Serrated Flange Screws

Serrated Flange Screws, Serrated Flange Bolts and commonly known by their trade name as Whiz-Lock Bolts, are unslotted hex head flange screws that have serrations under the flange, or on the bearing surface. The flange provides more strength than a regular hex screw, and in some applications, the serrations eliminate the need for lock washers or lock nuts.

Serrated Flange Screws are a form of hex head bolt with a wider serrated flange under the head. The circular serrated flange under the head serves as a washer and a locking device, spreading the load and providing nearly four times the bearing area of a regular hex screw. Flange bolts are commonly used in the frames of vehicles, especially trucks. Non-serrated flange bolts are most commonly used.
Common applications of Serrated Flange Screws are:

  • • Automotive
  • • Plumbing
  • • Electronics
Serrated Flange Screws Diameters

Serrated Flange Screws are available on the FCH Network with Imperial/US diameters that range from #0 to 5 1/2 and with Metric diameters that range from M3 to M20. The length of Serrated Flange Screws is usually measured from the point to the underside of the head.

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Serrated Flange Screws Lengths

Serrated Flange Screws are available on the FCH Network with lengths that range from 1/4 to 18.

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Serrated Flange Screws Finishes

Serrated Flange Screws are available on the FCH Network in finishes or coatings that range from Plain to Phosphate

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