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Hexagonal carbon steel threading die bright finish 5/16-18 UNC

Cleveland Golf

Cleveland Golf C65603 5/16-18 Hex Die pneumatic accessory

SKU CH-THP3-FT7VQ MPN C65603

A carbon steel hex die cuts 5/16-18 UNC threads with a 0.6188 in hex size

  • Product typeDies & Taps
  • Main materialCarbon
  • Thread 5/16-18 bolts cleanly with UNC standard
  • Carbon steel die resists wear during rethreading
  • 11/16 in outside diameter fits standard wrenches
  • Hex shape allows socket or wrench drive
  • Right-hand thread direction matches common fasteners

Hex rethreading bolt die

The Cleveland Golf C65603 is a hex die designed to repair damaged 5/16-18 UNC threads. Made from carbon steel with a bright machined finish, it restores external threads on bolts or studs. The solid hex body allows use with a standard wrench or socket. It is intended for maintenance and repair tasks where existing threads need cleaning or reforming.

Who this suits and who it does not

This die suits technicians and DIY users who need to chase or renew right-hand UNC threads of this specific pitch and diameter. It will not help buyers who require a tapping tool for cutting new internal threads in a hole. It is also not for anyone working with metric, fine-pitch, left-hand or larger-diameter thread forms.

Deciding specification

The thread specification is 5/16-18 UNC, right-hand, with an 11/16 inch outside diameter and a 5/16 inch die thickness. The hex size measures .6188 inch across flats. Match these figures exactly to the fastener you are repairing; any mismatch means this die cannot do the job.

How it compares

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

Price $16.99
Cheaper than about 70% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCleveland
Model nameC65603
Product typeDies & Taps
Size & build
Main materialCarbon

Questions about this item

What size bolt or stud does the 5/16-18 hex die rethread?

The die cuts 5/16 inch diameter threads with 18 threads per inch, matching standard UNC coarse bolts of that size.

Will the 11/16 inch outside diameter fit the die stock or wrench I already own?

The hex die measures 11/16 inch across flats, so it fits any die stock or adjustable wrench that accepts that hex size.

How can I confirm the C65603 die is cutting clean threads after setup?

Run a matching 5/16-18 nut onto the rethreaded bolt; it should turn smoothly without binding across the full length.

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