Diameter Thread Threads Length Grade Finish Weight
0.3750 (3/8) N/A 16 GR G Zinc Yellow & Wax 0.0255
Diameter 0.3750 (3/8)
Thread 16
Grade GR G
Finish Zinc Yellow & Wax
Weight 0.0255

  • GR G
  • Alloy Steel

The Hex Flange Lock Nuts, or Stover Flange Nuts, are crimped like Hex Top Lock Nuts and designed with a built-in washer. The crimped tops provide metal-to-metal gripping strength with male threads to prevent loosening. The washers give the nuts a wider clamping force protecting the material being fastened. This nuts excel in the vibrating world of truck frames. Earnest offers Hex Flange Lock Nuts in a Grade G strength equaling the strength level of Grade 8 nuts.

Hex Flange Lock Nut – Grade G

  • Top crimp with a built-in washer provides wider clamping area
  • Nut must be wrenched into place
  • Used in high-vibration applications (truck frames)
  • Proof load strength of 150,000 psi min
  • Rockwell Hardness:
  • 1/4” to 5/8”: Rc 24/32
  • 3/4” and larger: Rc 26/34
  • Sizes range from 1/4 to 1”
  • Meets ASME B18.16.6 (IFI 100/107) standards

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