster). Bolt M12 (12 mm) Length 2 1/4" (57.15 mm). All casters are equipped with a precision ball bearing.
4 inch casters are made for:
- Longer trips (100 feet maximum)
- Higher frequency trips (100 to 150 times a day)
- Carts weighting more than 400 pounds
- Larger carts (greater than 24 in. wide and 48 in. long)
W-4EF has an electric conductivity version (ESD): EW-4EF
A Flexpipe Product

| ESD Safe | No |
| Weight | 1.500000 |
| Series | Fractional, Metric, Pipe |
| Type | Swivel |
| Material | Thermoplastic Rubber |
| Color | Gray Wheels / Gray Rims |
| Load Capacity | 250 lbs (113 kg) |
| Stem Size | M12 x 2.25” (57.15mm) |
| Wheel Diameter | 4.000” (100.00mm) |
| Caster Height | 5.000” (127.00mm) |
| Wheel Width | 1.125” (28.00mm) |
| Max Speed | 2.5 mph |
The 4 inch rigid stem caster has a loading capacity of 250 pounds (113 kg) and a maximum speed of 2.5Mph. The stem-mount is made with a rubber bushing that expands into a 28 mm steel pipe to keep the wheel in place. You will need to secure the wheel by placing it on a connector with WF-U5/16 U-Bolt (included with the caster). Bolt M12 (12 mm) Length 2 1/4" (57.15 mm). All casters are equipped with a precision ball bearing.
4 inch casters are made for:
- Longer trips (100 feet maximum)
- Higher frequency trips (100 to 150 times a day)
- Carts weighting more than 400 pounds
- Larger carts (greater than 24 in. wide and 48 in. long)
W-4EF has an electric conductivity version (ESD): EW-4EF
A Flexpipe Product

Product Specs
- Product Details
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ESD Safe No Weight 1.500000 Series Fractional, Metric, Pipe Type Swivel Material Thermoplastic Rubber Color Gray Wheels / Gray Rims Load Capacity 250 lbs (113 kg) Stem Size M12 x 2.25” (57.15mm) Wheel Diameter 4.000” (100.00mm) Caster Height 5.000” (127.00mm) Wheel Width 1.125” (28.00mm) Max Speed 2.5 mph
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- Description
The 4 inch rigid stem caster has a loading capacity of 250 pounds (113 kg) and a maximum speed of 2.5Mph. The stem-mount is made with a rubber bushing that expands into a 28 mm steel pipe to keep the wheel in place. You will need to secure the wheel by placing it on a connector with WF-U5/16 U-Bolt (included with the caster). Bolt M12 (12 mm) Length 2 1/4" (57.15 mm). All casters are equipped with a precision ball bearing.
4 inch casters are made for:
- Longer trips (100 feet maximum)
- Higher frequency trips (100 to 150 times a day)
- Carts weighting more than 400 pounds
- Larger carts (greater than 24 in. wide and 48 in. long)
W-4EF has an electric conductivity version (ESD): EW-4EF
A Flexpipe Product

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CAD Files
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CAD Files
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