Galvanized USS Flat Washers

Galvanized USS flat washers are wide-pattern flat washers with a hot dip galvanized finish. The larger outside diameter spreads the load on wood and soft materials, and the galvanized coating holds up outdoors and in treated lumber. We stock sizes 1/4" through 1-1/2". Dimensions are in the table below.

Specifications

Pattern: USS (wide)
Finish: hot dip galvanized
Sizes: 1/4", 5/16", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-1/2"

Dimensions

Size	O.D.	I.D.	Thickness	# per Lb. (approx.)
3/16	9/16	1/4	3/64	361
1/4	3/4	5/16	1/16	149
5/16	7/8	3/8	5/64	87
3/8	1"	7/16	5/64	67
7/16	1-1/4	1/2	5/64	41
1/2	1-3/8	9/16	7/64	26
9/16	1-1/2	5/8	7/64	22
5/8	1-3/4	11/16	9/64	13
3/4	2"	13/16	5/32	9.1
7/8	2-1/4	15/16	11/64	6.5
1"	2-1/2	1-1/16	11/64	5.3
1-1/8	2-3/4	1-1/4	11/64	4.5
1-1/4	3"	1-3/8	11/64	3.8
1-3/8	3-1/4	1-1/2	3/16	3
1-1/2	3-1/2	1-5/8	3/16	2.6
1-5/8	3-3/4	1-3/4	3/16	2.3
1-3/4	4"	1-7/8	3/16	2
1-7/8	4-1/4	2"	3/16	1.8
2"	4-1/2	2-1/8	3/16	1.6
2-1/4	4-3/4	2-3/8	7/32	1.2
2-1/2	5"	2-5/8	15/64	1.0
2-3/4	5-1/4	2-7/8	1/4	0.9
3"	5-1/2	3-1/8	5/32	0.9

Common Uses

Galvanized bolts and lag screws in wood
Decks, docks and fences
L anchors and threaded rod

FAQ

What size washer goes with a 1/2" galvanized bolt?
A 1/2" galvanized USS flat washer. It has a 9/16" hole and a 1-3/8" outside diameter.

USS or SAE galvanized washer?
USS has a bigger outside diameter, which is better on wood. SAE fits closer and is smaller, which suits steel and tight spaces.

Free shipping on orders over $100, and orders placed before noon EST ship the same day. Purchase orders are accepted from government agencies, schools, hospitals, municipalities and companies with established credit with The Nutty Company, Inc.