Industrial Equipment Used Double End Threaded Bolt Stud

China Industrial Equipment Used Double End Threaded Bolt Stud from Qimao Metal Manufacturer dimensions follow ASME B1.1 unified standards or DIN 13 depending on your spec. The double end design means Class 2A threads on both sides, but we can cut different lengths on each end if your equipment has shallow blind holes on one side and full nuts on the other. Total length tolerance runs ±0.5mm up to 200mm, then ±0.8mm above that. Thread runout gets held to 0.1mm max over the first three threads – that's tighter than what most fastener suppliers bother with. Surface finish sits at 3.2µm Ra on the unthreaded shank, which matters if you're sliding it through close tolerance bores. Heat treatment targets core hardness of 32-38 HRC for most alloy grades, but we can shift that up or down depending on whether you need ductility or wear resistance.

Product Parameter (Specification)

Product Feature

• Cold heading process for Industrial Equipment Used Double End Threaded Bolt Stud instead of cut – fatigue life roughly doubles because grain flow stays continuous around the root

• Heat treated for core hardness between 32-38 HRC on standard alloy grades, but we adjust per your print

• Tighter thread runout – 0.1mm max over first three threads, which beats most catalog specs by about 40%

• Blank center section stays within 0.2mm TIR concentricity, so you don't get flange gasket blowout from wobble

• Double end lengths can differ – tell us your blind hole depth on one side, we'll match it so the stud pulls in evenly

• Traceable lots – every heat number gets recorded, and we hold samples for two years if your ISO auditor asks

Application

• Flange connections on chemical pumps – the 32-38 HRC core resists brinelling from gasket creep over time

• Valve body repairs – when the original Industrial Equipment Used Double End Threaded Bolt Stud tapped hole strips, our stud lets you install a thread insert without scrapping the whole valve

• Gearbox split lines – the tight concentricity keeps the two housing halves aligned during torque up

• Heat exchanger shell covers – phosphate oil coating prevents galling during summer shutdown pullouts

• Compressor cylinder heads – cold formed threads survive the constant tension/compression cycle better than cut threads

• Press frame tie rods – the blank center section gives you a smooth surface for alignment bushings or position sensors

Factory Advantage

We run cold forming for Industrial Equipment Used Double End Threaded Bolt Stud up to M24, then switch to cut threads for larger diameters. Cold forming keeps the grain flow continuous around the thread roots, which means fatigue life roughly doubles compared to cut threads. Our thread rolling dies get replaced after every 50, 000 pieces, not whenever they start slipping – that's why our threads consistently hit 6g or 2A fit without random rejects. The shop floor has a separate heat treat line just for studs, so we never mix them with bolts or pins and lose traceability. Lead time for standard diameters (M6 through M36) runs three weeks, but we keep 200, 000 blanks in common lengths so rush orders can ship in five days. Most suppliers won't stock blanks because it ties up capital; we do it because our customers hate waiting.