SAE Flat Washers

SAE Flat Washers sit under a bolt head or nut to spread the clamp load and protect the work surface. The right washer protects the joint, spreads the load, and keeps the fastener from working loose over time. South Coast Fasteners keeps SAE Flat Washers in stock and ready to ship, with fast 3-5 day shipping.

Bolt or Screw Size	Material	Inside Diameter	Outside Diameter	Finish	Thickness
1/4" Flat Washers (SAE), Steel, Yellow Zinc Cr+6 (Dims: 9/32" I.D I.D. x 5/8" O.D.) (Bulk Qty is per 50 lb Box, 10,890 Pieces)	256051	1/4"	Steel			Yellow Zinc Cr+6	View Details
5/16" Flat Washers (SAE), Steel, Yellow Zinc Cr+6 (Dims: 11/32" I.D I.D. x 11/16" O.D.) (Bulk Qty is per 50 lb Box, 9,620 Pieces)	256056	5/16"	Steel			Yellow Zinc Cr+6	View Details
3/8" Flat Washers (SAE), Steel, Yellow Zinc Cr+6 (Dims: 13/32" I.D I.D. x 13/16" O.D.) (Bulk Qty is per 50 lb Box, 6,920 Pieces)	256061	3/8"	Steel			Yellow Zinc Cr+6	View Details
1/2" Flat Washers (SAE), Steel, Yellow Zinc Cr+6 (Dims: 17/32" I.D I.D. x 1 1/16" O.D.) (Bulk Qty is per 50 lb Box, 2,670 Pieces)	256071	1/2"	Steel			Yellow Zinc Cr+6	View Details
5/8" Flat Washers (SAE), Steel, Yellow Zinc Cr+6 (Dims: 21/32" I.D I.D. x 1 5/16" O.D.) (Bulk Qty is per 50 lb Box, 1,760 Pieces)	256081	5/8"	Steel			Yellow Zinc Cr+6	View Details
3/4" Flat Washers (SAE), Steel, Yellow Zinc Cr+6 (Dims: 13/16" I.D I.D. x 1 1/2" O.D.) (Bulk Qty is per 50 lb Box, 1,110 Pieces)	256086	3/4"	Steel			Yellow Zinc Cr+6	View Details
7/8" Flat Washers (SAE), Steel, Yellow Zinc Cr+6 (Dims: 15/16" I.D I.D. x 1 3/4" O.D.)(Bulk Qty is per 50 lb Box, 760 Pieces)	256091	7/8"	Steel			Yellow Zinc Cr+6	View Details
1" Flat Washers (SAE), Steel, Yellow Zinc Cr+6 (Dims: 1 1/16" I.D I.D. x 2" O.D.) (Bulk Qty is per 50 lb Box, 580 Pieces)	256096	1"	Steel			Yellow Zinc Cr+6	View Details
#6 Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 5/32" I.D. x 3/8" O.D.) (Bulk Qty is per 50 lb Box, 37,040 Pieces)	346001	#6	Low Carbon Steel	5/32 "	3/8"	Plain	View Details
#8 Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 3/16" I.D. x 7/16" O.D.) (Bulk Qty is per 50 lb Box, 27,620 Pieces)	346002	#8	Low Carbon Steel	3/16 "	7 /16"	Plain	View Details
#10 Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 7/32" I.D. x 1/2" O.D.) (Bulk Qty is per 50 lb Box, 21,460 Pieces)	346003	#10	Low Carbon Steel	7/32 "	1/2"	Plain	View Details
1/4" Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 9/32" I.D. x 5/8" O.D.) (Bulk Qty is per 50 lb Box, 10,850 Pieces)	346004	1/4"	Low Carbon Steel	9/32"	5/8"	Plain	View Details
5/16" Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 11/32" I.D. x 11/16" O.D.) (Bulk Qty is per 50 lb Box, 9,600 Pieces)	346005	5/16"	Low Carbon Steel	11/32"	11/16"	Plain	View Details
3/8" Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 13/32" I.D. x 13/16" O.D.) (Bulk Qty is per 50 lb Box, 6,900 Pieces)	346006	3/8"	Low Carbon Steel	13/32"	13/16"	Plain	View Details
7/16" Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 15/32" I.D. x 59/64" O.D.) (Bulk Qty is per 50 lb Box, 5,400 Pieces)	346007	7/16"	Low Carbon Steel	15/32"	59/64"	Plain	View Details
1/2" Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 17/32" I.D. x 1 1/16" O.D.) (Bulk Qty is per 50 lb Box, 2,650 Pieces)	346008	1/2"	Low Carbon Steel	17/32"	1 1/16"	Plain	View Details
9/16" Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 19/32" I.D. x 1 3/16" O.D.) (Bulk Qty is per 50 lb Box, 2,290 Pieces)	346009	9/16"	Low Carbon Steel	19/32"	1 3/16"	Plain	View Details
5/8" Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 21/32" I.D. x 1 5/16" O.D.) (Bulk Qty is per 50 lb Box, 1,750 Pieces)	346010	5/8"	Low Carbon Steel	21/32"	1 5/16"	Plain	View Details
3/4" Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 13/16" I.D. x 1 1/2" O.D.) (Bulk Qty is per 50 lb Box, 1,100 Pieces)	346011	3/4"	Low Carbon Steel	13/16"	1 1/2"	Plain	View Details
7/8" Flat Washers (SAE), Low Carbon Steel, Plain (Dims: 15/16" I.D. x 1 3/4" O.D.) (Bulk Qty is per 50 lb Box, 760 Pieces)	346012	7/8"	Low Carbon Steel	15/16"	1 3/4"	Plain	View Details

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Materials and Finishes

SAE Flat Washers come in grades matched to the load, from carbon steel through high-strength alloy and corrosion-resistant stainless, with finishes from plain and zinc through hot-dip galvanized for outdoor and washdown service. Pair them with bolts, fasteners, and Finished Hex Nuts to round out the assembly.

How to Choose

Match the grade to the working load and the finish to the environment after locking in diameter, thread pitch, and length. Harsh or corrosive settings call for alloy or stainless.

SAE Flat Washers Industry Applications

SAE Flat Washers are relied on wherever the work demands dependable, professional-grade results. Fabrication and welding add tension to keep joints tight with them, while automotive and HVAC back oversized and soft-material holes with them. Flat, fender, and split or tooth lock styles, including F436 hardened structural washers.

Frequently Asked Questions

What materials and finishes are sae flat washers available in?

What are sae flat washers used for?

SAE Flat Washers see daily use across fabrication, welding, automotive, and HVAC, from structural framing and heavy equipment to machinery and general repair.

How do I choose the right sae flat washers?

Match the grade to the working load and the finish to the environment after locking in diameter, thread pitch, and length. Harsh or corrosive settings call for alloy or stainless.

Can I order in bulk or request a quote?

Yes. Stock covers small orders and full production runs. Reach out for a quote or product help.

Why Choose South Coast Fasteners?

We are a single source for fasteners, PPE, hand tools, cutting tools, abrasives, and industrial supplies, priced to compete and shipped fast by a crew that uses this gear every day.