Description
S&S Black Oxide Headbolt Kit for M8
- Made from heat-treated 8640 steel
- 200,000 psi ultimate tensile strength
- Stronger than the stock bolts
- Durable black oxide coating
- Formed threads
- Cold-formed 9/16” 12-point head with integral washer
- Reusable
- Sold as a set of 8
Find more ARP bolts Hardware kits for your Harley HERE.
What is a Black Oxide finish?
Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. It is used to add corrosion resistance, for appearance and to minimize light reflection. One of its advantages over other coatings is its minimal buildup; the blacking process creates a layer only about a micrometre thick.
Why are my new ARP bolts oily?
That oil keeps them from corroding and keeps them looking new! You’re a biker…you can’t be afraid to get your hands dirty. (If you are, trade your Harley in for Vespa.) Hot baths of sodium hydroxide, nitrates, and nitrites (at 286 °F) are used to convert the surface of the material into magnetite (Fe3O4). To achieve maximal corrosion resistance the black oxide must be impregnated with oil or wax. Once the process of dipping is completed the top layer of the fastener is porous and a layer of oil is applied, similar to a pickling process. The oil seeps into the material adding that extra corrosion resistance to rust.
Will they rust?
Black Oxide adds a layer of corrosion and abrasion resistance to fasteners. Like any material, black oxide treated fasteners can rust in the right environments. It will depend on if the fastener is damaged or marred, the type of metal with the black oxide treatment and environmental conditions. In high heat environments, the oil residue that stays on the fasteners will begin to turn brown. Many users find their bolts look like they rust prematurely when really, the oil is just changing colors. See the next Q&A to learn how to bring them back to looking new if they begin to show rust.
Do they require maintenance?
Like any treated, chromed or painted surface, they do require some maintenance. It’s simple and takes only a few minutes! To keep your black oxide hardware looking good and new on your bike, they must be oiled. We recommend spraying WD-40 on a rag and wiping the surface of the hardware whenever you clean your bike. Don’t wait for them to look bad before doing something. A quick swipe with WD-40 every now and then will keep them looking brand new and prevent corrosion. We use Silikroil around the shop which we prefer over WD-40. You can find it on Amazon. In hot, rainy or humid environments, they may require more frequent maintenance.
Fits:
| 2020-2021 | Harley-Davidson | Softail Standard FXST | – | – |
| 2020-2021 | Harley-Davidson | Softail Low Rider S FXLRS | – | – |
| 2020-2021 | Harley-Davidson | Road Glide Limited FLTRK | – | – |
| 2020-2021 | Harley-Davidson | CVO Tri Glide FLHTCUTGSE | – | – |
| 2019-2021 | Harley-Davidson | Electra Glide Standard EFI FLHTI | – | – |
| 2019-2020 | Harley-Davidson | FXDR 114 | – | – |
| 2018-2021 | Harley-Davidson | Softail Heritage Classic 114 FLHCS | – | – |
| 2018-2021 | Harley-Davidson | Softail Slim FLSL | – | – |
| 2018-2021 | Harley-Davidson | Softail Street Bob FXBB | – | – |
| 2018-2021 | Harley-Davidson | CVO Road Glide Custom FLTRXSE | – | – |
| 2018-2021 | Harley-Davidson | Softail Fat Bob 114 FXFBS | – | – |
| 2018-2021 | Harley-Davidson | Softail Fat Boy 114 FLFBS | – | – |
| 2018-2021 | Harley-Davidson | Softail Heritage Classic FLHC | – | – |
| 2018-2021 | Harley-Davidson | Softail Sport Glide FLSB | – | – |
| 2018-2020 | Harley-Davidson | Softail Breakout 114 FXBRS | – | – |
| 2018-2020 | Harley-Davidson | Softail Deluxe FLDE | – | – |
| 2018-2020 | Harley-Davidson | Softail Low Rider FXLR | – | – |
| 2018-2019 | Harley-Davidson | Softail Breakout FXBR | – | – |
| 2018-2019 | Harley-Davidson | Softail Fat Bob FXFB | – | – |
| 2018-2019 | Harley-Davidson | Softail Fat Boy FLFB | – | – |
| 2017-2021 | Harley-Davidson | CVO Street Glide FLHXSE | – | – |
| 2017-2021 | Harley-Davidson | Street Glide EFI FLHX | – | – |
| 2017-2021 | Harley-Davidson | Electra Glide Ultra Limited FLHTK | – | – |
| 2017-2021 | Harley-Davidson | Road Glide Special FLTRXS | – | – |
| 2017-2021 | Harley-Davidson | Tri Glide Ultra Classic FLHTCUTG | – | – |
| 2017-2021 | Harley-Davidson | Road King EFI FLHR | – | – |
| 2017-2021 | Harley-Davidson | Road Glide Custom FLTRX | – | – |
| 2017-2021 | Harley-Davidson | Street Glide Special FLHXS | – | – |
| 2017-2021 | Harley-Davidson | Road King Special FLHRXS | – | – |
| 2017-2021 | Harley-Davidson | Freewheeler FLRT | – | – |
| 2017-2021 | Harley-Davidson | CVO Electra Glide Ultra Limited FLHTKSE | – | – |
| 2017-2020 | Harley-Davidson | Electra Glide Police FLHTPI | – | – |
| 2017-2019 | Harley-Davidson | Road Glide Ultra FLTRU | – | – |
| 2017-2019 | Harley-Davidson | Electra Glide Ultra Limited Low FLHTKL | – | – |
| 2017-2019 | Harley-Davidson | Electra Glide Ultra Classic EFI FLHTCUI |
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