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Kromite® Threaded Bar

Heat Treated, Roll Threaded Rod

Kromite Threaded Bar is made of heat treated, high strength, alloy material. It is the ideal threaded rod to be used when strength and toughness are key requirements.

Kromite Threaded Bars are manufactured with a rolled thread vs. a cut thread. This product is virtually free of tears, chatter marks and tool marks that are commonly associated with cut threads. Such imperfections in cut threads are points of stress that cause fatigue failure in service. Consider Kromite Bar for your maintenance needs.

Material conforms to specifications for: ASTM A193, Grade B7.

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Features

Heat Treated
High Strength – Alloy Material
Rolled Threads vs Cut Threads
Excellent Toughness
Creep Resistant
Consistent Grain Structure
High Degree of Accuracy
Precision Class 2A & 2G Fit

Agency Concurrence

ASTM A193, Grade B7

Lengths

10/12 Ft. R/L and Custom Cuts

Typical Properties*

Hardness321 BHN
Tensile 155,000 P.S.I.
Yield135,000 P.S.I.
Grain Size 7
Elongation in 2″ 19%
Reduction of Area53%

Available Sizes

National Coarse

  • THREADED 1-1/8 – 7 NC
  • THREADED 1-1/4 – 7 NC
  • THREADED 1-3/8 – 6 NC
  • THREADED 1-1/2 – 6 NC
  • THREADED 1-5/8 – 5-1/2 NC
  • THREADED 1-3/4 – 5 NC
  • THREADED 2 – 4-1/2 NC
  • THREADED 2-1/4 – 4-1/2 NC
  • THREADED 2-1/2 – 4 NC
  • THREADED 1/4 – 20 NC
  • THREADED 5/16 – 18 NC
  • THREADED 3/8 – 16 NC
  • THREADED 7/16 – 14 NC
  • THREADED 1/2 – 13 NC
  • THREADED 9/16 – 12 NC
  • THREADED 5/8 – 11 NC
  • THREADED 3/4 – 10 NC
  • THREADED 7/8 – 9 NC
  • THREADED 1 – 8 NC

National Fine

  • THREADED 1/4 – 28 NF
  • THREADED 5/16 – 24 NF
  • THREADED 3/8 – 24 NF
  • THREADED 7/16 – 20 NF
  • THREADED 1/2 – 20 NF
  • THREADED 9/16 – 18 NF
  • THREADED 5/8 – 18 NF
  • THREADED 3/4 – 16 NF
  • THREADED 1/4 – 28 NF
  • THREADED 5/16 – 24 NF
  • THREADED 3/8 – 24 NF
  • THREADED 7/16 – 20 NF
  • THREADED 1/2 – 20 NF
  • THREADED 9/16 – 18 NF
  • THREADED 5/8 – 18 NF
  • THREADED 3/4 – 16 NF

Acme

  • THREADED 1/4 – 28 NF
  • THREADED 5/16 – 24 NF
  • THREADED 3/8 – 24 NF
  • THREADED 7/16 – 20 NF
  • THREADED 1/2 – 20 NF
  • THREADED 9/16 – 18 NF
  • THREADED 5/8 – 18 NF
  • THREADED 3/4 – 16 NF
  • THREADED ACME 3/8 – 12
  • THREADED ACME 1/2 – 10
  • THREADED ACME 5/8 – 6
  • THREADED ACME 5/8 – 8
  • THREADED ACME 3/4 – 6
  • THREADED ACME 3/4 – 8
  • THREADED ACME 7/8 – 6
  • THREADED ACME 1 – 4
  • THREADED ACME 1 – 5
  • THREADED ACME 1 – 8
  • THREADED ACME 1-1/8 – 4
  • THREADED ACME 1-1/8 – 5
  • THREADED ACME 1-1/4 – 4
  • THREADED ACME 1-1/4 – 5
  • THREADED ACME 1-3/8 – 4
  • THREADED ACME 1-1/2 – 4
  • THREADED ACME 1-1/2 – 5
  • THREADED ACME 1-3/4 – 4
  • THREADED ACME 2 – 4
  • THREADED ACME 2-1/4 – 4
  • THREADED ACME 2-1/2 – 4

Metric

  • 4MM (.7)
  • 5MM (.8)
  • 6MM (1.00)
  • 8MM (1.25)
  • 10MM (1.50)
  • 12MM (1.75)
  • 14MM (2.00)
  • 16MM (2.00)
  • 18MM (2.50)
  • 20MM (2.50)
  • 22MM (2.50)
  • 24MM (3.00)
  • 27MM (3.00)
  • 30MM (3.50)
  • 33MM (3.50)
  • 36MM (4.00)
  • 39MM (4.00)

Eight Pitch

  • THREADED 1-1/8 – 8
  • THREADED 1-1/4 – 8
  • THREADED 1-3/8 – 8
  • THREADED 1-1/2 – 8
  • THREADED 1-5/8 – 8
  • THREADED 1-3/4 – 8
  • THREADED 2 – 8
  • THREADED 2-1/2 – 8

The strength of our threaded bar is in the rolling process. Thread rolling deforms the blank material as it is forced along the contour of the die. The worked material is strain hardened, resulting in a product stronger and harder with minimal risk of fatigue relative to cut threads.

Consider Kromite® Threaded Bar

As a suitable upgrade where maintenance applications require improved strength, durability, creep resistance and overall performance.

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