Split Bolt Connectors

Copper split bolt connectors, 8 AWG through 500 kcmil — high-strength copper-alloy bodies, 600 V / 90°C, UL 486A/B and UL 467 class, suitable for direct burial in earth or concrete. Ten sizes cover the same breaks as ILSCO Type IK and cross directly to Burndy SERVIT® KS, Blackburn Type H, and NSI N-series. Stocked; same-day shipping by 2PM ET; trade accounts on Net-30.

Sizing: pick by the larger conductor first — the run must sit inside the connector's equal main and tap range — then confirm the tap is at or above the minimum tap figure. Copper-alloy split bolts are for copper and copperweld only; aluminum or Cu/Al work needs a dual-rated body with a spacer. Torque to the marked value and insulate to the conductor rating per NEC 110.14(B).

Where they belong: service and feeder taps in troughs and wireways, bonding jumpers, accessible grounding electrode conductor taps, ground bars, temporary power, and repair splices. Where they don't: buried or encased GEC splices — NEC 250.64(C)(1) requires irreversible compression or exothermic weld there.

Cross-reference — copper split bolts

CT Part	Equal main & tap	Min tap	Burndy KS	ILSCO IK	Blackburn H	NSI	Torque
610-00812	8 STR–12 SOL	16	KS15	IK-8N / IK-8	8H, 8H3	N-8*	80 in-lb
610-00610	6–10 SOL	16	KS17	IK-6N / IK-6	6H3, 6H	N-6	165
610-0048	4–8 SOL	16	KS20	IK-4N / IK-4	4H	N-4*	165
610-00261	2 STR–6 SOL	14	KS22, KS23	IK-2N / IK-2	1H	N-2*	275
610-00104	1/0 STR–4 SOL	14	KS25	IK-1/0N / IK-1/0	10H	N-1/0*	385
610-00204	2/0 STR–2 SOL	14	KS26	IK-2/0	20H	N-2/0*	385
610-00302	3/0 STR–2 SOL	12	KS27	IK-3/0	30H	N-3/0*	500
610-25001	250 kcmil–1/0	10	KS29	IK-250	40H	N-250	650
610-35040	350 kcmil–4/0	8	KS31	IK-350	350M	N-350*	650
610-00500	500–250 kcmil	8	KS34	IK-500	500M	N-500*	825

Crosses identify copper-alloy split bolts of equivalent published range on the same UL 486A basis; dual-rated Cu/Al bodies (Burndy KSU, ILSCO SK, Blackburn HPS/HPW) are a separate class. *NSI numbers follow the family's max-size naming; verify on datasheet. Torque values are for maximum conductors — follow the marking on the connector.

Guides: Split Bolt Connectors: Sizing, Torque, Taping, and Where the NEC Won’t Let You Use One · Split Bolt Cross-Reference Chart · Contractor & distributor pricing →