Black Headbolt Kit for M8

$139.00

Description

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 Hardware kits for your Harley HERE.

arp hardware for harleys

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 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:

2017 – 2019 Harley-Davidson CVO Electra Glide Ultra Limited FLHTKSE
2018 – 2019 Harley-Davidson CVO Road Glide Custom FLTRXSE
2017 – 2019 Harley-Davidson CVO Street Glide FLHXSE
2017 – 2019 Harley-Davidson Electra Glide Police FLHTPI
2019 Harley-Davidson Electra Glide Standard EFI FLHTI
2017 – 2019 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI
2017 – 2019 Harley-Davidson Electra Glide Ultra Limited FLHTK
2017 – 2019 Harley-Davidson Electra Glide Ultra Limited Low FLHTKL
2017 – 2019 Harley-Davidson Freewheeler FLRT
2019 Harley-Davidson FXDR 114
2017 – 2019 Harley-Davidson Road Glide Custom FLTRX
2017 – 2019 Harley-Davidson Road Glide Special FLTRXS
2017 – 2019 Harley-Davidson Road Glide Ultra FLTRU
2017 – 2019 Harley-Davidson Road King EFI FLHR
2017 – 2019 Harley-Davidson Road King Special FLHRXS
2018 – 2019 Harley-Davidson Softail Breakout 114 FXBRS
2018 – 2019 Harley-Davidson Softail Breakout FXBR
2018 – 2019 Harley-Davidson Softail Deluxe FLDE
2018 – 2019 Harley-Davidson Softail Fat Bob 114 FXFBS
2018 – 2019 Harley-Davidson Softail Fat Bob FXFB
2018 – 2019 Harley-Davidson Softail Fat Boy 114 FLFBS
2018 – 2019 Harley-Davidson Softail Fat Boy FLFB
2018 – 2019 Harley-Davidson Softail Heritage Classic 114 FLHCS
2018 – 2019 Harley-Davidson Softail Heritage Classic FLHC
2018 – 2019 Harley-Davidson Softail Low Rider FXLR
2018 – 2019 Harley-Davidson Softail Slim FLSL
2018 – 2019 Harley-Davidson Softail Sport Glide FLSB
2018 – 2019 Harley-Davidson Softail Street Bob FXBB
2017 – 2019 Harley-Davidson Street Glide EFI FLHX
2017 – 2019 Harley-Davidson Street Glide Special FLHXS
2017 – 2019 Harley-Davidson Tri Glide Ultra Classic FLHTCUTG

 

Additional information

Weight .5 lbs
Dimensions 4 × 4 × 1 in

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