Keystone Capabilities
At Keystone, we’re proud to be a leading producer of precision roll threaded products, specializing in Acme, trapezoidal, and unified form threads as well as large diameter threading. We have unparalleled experience and capabilities and produce quality, long-lasting components that stand the test of time. Our materials include carbon steel, alloy steel, stainless steel (303, 304, 316), brass, bronze, aluminum, and exotic metals.
We offer national course, fine, and Acme threads as aggressive as 1.5 pitch in addition to metric and trapezoidal threads. Threads can be right or left hand. Additionally, our CNC department can machine bar ends to your specifications. We make an assortment of hex, round, and cylindrical nuts to mate with our threaded rod as well as special screws and nuts to meet our customer needs.
Rolled Thread Part Dimensions
We can roll thread rods ranging from ¼ inch to 20 inches in diameter. There is no limit on threaded rod length, although our most common lengths are between 12 feet and 24 feet in overall length.
Tightest Tolerances for Lead Accuracy
Standard lead accuracy for Acme-2C is within 0.7 MIL per inch (0.0007/1). This tolerance is eased somewhat for the Acme 2-G, which is maintained within 1 MIL per inch (0.001/1). For pitch diameter tolerance, we often manufacture 3A grade threads, which often require as low as 3 MIL total allowance.
Thread Rolling Materials at Keystone
Material Grades
- Carbon Steel: 1018, 1215, 1045, B7
- Stainless Steel: 303 CRES, 304 CRES, 316 CRES, 17-4PH
- Inconnel Superalloy
- 6061 Aluminum Alloy
- 360 Brass Alloy
Material Finish
- Plain (uncoated)
- Black Phosphate
- Galvanized
- Yellow Zinc
- Bright Nickel
- Black Oxide
- Clear Zinc
- Nickel Plate
- Teflon Coat
- Zinc Phosphate
- Cadmium Plate
- Xylon Coat
Specifications
LENGTH:
- Thru feed maximum: 50 feet
- In feed maximum: 16 inches
DIAMETER: .25 inch to 20 inches
PITCH: 1.5 to 32 threads per inch
Rockwell Hardness: Up to 35C
Stocked Lengths: 3, 6, 12 feet • 1, 3 meters
Thread Forms
At Keystone Threaded Products, we offer endless threading possibilities, from .25- to 20-inch diameter products and 1.5- to 32-inch pitch capacity.
- Acme (precision, general purpose, stub, single starts, multiple starts)
- Trapezoidal
- Metric
- UNC
- UNF
- UNEF
- 8 Pitch
- Right hand/Left hand
Secondary Machining Capabilities
We have secondary machining capabilities in house as well as a network of strategic partners fully vetted by our production team. Our capabilities include:
CNC Turning Capacity
Bar diameter: 2.5 inches max
Length capacity: 50 feet max
Chucking diameter: 12 inches max
Specialty Turing Capacity
Diameter: .25 inch to 8 inches
Length: 30 feet max
Secondary Capabilities
- Drilling
- Tapping
- Turning
- Grinding
- Milling
- Keyways and slots
- Straightening
- Heat treating
- Plating (zinc, HDG, black oxide, chrome)
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