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Copper compression lug, one-hole, tin-plated, 4 AWG, pack of 50

3M

3M 30018 One-Hole Lug Compression Connector 4 AWG PK50

SKU CH-BBN8-C0HWW

Copper one-hole lug compression connector for 4 AWG cable, #10 stud, tin-plated barrel, pack of 50

  • Main materialCopper
  • Copper construction ensures high conductivity for reliable electrical connections
  • Tin plating resists corrosion to maintain performance over time
  • 4 AWG cable size handles substantial current loads in automotive systems
  • One-hole lug design simplifies installation with standard #10 stud compatibility
  • Pack of 50 connectors provides ample supply for multiple wiring projects

3M 30018 Lug Connector 4 AWG

The 3M 30018 is a one-hole compression lug built from copper with a tin plate finish. It accepts 4 AWG cable and uses a standard tongue style with a gray colour code. Each connector features a short barrel length of 1.94 in and a #10 stud hole centred 0.375 in from the end. The pack contains fifty units.

Suits 4 AWG copper terminations

Installers terminating 4 AWG copper wire to a #10 stud will find the correct die code 8 and 95 dimensions here. The straight barrel and peep-hole-free design fit standard compression tooling. Buyers needing a two-hole lug, a different stud size or a cable gauge other than 4 AWG should select another part.

#10 stud size with 0.375 in centre

The connector mounts on a #10 stud with the hole centre positioned 0.375 in from the barrel end. This single dimension determines whether the lug aligns with the busbar or terminal block drilling pattern. Verify the stud size and centre-to-end measurement before ordering.

How it compares

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

Price $217.99
Pricier than about 91% of the 1,040 comparable items (median $13.99).

Specifications

Product
Brand name3M
Size & build
Main materialCopper

Questions about this item

Will the 4 AWG copper lugs need re-crimping after thermal cycling?

The copper barrel is designed for a single compression crimp using die code 8; no routine re-crimping is required unless the connection is physically disturbed.

What stops me from running maximum current continuously through the #10 stud hole?

The 0.375 in hole centre-to-end distance and 0.49 in tongue width limit heat dissipation, so ampacity follows the 4 AWG conductor rating rather than the lug itself.

How hot does the tin-plated barrel get during all-day load?

Temperature rise depends on the 4 AWG wire’s current and ambient conditions; the short 1.94 in barrel and tin plating add no extra thermal resistance beyond the conductor.

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