QB Electrical
*Full Size Range: ½" to 4" | NPSM Thread | Concrete-Tight Seal*
✔ Complete Size Selection - Available in 10 standard EMT sizes (½" to 4")
✔ Secure Conduit-to-Box Connection – Set screw retention for rigid EMT coupling
✔ Weather-Resistant Zinc Plating – Corrosion protection for indoor/outdoor use
✔ Concrete-Tight Seal – Achieves NEC-compliant seals when properly taped
✔ Includes – Zinc-plated rigid locknut with each connector
| Trade Size | Actual OD | Common Applications |
|---|---|---|
| ½" | 0.706" | Residential lighting circuits |
| ¾" | 0.922" | Branch wiring |
| 1" | 1.163" | Feeder lines |
| 1¼" | 1.540" | Commercial installations |
| 1½" | 1.740" | |
| 2" | 2.197" | Industrial conduits |
| 2½" | 2.875" | |
| 3" | 3.500" | Heavy-duty raceways |
| 3½" | 4.000" | |
| 4" | 4.500" | Large capacity runs |
Material: Heavy-gauge zinc-plated steel
Thread: NPSM (National Pipe Straight Mechanical)
Standards:
UL 514B Listed
NEMA FB-1 Compliant
NEC Concrete-Tight when taped
No-Slip Grip: Serrated teeth bite into conduit
Vibration-Resistant: Locknut prevents loosening
Universal Use: Compatible with all standard EMT fittings
EC-1/2"
Shipping calculated at checkout.
EMT Set Screw Connector EC
QB Electrical
EMT Set Screw Connector ECEC-1/2"
*Full Size Range: ½" to 4" | NPSM Thread | Concrete-Tight Seal*
✔ Complete Size Selection - Available in 10 standard EMT sizes (½" to 4")
✔ Secure Conduit-to-Box Connection – Set screw retention for rigid EMT coupling
✔ Weather-Resistant Zinc Plating – Corrosion protection for indoor/outdoor use
✔ Concrete-Tight Seal – Achieves NEC-compliant seals when properly taped
✔ Includes – Zinc-plated rigid locknut with each connector
| Trade Size | Actual OD | Common Applications |
|---|---|---|
| ½" | 0.706" | Residential lighting circuits |
| ¾" | 0.922" | Branch wiring |
| 1" | 1.163" | Feeder lines |
| 1¼" | 1.540" | Commercial installations |
| 1½" | 1.740" | |
| 2" | 2.197" | Industrial conduits |
| 2½" | 2.875" | |
| 3" | 3.500" | Heavy-duty raceways |
| 3½" | 4.000" | |
| 4" | 4.500" | Large capacity runs |
Material: Heavy-gauge zinc-plated steel
Thread: NPSM (National Pipe Straight Mechanical)
Standards:
UL 514B Listed
NEMA FB-1 Compliant
NEC Concrete-Tight when taped
No-Slip Grip: Serrated teeth bite into conduit
Vibration-Resistant: Locknut prevents loosening
Universal Use: Compatible with all standard EMT fittings
Shipping calculated at checkout.
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