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NSI Industries JSBW12 - Flat Washer, Silicon Bronze material, 1-1/16 in. outside diameter, 17/32 in. inside diameter, 1/2 in. fits bolt sizes, 100 per pack
NSI Industries

JSBW12

Alternate Item Number: 80519

UPC: 639720805192

Documents & Media
Specification Sheet

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Minimum Qty: 100

Multiplier: 100

*Contact for lower quantities*

Overview

The NSi Industries JSBW12 Silicon Bronze Flat Washer is a precision-engineered industrial fastener designed for marine, construction, and corrosive environments. Manufactured from silicon bronze (UNS C65500), this washer combines high tensile strength (90,000 PSI minimum) with exceptional resistance to saltwater, chlorine, and industrial chemicals—making it ideal for saltwater marine applications, chemical processing plants, and outdoor infrastructure projects. The washer features a 1-1/16" outside diameter (27mm) and 17/32" inside diameter (13.5mm), precisely matching 1/2" bolt sizes for secure load distribution. With a thickness of 1/8" (3.2mm), this washer provides stable clamping force while preventing surface damage to softer materials. Packaged in quantities of 100, the JSBW12 is optimized for bulk industrial use, ensuring consistent availability for maintenance, repair, and OEM applications. Its silicon bronze composition offers superior conductivity compared to stainless steel, making it suitable for electrical grounding applications in harsh environments. NSi Industries, a U.S.-based manufacturer, guarantees dimensional accuracy within ±0.005" to ensure reliable performance in critical assemblies. Typical applications include shipbuilding, water treatment facilities, and coastal construction where corrosion resistance is paramount.
  • Material: Silicon Bronze (UNS C65500) for superior corrosion resistance
  • Dimensions: 1-1/16" OD, 17/32" ID, 1/8" thick; fits 1/2" bolt sizes
  • Pack Quantity: 100 washers per package for bulk industrial use
  • Applications: Marine, chemical processing, coastal construction, and electrical grounding
  • Compliance: Manufactured in the USA with dimensional accuracy ±0.005"

Specifications

Application
Metal to Metal
Fits Bolt Sizes
1/2 IN
Inside Diameter
17/32 IN
Material
Silicon Bronze
Material Quality
Silicon Bronze
Outside Diameter
1.0625 in
Standard
SAE
Type
Flat Washer
Package Dimensions (L x W x H)
3 IN x 3 IN x 3.6 IN
Package Dimensions (L x W x H)
7.62 cm x 7.62 cm x 9.144 cm
Package Weight (Imperial)
2.400 L
Package Weight (Metric)
1.089 kg
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Frequently Asked Questions

Is the JSBW12 washer RoHS compliant?

Yes, the JSBW12 washer is compliant with current RoHS European Union Directive.

What materials are used in the JSBW12 washers?

The JSBW12 washers are made of brass and silicon bronze, compliant with RoHS requirements.

What is the minimum copper content in the brass washers?

The minimum copper content in the brass washers is 57%.

What is the maximum alloying elements in the brass washers?

The maximum alloying elements in the brass washers is 5%.

What are the dimensions of the JSBW12 washer?

The dimensions of the JSBW12 washer can be found in the specification table provided.

What silicon bronze alloys are used in the JSBW12?

The silicon bronze used includes AISI 651, 656, 655, 661 or UNS C65100, C56500, C65500, C66100.

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