Split Bolt Connectors

Copper split bolt connectors, 8 AWG through 500 kcmil — high-strength copper-alloy bodies, 600 V / 90°C, UL 467 listed, manufactured by Indian Metals Solutions, UL File E532634, 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. Plain copper-alloy split bolts are for copper and copperweld conductors; our tin-plated split bolts are AL/CU rated for aluminum and copper conductors, so use those for aluminum or Cu/Al work. 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 plain copper-alloy split bolts of equivalent published range; dual-rated Cu/Al bodies (Burndy KSU, ILSCO SK, Blackburn HPS/HPW) are not crossed in this table. Our tin-plated split bolts are the AL/CU-rated (aluminum and copper) option; the plain copper split bolts listed here are for copper. *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 →