Metric Thru Hardened Flat Washers

Metric Thru Hardened 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 Metric Thru Hardened Flat Washers in stock and ready to ship, with fast 3-5 day shipping. Popular options include zinc plated metric thru hardened flat washers, M5 metric thru hardened flat washers, and M6 metric thru hardened flat washers.

Product Name	Bolt or Screw Size	Inside Diameter	Outside Diameter	Thickness	Material	Finish
45.41600	M5 (5.7 MM x 11 MM x 1.2 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371040	M5	5.7 MM	11 MM	1.2 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details
29.73000	M6 (6.7 MM x 13 MM x 1.5 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371060	M6	6.7 MM	13 MM	1.5 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details
25.35400	M8 (9 MM x 18.8 MM x 2 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371080	M8	9 MM	18.8 MM	2 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details
12.80000	M10 (11 MM x 20 MM x 2 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371100	M10	11 MM	20 MM	2 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details
24.92300	M12 (13.5 MM x 25.4 MM x 2.5 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371120	M12	13.5 MM	25.4 MM	2.5 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details
40.06200	M14 (15.5 MM x 28 MM x 2.5 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371140	M14	15.5 MM	28 MM	2.5 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details
30.16150	M16 (17.5 MM x 32 MM x 3 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371160	M16	17.5 MM	32 MM	3 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details
44.48450	M18 (19 MM x 34 MM x 3 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371180	M18	19 MM	34 MM	3 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details
46.63100	M20 (22 MM x 39 MM x 3.5 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371200	M20	22 MM	39 MM	3.5 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details
39.87300	M24 (26 MM x 44 MM x 4 MM) Metric Flat Washers (Narrow), ASME B18.22M, Through Hardened Steel, Blue Zinc Cr+3, USA	371240	M24	26 MM	44 MM	4 MM	Through Hardened Steel	Blue Zinc Cr+3	View Details

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Materials and Finishes

Metric Thru Hardened 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 metric flat washers, Bolts, 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.

Metric Thru Hardened Flat Washers Industry Applications

Metric Thru Hardened Flat Washers show up across a wide range of industries and applications. Manufacturing and automotive spread clamping load and protect surfaces with them, while HVAC add tension to keep joints tight with them. Plain, zinc, and stainless, in SAE, USS, and structural sizes matched to the bolt diameter. Stocked in metric DIN and ISO sizes.

Frequently Asked Questions

What materials and finishes are metric thru hardened flat washers available in?

Metric Thru Hardened 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. Common options include flat washers and nylon flat washers.

What are metric thru hardened flat washers used for?

Metric Thru Hardened Flat Washers are relied on across manufacturing, automotive, and HVAC, from structural framing and heavy equipment to machinery and general repair.

How do I choose the right metric thru hardened 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. We also stock fasteners.