Special and Standard Stud Bolts for OEMs and Distributors
Kelko Products manufactures a complete line of special as well as standard stud bolts for both OEMs and distributors. Our custom stud bolts are durable and can be made resistant to corrosion. We have the capability to manufacture stud bolts with diameters ranging from 1/4" through 2". Our stud bolts are available in a range of carbon steel & stainless steel grades plus silicon, bronze, and Monel®.
We also stock color-coded materials in different SAE J429 and ATSM grades. Stud bolts can be precision machined to have different types of threads, including UNC, UNF, 5HF, NPT, and Metric 6g. Our custom milling, turning, thread rolling, and threading capabilities enable us to manufacture fully threaded studs or studs threaded only at the ends. Bolts can be plated with specific materials according to your application requirement.
As an FQA compliant fastener manufacturer, Kelko Products conducts chemical and physical tests on custom-machined stud bolts in an independent testing lab. A comprehensive collection of rings and set plugs is used to continuously check the thread quality of all stud bolts. In addition to gages, we also utilize a 30" optical comparator to inspect key thread parameters of stud bolts.
Types of Studs
Double End Studs, Shoulder Studs, and Tap End Studs
1018 Low Carbon Steel
1045 Medium Carbon Steel
1117 Low Carbon Steel
1137 Low Carbon Steel
1141 Heat Treated Medium Carbon Steel
1141 Medium Carbon Steel
1213 Low Carbon Steel
1215 Low Carbon Steel
12L15 Low Carbon Steel
303 Stainless Steel
304 Stainless Steel
410 Stainless Steel
4140 Heat Treated High Carbon Steel
4140 High Carbon Steel
416 Stainless Steel
655 Silicon Bronze
ASTM A193 Grade B7 High Carbon Steel
ASTM A193 Grade B7M High Carbon Steel
ASTM A193 Grade B8 316 Stainless Steel
ASTM A193 Grade B8CL2 316 Stainless Steel
ASTM A193 Grade B8M 316 Stainless Steel
ASTM A193 Grade B8MCL2 316 Stainless Steel
ASTM A307 grade A Low Carbon Steel
ASTM A354 Grade BC High Carbon Steel
ASTM A354 Grade BD High Carbon Steel
ETD-150 High Carbon Steel
Fatigueproof Specialty Alloys
Grade 5 Medium Carbon Steel
SAE J429 Grade 5 Medium Carbon Steel
SAE J429 Grade 8 High Carbon Steel
Stressproof Specialty Alloys
Black Manganese Phosphate
Cadmium & Clear
Cadmium & Yellow
Hot Dip Galvanized
Plain – No Finish
Thread Lock Patch
Zinc Chromate (Clear, Blue, Yellow, Green)
Zinc Iron & Yellow
Stud Bolt Diameter (Round or Hex)
Stud Bolt Diameter (Metric Dimensions)
Threading Capacity Up To 20 ft.
We specialize in short runs and minimal lead times for single piece or 10,000 parts
Capabilities & Equipment List
Milling (Wrench Flats & Other Flats)
Slotting (Vent & Screw Driver)
Turning (Hex Body & Round Ends)
Turning (Multiple Diameters on one Part)
(16) A-25 Traubs 1/4" dia. thru 1"
(3) Brown & Sharpe 2G 1/2" dia. thru 1-1/4" dia
(1) WAGNER WA70 Cold Saw
5/16" dia. thru 2-1/2" dia.
6" up to 40" long
(1) HARDINGE Conquest 51 2-5/8" dia x 22"
(2) HARDINGE Conquest T42 1-1/2" dia. x 13"
(1) HARDINGE Conquest GT 1" dia. x 11"
(2) Vertical Milling Machines
Drilling, Slotting, & Wrench Flats
(1) LANDIS Double Spindle Threading Machine 2" dia.
(2) LANDIS Double Spindle Threading Machines 1-1/2" dia.
(17) Custom-built Threading Machines 1/4" thru 1" dia.
(1) Custom Thread Rolling Machine 1/4" dia. thru 5/8" dia.
(3) Tesker Roll Threaders
Custom-built Stamping Machines
Customer Identification Marking
Extensive Collection of Ring Gages & Set Plugs
STARRETT Tri-Roll Gages & Full-form Gages
(1) 30" Optical Comparator
Actual Chemical and Physical Properties Reported by an Independent Testing Laboratory
Certification of Compliance to Drawings, Specifications, or Material
Certifications to a Specified Standard (ASME, ASTM, SAE J429, etc.)
Original Mill Certifications