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Westward 6EXL4 drill tap countersink bit 5/16-18 M2 steel uncoated finish

Westward

Westward 6EXL4 Drill/Tap/Countersink Bit 5/16-18 pneumatic accessory

SKU CH-S8JK-C7S7E MPN 6EXL4

Drills, taps and countersinks 5/16-18 threads in M2 steel for pneumatic tools

  • Product typeDrill Accessories
  • Main materialM2 Steel
  • Drills, taps and countersinks in one pass
  • M2 steel construction resists wear during repeated use
  • 5/16-18 UNC thread cuts standard coarse threads
  • 3-1/4 inch overall length reaches deeper holes
  • Bright uncoated finish suits general-purpose applications

5/16-18 Thread Combined Bit

This Westward 6EXL4 accessory combines drilling, tapping and countersinking in one M2 steel tool. It carries a 5/16-18 UNC thread size for matching fasteners. The bright uncoated finish suits general workshop use. California Proposition 65 warnings apply for cancer and reproductive harm.

Suited for single-pass hole prep

Technicians who need to drill, thread and chamfer in one operation will save time with this bit. It is not for buyers who need separate depth control for each step. It is not for users requiring coated cutting edges for extended wear. It is not for applications outside the 5/16-18 thread specification.

5/16-18 UNC thread specification

The 5/16-18 UNC thread size is the single figure that decides fit with the intended fastener. Match this spec exactly to the tapped hole you must produce. The overall length is 3-1/4 inches for reach in standard setups. Verify thread pitch and diameter before purchase.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 90% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameWestward
Model name6EXL4
Product typeDrill Accessories
Size & build
Main materialM2 Steel

Questions about this item

Does the Westward 6EXL4 include any extra bits or lubricant, or is it just the single drill/tap/countersink?

The package contains only the single 5/16-18 UNC drill/tap/countersink bit made from M2 high-speed steel. Cutting fluid or additional bits must be purchased separately.

Should I pick the 5/16-18 UNC version or a different thread size for my application?

Choose the 5/16-18 UNC version when you need to drill, tap and countersink a 5/16 inch coarse-thread hole in one pass; other thread sizes will not match this fastener specification.

What does the 3-1/4 inch overall length mean when the bit is chucked in my pneumatic tool?

The 3-1/4 inch overall length gives you that much reach from the chuck face, so you can access holes up to that depth while the combined drill, tap and countersink profile completes the thread in one operation.

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