We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
CRAFTSMAN deep socket, 3/8-inch drive, 7/8-inch, 6-point, full polish chrome finish

CRAFTSMAN Deep Socket SAE 3/8-Inch Drive 7/8-Inch 6-Point CMMT43339

SKU CH-519Z-479GA

Deep 3/8-inch drive socket fits 7/8-inch SAE fasteners with six-point grip and polished chrome finish

  • MaterialSteel
  • Selling UnitBox
  • Item Count1 pack
  • Compatibility/FitmentOut-Opening, Narrow Stile, Store Front Doors
  • Standards/CertificationsADA Compliant
  • Full polish chrome finish resists corrosion
  • 6-point design increases torque on fasteners
  • Large markings enable quick size identification
  • Meets or exceeds ASME specifications
  • Full lifetime warranty provides long-term confidence

Deep SAE Socket for 3/8-Inch Drive

The CRAFTSMAN CMMT43339 is a 7/8-inch deep socket built for 3/8-inch drive ratchets. Its 6-point geometry engages the flats of a fastener to deliver higher torque without rounding corners. A full polish chrome finish resists corrosion in shop environments. Large markings allow quick size identification during service work.

Thermals Noise and Power Draw

As a hand tool the socket generates no heat, noise or electrical draw during normal use. The steel construction absorbs impact loads without deformation. Polished surfaces reduce friction when turning fasteners by hand or with a ratchet. No external power source is required for operation.

Upgrade Path and Compatibility

This socket replaces worn or missing 7/8-inch 6-point deep sockets in a 3/8-inch drive set. It fits fasteners with a .375 inch compatible dimension. The deep profile reaches recessed bolts that standard sockets cannot engage. Buyers needing other drive sizes or metric dimensions will require additional sockets.

Highlights

  • Full polish chrome finish resists corrosion
  • 6-point design increases torque on fasteners
  • Large markings enable quick size identification
  • Meets or exceeds ASME specifications
  • Full lifetime warranty provides long-term confidence

Specifications

BrandDeWalt
ModelHand Rivet Nut Setter Kit
MaterialSteel
Selling UnitBox
Item Count1 pack
Compatibility/FitmentOut-Opening, Narrow Stile, Store Front Doors
Standards/CertificationsADA Compliant
Part NumberCMMT43339

Questions about this item

How do I attach the 3/8-inch drive socket to my ratchet, and what step is often missed?

Align the square drive on the socket with the ratchet anvil and press until the detent ball clicks into the socket groove; the step people skip is verifying that click, which prevents the socket from falling off under load.

What maintenance will the chrome finish need over time?

Wipe the socket clean after each use and apply a light coat of machine oil to the polished surface; this preserves the corrosion resistance noted in the specifications and keeps the large size markings legible.

At what point does the 6-point design reach its limit during sustained high-torque work?

The 6-point geometry contacts fastener flats rather than corners, so the first limit is fastener rounding or bolt stretch before the socket itself deforms, provided torque stays within the .375 inch compatible fastener range.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.