100% of Manufacturing is In-House at ARP
The reasoning behind this is best summed up in a quote from Gary Holzapfel, the founder of ARP:
Over the years, we have found, through experience, that the only way to maintain the quality we require is to keep everything in-house. From heading through machining, grinding, heat-treat, thread rolling, and shot-peening to black oxide treatment we perform every operation in house on our own equipment with our own employees.
Some of the fasteners that we manufacture at ARP will mean the difference between winning and losing. The dilemma is that no one ever knows which fasteners will be put in that position.
Therefore, the only way to ensure that every fastener we make meets our quality standards is to peform every operation in-house.
Bolt Manufacture Steps - 100% In-House
There are many steps in the manufacturing process and every step is critical. A misstep can lead to bolt failure. That's why ARP continually invests in best equipment, technology and personnel.
The steps listed below are some of the steps that a given bolt goes through before "ARP" is stamped on the head – your assurance that it has met ARPs rigorous quality standards. Every bolt has a different manufacturing specification, so not every bolt goes through each of these steps.
But you can be guaranteed every step happens under ARP's roof in the hands of an ARP employee!
1. Cutoff from wire or bar stock
2. Heading - hot headed or cold headed based on the material and spec
3. Heat Treat
4. Machining - undercut if called for in the spec
5. Thread Rolling
6. Fillet Rolling - if specified
7. Shot Peening - to remove stress risers
8. Metal Finishing - Black Oxide coated, or in the case of Stainless, polishing
9. Packing - bolts are coated to prevent surface corrosion prior to packing and storage
Stud Manufacture Steps - 100% In-House
There are many steps in the manufacturing process and every step is critical. A misstep can lead to stud failure. That's why ARP continually invests in best equipment, technology and personnel.
The steps listed below are some of the steps that a given stud goes through before "ARP" is stamped on the end – your assurance that it has met ARPs rigorous quality standards. Every stud has a different manufacturing specification, so not every stud goes through each of these steps.
But you can be guaranteed every step happens under ARP's roof in the hands of an ARP employee!
1. Cutoff from wire or bar stock
2. Heat Treat
3. Machining - centerless grinding to ensure concentricity
4. Thread Rolling
5. Shot Peening - to remove stress risers
6. Metal Finishing - Black Oxide coated, or in the case of Stainless, polishing
7. Packing - studs are coated to prevent surface corrosion prior to packing and storage
Nut Manufacture Steps - 100% In-House
While there are not as many steps in the manufacture of a nut, each step is just as critical. If the nut fails, then having a perfectly manufactured bolt doesn't matter.
The steps listed below are some of the steps that a given nut goes through prior to being stamped with "ARP".
But you can be guaranteed every step happens under ARP's roof in the hands of an ARP employee!
1. Cutoff from wire or bar stock
2. Heat Treat
3. Forging
4. Threading
5. Shot Peening - to remove stress risers
6. Metal Finishing - Black Oxide coated, or in the case of Stainless, polishing
7. Packing - nuts are coated to prevent surface corrosion prior to packing and storage
