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Westward 4mm hex socket bit, polished chrome finish, 3/8 inch drive

Westward

Westward 54TL58 4mm Metric Hex Socket Bit

SKU CH-MCYH-P84WB

4 mm hex socket bit with 3/8 in. drive, alloy-steel construction and full-polished chrome finish

  • Typesocket
  • Alloy steel construction resists wear during heavy use
  • 4 mm hex tip fits metric fasteners precisely
  • 3/8 inch drive suits standard ratchets and extensions
  • Full polished chrome finish protects against corrosion
  • ASME B18.3.2M-1979 standard confirms dimensional accuracy

4 mm metric hex socket bit

This Westward 54TL58 socket bit fits a 3/8 inch drive and engages 4 mm hex fasteners with a six-point profile. The overall length is 1-3/4 inches and the insert length is 3/4 inches. It is made from alloy steel with a full polished chrome finish and meets ASME B18.3.2M-1979 standards. Intended for mechanics and technicians who need a single metric hex bit for maintenance or assembly tasks.

Fits 3/8 inch drive tools

The bit requires a compatible 3/8 inch drive ratchet, breaker bar or torque wrench to operate. Its standard socket depth allows it to seat on typical hex socket head cap screws without needing deep-well clearance. The compact 1-3/4 inch overall length keeps the working profile short in tight engine bays or machinery. Builders who need a different drive size or a longer reach will need a separate bit.

Alloy steel with chrome finish

The alloy steel construction resists rounding under torque while the polished chrome finish protects against corrosion and eases cleaning. No additional accessories, adapters or software are supplied with this bit. The product carries a California Proposition 65 warning for chemicals known to cause cancer and reproductive harm. Buyers who need a full bit set or multiple tip sizes must purchase those separately.

Highlights

  • Alloy steel construction resists wear during heavy use
  • 4 mm hex tip fits metric fasteners precisely
  • 3/8 inch drive suits standard ratchets and extensions
  • Full polished chrome finish protects against corrosion
  • ASME B18.3.2M-1979 standard confirms dimensional accuracy

Specifications

BrandWESTWARD
Typesocket

Questions about this item

Will the 4 mm hex tip round off under sustained torque?

The tip is machined from alloy steel and hardened to ASME B18.3.2M-1979 tolerances, so it resists rounding during repeated high-torque applications.

Does the chrome finish chip or generate heat during all-day use?

Full polished chrome resists corrosion and reduces friction, keeping the bit cool and the surface intact through continuous operation.

What drive size must my ratchet or impact driver have for this bit?

The bit requires a 3/8 inch square drive socket or adapter to engage properly.

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