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Small copper split-bolt connector with square head and .5 in hex nut, unplated finish

Burndy

Burndy KS90 Split-Bolt Connector 12-10 AWG

SKU CH-GYF7-GWA4J

Split-bolt connector joins 12–10 AWG copper run wires with 16–10 AWG tap wires, rated 35 kV and 80 in-lb torque

  • Product typeElectrical Connectors
  • Connects copper wire from 12 to 10 AWG run sizes
  • Accepts tap wires as small as 16 AWG up to 10 AWG
  • Rated for 35 kV maximum voltage with 80 in-lb torque
  • Square-head hex nut measures .5 in for secure tightening
  • Meets UL 467, UL 486 A/B, CSA and RoHS standards

Application and Compatibility

The Burndy KS90 split-bolt connector joins solid or stranded copper conductors in electrical and industrial wiring tasks. It accepts a run wire from 12 AWG to 10 AWG and a tap wire from 16 AWG to 10 AWG. The unplated copper body and square-head design suit copper-to-copper connections in panel work or field repairs.

Upgrade Context

This connector replaces older split bolts that lack CSA certification or dual UL 467 and UL 486 A/B listings. The jump is worth it when a job requires documented compliance with ARRA and EU RoHS standards alongside a 35 kV maximum voltage rating. Installers gain a single part that satisfies multiple inspection requirements without mixing hardware.

Capacity and Headroom

The 0.5 in hex nut torques to 80 in-lb, securing conductors within the 0.85 in by 0.38 in body. It comfortably handles the full 12-10 AWG run range and 16-10 AWG tap range at the rated voltage. The connector runs out when conductors fall outside the stated AWG limits or when a non-copper conductor material is specified.

How it compares

Measured against everything we stock in Wire, Cable & Wiring Supplies, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 92% of the 1,610 comparable items (median $25.99).

Specifications

Product
Brand nameBURNDY
Product typeElectrical Connectors

Questions about this item

What hex nut size and torque does the KS90 split-bolt connector require?

The connector uses a 0.5 in hex nut and should be tightened to 80 in-lb of torque for a secure copper-to-copper connection.

How do I install the split-bolt connector on 12 to 10 AWG run wires and 16 to 10 AWG tap wires?

Insert the stripped run wire and tap wire into the connector body, then tighten the square-head bolt to 80 in-lb; the step often missed is verifying both wires are fully seated before final torque.

Will the unplated copper body need anti-oxidant paste or periodic re-torquing over time?

The unplated copper body is UL 467 and UL 486 A/B listed for direct copper-to-copper use; apply anti-oxidant compound at installation and re-check torque after initial heating cycles.

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