Bonding ClampsMarathon “K” Series Bonding Clamps are used to bond 1/4” and 5/16” galvanized strand to #6AWG copper ground wire.

• MARK1 Bonding Clamp is a plated bronze clamp with plating removed from one groove of clamp for steel strand to copper or copper bonded steel wire applications.

• MARK2 Bonding Clamp is bronze plated on either groove for aluminum or galvanized steel strand to aluminum or galvanized steel strand applications.

• MARK3 Bonding Clamp is not plated for copper to copper wire applications.

• MARKUL Bonding Clamp is used for all aluminum, steel and copper conductor applications. It is made of two mating copper alloy castings secured by a silicone bronze bolt.


Part Number Description Conductor Range U/MStd. Pkg. Qty.Pkg. Wt. (lbs)
MARK1 Clamp, Bonding Strand to Copper Bond6 sol - ¼”, 5/8” Guy strandEA507.5
MARK2 Clamp, Bonding Jumper Al/Steel Strand to Al/Steel Strand 6 sol - ¼”, 5/8” Guy strandEA507.5
MARK3 Clamp, Bonding Jumper Copper to Copper Bond 6 sol - ¼”, 5/8” Guy strandEA507.5
MARKUL* Clamp, Bonding Jumper UL* All Al/Cu/Steel Conductors6 sol - ¼”, 5/8” Guy strand EA507.5

*UL Listed; CU 90°C UL467 Grounding & Bonding / US & Canada