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Stainless Steel 304L Washers

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Manufacturer, Exporter & Supplier of Stainless Steel 304L Washers

Stainless Steel 304L Washers for Industrial Applications & Precision Assembly

Stainless Steel 304L Washers are precision-engineered fastening components designed to distribute load, reduce surface wear, and maintain joint stability in bolted assemblies exposed to corrosive or high-moisture environments. Manufactured from low-carbon austenitic stainless steel (304L grade), these washers comply with widely recognized standards such as DIN 125, ISO 7089, and ASTM A240, ensuring dimensional accuracy and reliable mechanical performance across critical applications.

Stainless Steel 304L Washers Manufacturer

These washers are extensively used in chemical processing plants, marine equipment, construction frameworks, and heavy machinery assemblies where corrosion resistance and long-term structural integrity are essential. The low carbon content in 304L enhances weldability and reduces carbide precipitation, making it suitable for welded structures and continuous load environments.

KK Fasteners supplies Stainless Steel 304L Washers to global OEMs and industrial distributors, ensuring material traceability and strict dimensional control for every production batch. For engineers and procurement teams, these washers deliver a dependable balance of corrosion resistance, mechanical stability, and international standard compliance—making them a preferred choice in demanding industrial environments.

Technical Specifications Of Stainless Steel 304L Washers

Parameter Specification
MaterialStainless Steel 304L (Austenitic, Low Carbon)
Equivalent GradesAISI 304L, UNS S30403, EN 1.4307
Size RangeM3 to M64 (Metric), 1/8" to 2.5" (Imperial)
Thread Type CompatibilityMetric (Coarse/Fine), UNC, UNF
StandardsDIN 125, DIN 9021, ISO 7089, ASTM A240, BS 4320
Surface FinishPlain, Passivated, Polished, Anti-corrosion Coated
Type VariantsFlat Washers, Spring Washers (supporting variants), Fender Washers
Hardness≤ 95 HRB (Typical)
Tensile Strength485 MPa (Minimum)

Chemical Composition Of Stainless Steel 304L Washers

Grade C Mn Si P S Cr Mo Ni N
304L min. – – – – – 18.0 – 8.0 –
max. 0.08 2.0 0.75 0.045 0.030 20.0 10.5 0.10

Mechanical Properties Of Stainless Steel 304L Washers

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
304L 515 205 40 92 201

Equivalent Grades of Stainless Steel 304 Washers

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
304L S30400 304S31 58E 1.4301 X5CrNi18-10 2332 SUS 304L

Stainless Steel 304L Flat Washers Dimensions

Flat Washers Dimensions
Bolt Size
USS
SAE
OD (in.)
ID (in.)
Thickness
OD (in.)
ID (in.)
Thickness
1/8 (#6)
-
-
-
0.375
0.156
.036/.065
5/32 (#8)
-
-
-
0.438
0.188
.036/.065
3/16 (#10)
0.560
0.250
.036/.065
0.500
0.220
.036/.065
7/32 (#12)
-
-
-
0.562
0.250
.051/.080
1/4 (#14)
0.734
0.312
.051/.080
0.625
0.281
.051/.080
5/16
0.875
0.375
.064/.104
0.688
0.344
.051/.080
3/8
1.000
0.438
.064/.104
0.812
0.406
.051/.080
7/16
1.250
0.500
.064/.104
0.922
0.469
.051/.080
1/2
1.375
0.562
.086/.132
1.062
0.531
.074/.121
9/16
1.469
0.625
.086/.132
1.156
0.594
.074/.121
5/8
1.750
0.688
.108/.160
1.312
0.656
.074/.121
3/4
2.000
0.812
.122/.177
1.469
0.812
.108/.160
7/8
2.250
0.938
.136/.192
1.750
0.938
.108/.160
1
2.500
1.062
.136/.192
2.000
1.062
.108/.160
1 1/8
2.750
1.250
.136/.192
2.250
1.250
.108/.160
1 1/4
3.000
1.375
.136/.192
2.500
1.375
.136/.192
1 3/8
3.250
1.500
.153/.213
2.750
1.500
.136/.213
1 1/2
3.500
1.625
.153/.213
3.000
1.625
.153/.213
1 5/8
3.750
1.750
.153/.213
-
-
-
1 3/4
4.000
1.875
.153/.213
-
-
-
1 7/8
4.250
2.000
.153/.213
-
-
-
2
4.500
2.125
.153/.213
-
-
-
2 1/4
4.750
2.375
.320/.248
-
-
-
2 1/2
5.000
2.625
.210/.280
-
-
-
2 3/4
5.250
2.875
.228/.410S
-
-
-
3
5.500
3.125
.249/.327
-
-
-

