M8 Flat Washers: Comparing 16 Mm and 24 Mm Footprints
My Small Parts washer purchase combines an M8 size grouping with a 16-millimeter outside diameter. The alternatives have wider 24-millimeter disks, so the M8 label alone does not describe their footprint.
The roof-frame assembly made the space around each fastening point tangible: profiles, connectors and small nuts all had to fit together. I recorded separate hardware groups for the rack and the added 2020 extrusion.
This M8 washer pack belongs to my broader fastener purchases. Its outside diameter describes the disk around the hole, so it gives a useful comparison with the wider black and stainless alternatives shown below.
The drilled connectors and fasteners joining my added extrusion to the roof rack.
Comparing Sixteen- and Twenty-Four-Millimeter M8 Disks
I used distinct hardware groups when connecting the roof rack and smaller extrusion.
My broader washer purchases added M8 hardware to that kit.
This Small Parts pack supplies zinc-plated steel disks with a sixteen-millimeter outside diameter.
The profiles and joint hardware during my roof-mount assembly.
My Takeaway for Choosing the Kit
I would compare the outside diameter and material alongside the hole-size grouping. The purchased Small Parts disks are 16 mm across; both alternatives are 24 mm. The black finish and stainless material add another distinction. My choice would depend on the space around that particular fastening point as well as the disk material.
Product Details And Van-Build Uses
Specification
Product Detail
Thread Group
M8
Outside Diameter
16 mm
Inside Diameter
8.4 mm
Thickness
1.6 mm
The Small Parts M8 washer shown here has a sixteen-millimeter outside diameter, so it occupies less space than the twenty-four-millimeter alternative compared below. That difference matters beside an extrusion edge, a tight bracket or another fastener. The center opening determines bolt clearance; the outside diameter determines the contact footprint. For a van mounting layout, compare both dimensions rather than ordering by M8 alone. Include washer thickness when working out how much bolt thread remains beyond the assembled parts.
Both can surround an M8 bolt while covering different areas. The larger footprint needs more clearance, while the smaller washer can fit a tighter mounting location.
Alternative products
Two Alternatives to Compare
The black M8 and stainless alternatives both use wider disks. Finish and outside diameter are separate choices from the M8 hole-size grouping.
Product
Why compare this option
Purchase link
Small Parts M8 Zinc-Plated Flat Washers
Purchased M8 zinc-plated steel disks; 16 mm outside diameter.
These black M8 flat washers have a broad twenty-four-millimeter outside diameter. Their disk shape provides a larger contact footprint than a narrower washer.
These M8 stainless washers have a twenty-four-millimeter outside diameter. Their broad disks provide a larger contact footprint than narrower flat washers.
