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Pack of ten copper compression lugs, two-hole straight tongue, black color code, transparent packaging

3M

3M 31137 Two Hole Compression Lug 2/0 AWG Pack of 10

SKU CH-7PCT-Y0437

Two-hole copper compression lug for 2/0 AWG stranded wire, 35 kV rated, seamless barrel, 1.75 in hole spacing, pack of 10

  • Product typeElectrical Connectors
  • Product colorTransparent
  • Pack of 10 lugs simplifies multi-connection jobs
  • Two-hole design with 1.75 in spacing secures heavy cable
  • Seamless copper barrel resists cracking under compression
  • Rated to 35 kV for high-voltage solar arrays
  • Black colour code and die code 100 speed correct crimp selection

3M 31137 Two-Hole Copper Compression Lug

This 3M 31137 lug provides a crimp termination for 2/0 AWG stranded copper conductors. The seamless copper barrel accepts a 100 / 13 die code and carries a 35 kV maximum voltage rating. Supplied in a pack of 10 pieces, each lug features a straight tongue with two mounting holes spaced 1.75 in apart.

Installers terminating 2/0 AWG copper

These lugs suit electrical contractors and solar installers who need a straight, dual-hole copper connector for 2/0 AWG wire. They do not suit applications requiring an inspection window, a different stud size, or a barrel sized for other wire gauges. Buyers needing aluminium conductor compatibility or alternative tongue angles should select a different part.

Two-hole pattern with 1.75 in centre spacing

The 1.75 in hole centre-to-centre distance is the critical dimension that determines whether this lug matches the busbar or equipment drilling pattern. Verify this spacing against the mounting surface before ordering. The 0.81 in tongue width and 1/2 in stud size must also align with the hardware being used.

How it compares

Measured against everything we stock in Solar-Powered Chargers & Devices, at today’s prices. Recalculated every night.

Price $116.99
Pricier than about 90% of the 874 comparable items (median $25.99).

Specifications

Product
Brand name3M
Product typeElectrical Connectors
Product colorTransparent

Questions about this item

Will the 2/0 AWG copper crimp on these 31137 lugs need re-crimping after thermal cycling?

The seamless copper barrel and crimp termination are designed for a permanent joint; no scheduled re-crimp is required if the original compression used die code 100.

What stops me from pushing more than 35 kV through these connectors?

The maximum voltage rating is 35 kV; exceeding it risks insulation breakdown on the transparent barrel.

How hot do the barrels get when carrying full load all day?

Temperature rise depends on conductor ampacity and ambient conditions; the lug itself adds negligible resistance when crimped to 2/0 AWG copper with die code 100.

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