US / Inch - USS Flat Washers in Zinc Plated Steel (Cr+3 fully RoHS compliant). Washers are made from low carbon steel.

USS - United States Standard washer.

Available in the following sizes : #10 (3/16"), 1/4", 5/16" & 3/8"

5 lb. weight package quantity reference

#10 5 lbs is about 1330 pcs.

1/4" 5 lbs is about 770 pcs.

5/16" 5 lbs is about 415 pcs.

3/8" 5 lbs is about 322 pcs.