Fastener Kits, Black Oxide Stainless Steel

Why buy a kit instead of loose sizes?

The reason is simple: most jobs do not use one size, and guessing which size you need before you start is how you end up short mid-project. A kit gives you a graded range in a single organized box, so the size you reach for is there, and the leftovers become the start of a stocked drawer for the next job. On black oxide hardware that convenience matters a little more, because matching a black finish across mixed loose orders is fussy, and a kit guarantees the whole assortment shares the same look. Several kits also solve the matching-component problem directly by including the nuts or cup washers that pair with the screws, so a machine-screw kit with nuts or a screw-and-cup-washer set arrives as a complete fastening solution rather than parts to assemble from separate orders. Underneath the finish, these are stainless, so the whole kit carries the corrosion resistance of the base metal, not a coating that chips.

What the kits include

• Machine screw kits, a graded range of black oxide stainless machine screws, some with matching nuts
• Sheet metal screw kits, an assortment of self-tapping black oxide stainless screws
• Finishing washer kits, black oxide stainless cup washers for a neat countersunk finish
• Screw and washer sets, screws paired with cup washers as a complete solution
• All on a stainless base, so the finish is cosmetic and the metal resists corrosion

Why choose black oxide stainless kits

• A range of sizes in one organized box
• Uniform matte-black finish across the whole assortment
• Stainless base resists corrosion, unlike black-coated steel
• Several kits include matching nuts or cup washers
• Leftovers stock a drawer for the next job

Common applications

• Mixed-size jobs where you cannot predict every size needed
• Visible and anti-glare hardware wanting a uniform black look
• Electronics, audio, and equipment assembly
• Design-led and architectural fittings
• Workshop and maintenance stock
• Any project needing a spread of black oxide stainless sizes

Black Oxide Stainless Kit FAQs

What sizes are in a kit?

Each kit holds a graded range of sizes for its fastener type, so you have several options on hand rather than a single size. The exact spread is listed on the individual kit; the idea is to cover the common sizes a job runs through.

Do the kits include nuts or washers?

Some do. There are machine screw kits with matching nuts and screw kits paired with cup washers, arriving as a complete fastening solution. Others are a screw-only assortment. Check the individual kit for its contents.

Are these corrosion resistant?

Yes, through the stainless base. The black oxide is a finish adding mild resistance; in severe salt the thin oxide can show surface rust that washes off, with the stainless protecting the fasteners.

Why choose a black oxide kit over black-coated steel?

Black-coated carbon steel rusts where the coating chips or a driver marks it. These are stainless underneath, so the black is cosmetic and the fasteners resist corrosion despite handling.

Can I reorder individual sizes from a kit?

Yes, the fasteners in the kits are available loose as well, so once you know which size a job favors you can restock that size individually while keeping the kit for variety.

Is the finish uniform across the kit?

Yes, buying the assortment as a kit means the whole range shares the same black oxide finish, which is harder to guarantee when matching separate loose orders.