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
Gray Tools 3198B 12-point combination wrench 3-1/16 inch black oxide finish

Gray Tools

Gray Tools 3198B 12 Point Combination Wrench 3-1/16

SKU CH-RN9N-WD6MA

A 12-point combination wrench sized 3-1/16 inch with a corrosion-resistant black oxide finish that meets ANSI standards

  • Precision 12-point broaching gives a secure grip on fasteners
  • Black oxide coating resists corrosion for longer tool life
  • 3-1/16 inch hex opening fits large industrial hardware
  • Meets ANSI standards for professional reliability
  • Gray Tools quality trusted by mechanics for generations

3198B 12-Point Combination Wrench

This Gray Tools 3198B combination wrench provides a single 3-1/16 inch hex opening with a 12-point drive for secure fastener engagement. A corrosion-resistant black oxide finish protects the tool surface. The wrench meets ANSI dimensional standards for professional use.

Mechanics needing one large 12-point size

Technicians who require a 3-1/16 inch 12-point wrench for specific heavy-duty fasteners will find this tool fits the task. Buyers assembling a full set of incremental sizes should look elsewhere because only this single opening is supplied. Shops needing ratcheting action or offset designs must choose a different style.

12-point drive for 3-1/16 inch hex

The 12-point broached opening is the specification that determines compatibility with 12-point or 6-point fasteners measuring 3-1/16 inch across flats. This geometry allows engagement at finer angles than a 6-point design while maintaining a tight fit. Verify the fastener size and point count before purchase.

Highlights

  • Precision 12-point broaching gives a secure grip on fasteners
  • Black oxide coating resists corrosion for longer tool life
  • 3-1/16 inch hex opening fits large industrial hardware
  • Meets ANSI standards for professional reliability
  • Gray Tools quality trusted by mechanics for generations

Specifications

BrandGRAY TOOLS

Questions about this item

Will the 12 point broaching on the 3198B need re-cutting or replacement over time?

The precision broaching is manufactured to ANSI standards and the black oxide finish resists corrosion, so the wrench does not require re-cutting or scheduled replacement under normal use.

What is the first limit reached when applying sustained torque with this 3-1/16" combination wrench?

The practical limit is the fastener or the operator's leverage; the wrench itself meets ANSI strength requirements and has no internal mechanism to wear out first.

Does the black oxide finish on the 3198B affect heat buildup or handling comfort during all-day use?

The finish is a thin corrosion-resistant coating that does not change thermal conductivity or grip temperature, so heat and comfort are the same as bare steel.

Also in this aisle

People compared these

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