NSI Industries JSSW121 - Flat Washer, Stainless Steel material, 5/8 in. outside diameter, 9/32 in. inside diameter, 1/4 in. fits bolt sizes, 100 per pack, 316 grade
NSI Industries

JSSW121

Alternate Item Number: 89521

UPC: 639720895216


Documents & Media
Specification Sheet

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Minimum Qty: 100

Multiplier: 100

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Overview

The NSi Industries JSSW121 is a precision-engineered 316-grade stainless steel flat washer designed for heavy-duty fastening applications requiring superior corrosion resistance. Manufactured in the USA, this washer features a 5/8-inch outside diameter, a 9/32-inch inside diameter, and is compatible with 1/4-inch bolts. The 316-grade stainless steel composition provides exceptional resistance to chlorides, acids, and high-temperature environments, making it ideal for marine, chemical processing, food processing, pharmaceutical, and outdoor industrial applications where rust and corrosion are critical concerns. Each washer is produced to tight tolerances, ensuring consistent fit and load distribution across fasteners. The flat design distributes clamping force evenly, reducing the risk of surface damage and improving joint integrity in high-stress assemblies. The 100-piece bulk packaging is optimized for high-volume use in workshops, fabrication shops, and maintenance operations, reducing downtime associated with fastener replenishment. NSi Industries, a trusted name in industrial fasteners, guarantees dimensional accuracy and material consistency in every JSSW121 washer. The 316-grade stainless steel offers a tensile strength of approximately 75,000 psi and a yield strength of 30,000 psi, providing reliable performance in both static and dynamic loading conditions. This washer meets or exceeds ASTM F593 and AISI 316 standards for stainless steel fasteners, ensuring compatibility with ANSI, ASME, and ISO bolt specifications. Use the JSSW121 in corrosive environments such as coastal structures, chemical storage tanks, water treatment facilities, and food-grade equipment where traditional carbon steel washers would fail prematurely. The non-magnetic properties of 316 stainless steel also make it suitable for applications requiring electromagnetic interference (EMI) shielding or non-sparking environments.
  • 316-grade stainless steel for superior corrosion resistance in harsh environments
  • 5/8" outside diameter, 9/32" inside diameter, fits 1/4" bolts
  • Non-magnetic and non-sparking for safety in sensitive applications
  • Produced in the USA to ASTM F593 and AISI 316 standards
  • 100-piece bulk packaging for high-volume industrial use

Specifications

Application
Metal to Metal
Fits Bolt Sizes
1/4 IN
Inside Diameter
9/32 IN
Material
Stainless Steel
Outside Diameter
0.625 in
Type
Flat Washer
Package Dimensions (L x W x H)
3 IN x 3 IN x 2.15 IN
Package Dimensions (L x W x H)
7.62 cm x 7.62 cm x 5.461 cm
Package Weight (Imperial)
0.390 L
Package Weight (Metric)
0.177 kg
Flat Washer, Stainless Steel material, 5/8 in. outside diameter, 9/32 in. inside diameter, 1/4 in. fits bolt sizes, 100 per pack, 18-8 grade

JSSW12

Flat Washer, Stainless Steel material, 5/8 in. outside diameter, 9/32 in. inside diameter, 1/4 in. fits bolt sizes, 100 per pack, 18-8 grade
Washer, Flat, Size 3/8 Inch, Stainless Steel

E147 3/8SS

Washer, Flat, Size 3/8 Inch, Stainless Steel

Frequently Asked Questions

What products does this specification sheet cover?

This specification sheet applies to all Flat (SAE) Washers in the JSW series.

What materials are available for JSW series flat washers?

JSW series flat washers are available in Domestic, Steel Zinc, 18-8 Stainless Steel, and 316 Stainless Steel.

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