Universal M10-1.25 Hex Flange Nut 19mm OD | Zinc & Yellow Chromate | 18253
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Zinc and yellow chromate hex flange nut for M10-1.25 thread applications. The integrated flanged washer bearing surface eliminates the need for a separate flat washer, distributing clamping load over a 19mm diameter — larger than a standard nut alone. The serrated or smooth flange face resists loosening under vibration, making this nut well suited for suspension components, exhaust fastening, and underbody hardware where vibration is a concern.
Specifications
- Type: Hex Flange Nut
- Thread Size: M10-1.25
- Across Flats: 14mm
- Flange Diameter: 19mm
- Overall Height: 9mm
- Material: Steel
- Finish: Zinc & Yellow Chromate
Vehicle Fitment
- Universal — M10-1.25 thread applications across domestic and import vehicles
Cross-Reference Numbers
- Thread Size: M10-1.25
- SMS Part#: 18253
What is the advantage of a hex flange nut over a standard hex nut?
A hex flange nut has an integrated washer-like flange that serves two purposes: it provides a wider bearing surface (19mm vs. the 14mm hex face) to distribute clamping load, and the flange face — often serrated — resists loosening under vibration. This eliminates the need for a separate flat washer and provides better anti-vibration performance than a plain hex nut.
Is M10-1.25 a fine or coarse thread?
M10-1.25 is a fine thread pitch for M10 fasteners — 1.25mm between thread peaks. The standard (coarse) M10 pitch is M10-1.5. Fine thread nuts provide more clamping force per unit of torque and are common on suspension and steering components where precise torque control is important. Verify your bolt's thread pitch before ordering.
What does zinc and yellow chromate finish mean?
This nut has a dual-layer corrosion protection system: an electrogalvanized zinc base coat for corrosion resistance, topped with a yellow chromate conversion coating that further improves corrosion resistance and provides the characteristic gold/yellow color. This finish is commonly used on automotive suspension and exhaust hardware where moderate corrosion resistance is required.
What wrench size does this nut require?
This hex flange nut has a 14mm across-flats dimension, requiring a 14mm wrench or socket for installation and removal. Note that M10-1.25 flange nuts commonly use 14mm AF rather than the 17mm AF used on standard DIN 934 M10-1.5 nuts — verify your wrench size if switching between nut types.
What pack sizes are available?
Available in packs of 10, 20, 40, and 60 to suit individual repairs or shop stock needs.