Stainless Steel 304L Washers Size Chart

Size
USS
SAE
Inside Diameter
(A)
Outside Diameter
(B)
Thickness
(C)
Inside Diameter
(A)
Outside Diameter
(B)
Thickness
(C)
#2
-
-
-
3/32"
1/4"
0.020"
#4
-
-
-
1/8"
5/16"
0.032"
#6
-
-
-
5/32"
3/8"
0.049"
#8
-
-
-
3/16"
7/16"
0.049"
#10
-
-
-
7/32"
1/2"
0.049"
#12
-
-
-
1/4"
9/16"
0.065"
1/4"
5/16"
0.734"
0.065"
9/32"
5/8"
0.065"
5/16"
3/8"
7/8"
0.083"
11/32"
11/16"
0.065"
3/8"
7/16"
1"
0.083"
13/32"
13/16"
0.065"
7/16"
1/2"
1-1/4"
0.083"
15/32"
15/16"
0.065"
1/2"
9/16"
1-3/8"
0.109"
17/32"
1-1/16"
0.095"
9/16"
5/8"
1-15/32"
0.109"
19/32"
1-5/32"
0.095"
5/8"
11/16"
1-3/4"
0.134"
21/32"
1-5/16"
0.095"
3/4"
13/16"
2"
0.148"
13/16"
1-15/32"
0.134"
7/8"
15/16"
2-1/4"
0.165"
15/16"
1-3/4"
0.134"
1"
1-1/16"
2-1/2"
0.165"
1-1/16"
2"
0.134"
1-1/8"
1-1/4"
2-3/4"
0.165"
-
-
-
1-1/4"
1-3/8"
3"
0.165"
-
-
-
1-3/8"
1-1/2"
3-1/4"
0.180"
-
-
-
1-1/2"
1-5/8"
3-1/2"
0.180"
-
-
-
1-5/8"
1-3/4"
3-3/4"
0.180"
-
-
-
1-3/4"
1-7/8"
4"
0.180"
-
-
-
2"
2-1/8"
4-1/2"
0.213"
-
-
-

Range of Stainless Steel 304L Washers

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Spring Lock Washers

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Plain Flat Washers

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Square Washers

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Square Bevel Washers

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Tab Washers

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External Tooth Lock Washers

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Internal Tab Washers

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Hex Washers

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Bonded Sealing Washers

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Conical Spring Washers

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Countersunk Washers

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Dock Washers

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Fender Washers

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Finishing Washers

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Ogee Washers

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Internal Tooth Lock Washers

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Self Locking Washers

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Wave Washers

Different Types of Stainless Steel 304L Washers

  • Stainless Steel 304L Spring Washers
  • Stainless Steel 304L Machined Washers
  • Stainless Steel 304L Square Washers
  • Stainless Steel 304L Plain Flat Washers
  • Stainless Steel 304L Spring Lock Washers
  • Stainless Steel 304L Tab Washers
  • Stainless Steel 304L Internal Tab Washers
  • Stainless Steel 304L Square Beveled Washers
  • Stainless Steel 304L Hex Washers
  • Stainless Steel 304L External Tooth Lock Washers
  • Stainless Steel 304L Internal Tooth Lock Washers
  • Stainless Steel 304L Curved Wave Washers
  • Stainless Steel 304L Conical Spring Washers
  • Stainless Steel 304L Self Locking Washers
  • Stainless Steel 304L Dock Washers
  • Stainless Steel 304L Fender Washers
  • Stainless Steel 304L Ogee Washers
  • Stainless Steel 304L Sealing Washers
  • Stainless Steel 304L Countersunk Washers
  • Stainless Steel 304L Finishing Washers

Key Technical Features

  • Uniform Load Distribution: Designed to evenly distribute bolt preload across the joint surface, reducing localized stress concentration and preventing material deformation in structural assemblies.
  • Corrosion Resistance in Aggressive Environments: 304L stainless steel provides enhanced resistance to chlorides and moisture-induced corrosion, making it suitable for marine and chemical processing applications.
  • Low Carbon Stability: Reduced carbon content minimizes carbide precipitation during welding, ensuring long-term structural integrity in welded assemblies.
  • High Dimensional Accuracy: Manufactured with tight tolerances as per DIN/ISO standards, ensuring perfect fitment in automated assembly lines and precision machinery.
  • Load Bearing Efficiency: Capable of maintaining structural integrity under dynamic vibration loads in heavy-duty mechanical systems.
  • Surface Finish Integrity: Passivated surface enhances chromium oxide layer formation, improving resistance against oxidation and surface pitting.
  • Compatibility Across Fastener Systems: Engineered for use with metric and imperial fastening systems, supporting global OEM requirements.
  • Consistent Batch Traceability: Each production lot is traceable, ensuring compliance with industrial QA systems and procurement documentation standards.

