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Available in Grade G (CFLG Series) Material and Performance
Unit of Measure

Specifications

Post Plating Finish

N/A Yellow Chromate

Material

N/A 2 - Low Carbon Steel 4 - Grade B 5 - Grade C
Plating1 N/A 1 - Zinc 9 - Plain
Nominal Size or Basic Major Dia. of Thread2 N/A 5/16-18 0.3125 in

Max. Height - A

N/A .365 in

Max. Flange Dia. - B

N/A .680 in

Width Across Flats - Basic - F

N/A 1/2 in

Max. Width Across Flats - F

N/A .5020 in

Min. Width Across Flats - F

N/A .489 in

Max. Width Across Corners - G

N/A .577 in

Min. Width Across Corners - G

N/A .557 in

Min. Bearing Dia.

N/A .602 in

Min. Flange Thickness

N/A .05 in

Min. Corner Wrenching Length

N/A .17 in

Max. Counter Sink Dia.

N/A .357 in

Max. Angularity of BRG. Surf with THD P.D.

N/A .013 in

Max. Flange Top Radius

N/A .01 in
  • 1 9 - Plain cannot be used with a Post Plating Finish
  • 2 Fine Threads Available upon Request