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Bare copper compression lug with long barrel and single half-inch stud hole

Burndy

Burndy YAD4CM12E12 Compression Lug 4 AWG 1/2 in Stud Long

SKU CH-YYNN-PFKR9

One-hole copper compression lug for 4 AWG wire, 1/2 in stud, long barrel, tin-plated, UL 467 listed, rated 600 V and 302 °F

  • TypeElectrical Connectors
  • Rated 600 V for reliable power connections
  • Maximum 302 °F operating temperature suits demanding environments
  • Tin-plated copper contact resists corrosion effectively
  • Long 0.43 in barrel provides secure crimp area
  • UL 467 listed for verified safety compliance

One-hole compression lug for 4 AWG copper

The Burndy YAD4CM12E12 is a single-hole copper compression lug built for 4 AWG wire. Its long barrel measures .43 in with a .41 in outside diameter and a .87 in tongue width. The bare copper barrel is tin-plated and brazed for a solid crimp connection. It is rated for 600 V and a maximum operating temperature of 302 degrees F.

1/2 in stud size fixes the mounting pattern

The lug accepts a 1/2 in stud, which determines the bolt clearance in your bus bar or terminal block. A different stud size would require a different lug, so verify the hardware before ordering. The barrel length and tongue width are set by this stud dimension and the 4 AWG wire range. No adapter or shim can change the stud fit.

UL 467 listing covers grounding and bonding

The connector meets UL 467, the standard for grounding and bonding equipment, so it is accepted for electrical grounding work. No insulation or cover is included, so the installer must provide any required sleeving or tape. Compatible Grainger part numbers 22P219 and 22P221 reference the same specification for cross-checking.

Highlights

  • Rated 600 V for reliable power connections
  • Maximum 302 °F operating temperature suits demanding environments
  • Tin-plated copper contact resists corrosion effectively
  • Long 0.43 in barrel provides secure crimp area
  • UL 467 listed for verified safety compliance

Specifications

BrandBURNDY
TypeElectrical Connectors

Questions about this item

How does the 600 V / 302 °F rating affect real-world use on a 4 AWG copper run?

The lug is rated for 600 V and 302 °F; actual ampacity follows NEC tables for 4 AWG copper and the long brazed barrel provides extra crimp area for a secure connection.

What does the UL 467 listing cover for this connector?

UL 467 certifies the lug for grounding and bonding applications up to 600 V, confirming the tin-plated copper body and crimp termination meet the standard.

Will the 0.87 in tongue and 1/2 in stud hole fit my bus bar or terminal block?

The tongue is 0.87 in wide with a 1/2 in stud hole; the long barrel measures 0.43 in long and 0.41 in outside diameter for crimp-tool clearance.

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