Industry Applications

Stainless Steel 304L Washers are used wherever controlled load distribution, vibration resistance, and corrosion protection are required in bolted assemblies across industrial systems.

  • Chemical Processing Equipment: Used in flange connections and reactor assemblies to prevent leakage and surface wear under corrosive exposure.
  • Marine & Offshore Structures: Installed in shipbuilding and offshore platforms to resist saltwater corrosion and maintain joint integrity.
  • Construction Engineering: Applied in steel structures and façade systems to stabilize bolted joints under wind and load stress.
  • Automotive Manufacturing: Used in chassis assemblies and engine mounts to reduce vibration-induced loosening.
  • Power Generation Plants: Installed in turbines and auxiliary equipment where thermal cycling and moisture resistance are critical.
  • Oil & Gas Infrastructure: Used in pipeline supports and valve assemblies exposed to harsh environmental conditions.
  • Industrial Machinery: Provides load distribution in high-speed rotating equipment and heavy-duty fabrication systems.
  • Food & Pharmaceutical Equipment: Ensures hygienic fastening in stainless steel processing equipment with corrosion-free performance.

Manufacturing & Quality Assurance

Stainless Steel 304L Washers are manufactured using precision stamping and cold forging techniques to ensure consistent geometry and surface quality. The production process begins with stainless steel coil selection, followed by blanking, forming, and edge finishing under controlled conditions. Each batch undergoes dimensional calibration to meet DIN and ISO tolerance requirements.

Quality control includes hardness testing, tensile verification, and surface inspection to ensure defect-free output. Passivation treatment is applied to enhance corrosion resistance by strengthening the chromium oxide layer. KK Fasteners maintains strict lot traceability and inspection records for every shipment, ensuring compliance with ISO 9001:2015 quality systems along with RoHS and REACH requirements for global markets.

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Personalized assistance, prompt responses, and a commitment to meeting your needs, making your purchase process seamless.

Send us your Requirement for Stainless Steel 304L Washers

We can assure you one of best prices in the Industry. We respond to all enquiries with in 4-8 hours on all business days. Send us your requirement on inquiry@kkfasteners.com
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Stainless Steel 304L Washers - FAQs

Stainless Steel 304L Washers are flat circular components used in bolted assemblies to distribute load, reduce surface damage, and improve joint stability. Made from low-carbon austenitic stainless steel, they offer strong corrosion resistance and are widely used in chemical, marine, and construction industries where durability and long service life are required.

The key difference is carbon content. 304L has lower carbon than 304, which reduces carbide precipitation during welding and improves corrosion resistance in welded structures. This makes 304L more suitable for applications exposed to moisture, chemicals, and continuous stress conditions.

These washers are commonly manufactured according to DIN 125, DIN 9021, ISO 7089, ASTM A240, and BS 4320 standards. These ensure proper dimensional accuracy, mechanical strength, and global compatibility in industrial fastening systems.

Selection depends on environmental conditions, load type, and material compatibility. 304L is ideal for general corrosion resistance and welded assemblies, while 316 is better for high chloride or marine exposure. Engineers should also consider bolt grade and compliance with international standards.

Choose a supplier with ISO certification, material traceability, and proven export experience. Reliable manufacturers provide test certificates, consistent quality control, and compliance with DIN/ISO standards. KK Fasteners supplies globally with documented inspection and traceability for industrial buyers.

Stainless Steel 304L Washers - Export Destination

Stainless Steel 304L Washers Supplier in North America
Antigua and Barbuda, Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, United States.
Stainless Steel 304L Washers Supplier in South America
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.
Stainless Steel 304L Washers Supplier in Europe
Albania, Andorra, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic (Czechia), Denmark, Estonia, Finland, France, Germany, Greece, Holy See, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Russia, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom.
Stainless Steel 304L Washers Supplier in Asia
Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, Brunei, Cambodia, Cyprus, Georgia, India, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Laos, Lebanon, Malaysia, Maldives, Mongolia, Myanmar, Nepal, Oman, Pakistan, Palestine, Philippines, Qatar, Saudi Arabia, Singapore, South Korea, Sri Lanka, State of Palestine, Syria, Taiwan, Tajikistan, Thailand, Timor-Leste, Turkey, Turkmenistan, United Arab Emirates, Uzbekistan, Vietnam, Yemen.
Stainless Steel 304L Washers Supplier in Australia
Australia, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Zealand, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu.

Stainless Steel 304L Washers deliver dependable performance in corrosion-prone and high-load industrial environments where precision and compliance matter. With controlled manufacturing and global export capability, KK Fasteners ensures consistent quality backed by traceable production standards. For technical specifications, bulk pricing, or custom dimensions, connect with the engineering team at KK Fasteners to request a detailed quotation or project-specific support.

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