Authorized Minerallac Company Distributor
Minerallac Company 42525 - A coiled, hardened, split circular lock washer with a slightly trapezoidal wire section. It is made of silicon bronze and has a bronze color. The washer measures 0.062 in thick, 0.487 in outside diameter, and 0.260 in inside diameter.
Minerallac Company

42525

Alternate Item Number: 12114043

UPC: 085937425256

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Minimum Qty: 100

Multiplier: 100

*Contact for lower quantities*

Overview

The Minerallac 42525 1/4" Silicon Bronze Split Lock Washer is a precision-engineered fastener component designed to maintain bolt tension in high-vibration and corrosive environments. Constructed from Silicon Bronze (Alloy 651), this split lock washer delivers superior resistance to dezincification, stress corrosion cracking, and saltwater exposure, making it ideal for marine, coastal, and industrial applications where moisture and chlorides are prevalent. The washer features a hardened bearing surface with a Rockwell Hardness of C38-43, ensuring consistent load distribution and uniform torque control across 1/4" bolts. Its split design and slightly trapezoidal wire section are optimized to increase bolt tension per unit of applied torque, significantly reducing the risk of loosening due to vibration and mechanical shock. With a thickness of 0.078", outside diameter of 0.583", and inside diameter of 0.322", this washer provides a bronze-colored finish that resists tarnishing. The 100-piece pack is suitable for bulk applications requiring reliable, long-lasting fastener integrity in harsh conditions. Common uses include electrical enclosures, outdoor equipment, water treatment systems, and industrial machinery exposed to corrosive atmospheres.
  • Silicon Bronze (Alloy 651) resists dezincification, stress corrosion, and saltwater exposure
  • Hardened bearing surface (Rockwell C38-43) ensures uniform torque control and load distribution
  • Split design with trapezoidal wire section increases bolt tension per unit of applied torque
  • Reduces loosening from vibration and mechanical shock in harsh environments
  • Bronze finish resists tarnishing; dimensions: 0.078" thick, 0.583" OD, 0.322" ID
  • Packaged 100 pieces per box

Specifications

Application
Provides a hardened bearing surface, creating more uniform torque control and load distribution.
Color
Bronze
Inside Diameter
0.260" IN
Material
Silicon Bronze
Material
Silicon Bronze (Alloy 651)
Material
Silicon
Outside Diameter
0.487" IN
Rockwell Hardness
C38 - 43
Series
42525
Size
1/4"
Size
0.487 in OD x 0.260 in ID x 0.062 in thick
Size
0.487 in OD, 0.260 in ID, 0.062 in thick
Size
0.078 in thick, 0.583 in OD, 0.322 in ID
Size
0.583 in OD, 0.322 in ID, 0.078 in thick
Size
[object Object]
Size
1/4 Inch
Special Features
Applies greater bolt tension per unit of applied torque. Resists loosening caused by vibration and corrosion.
Thickness
0.062" IN
Type
Split Lock Washer
Package Weight (Imperial)
0.22 lbs
Split lock washer for #12 fasteners. It is made of silicon bronze with a bronze color finish. The washer has an inside diameter of 0.227", a thickness of 0.056", and an outside diameter of 0.377".

42517J

Split lock washer for #12 fasteners. It is made of silicon bronze with a bronze color finish. The washer has an inside diameter of 0.227", a thickness of 0.056", and an outside diameter of 0.377".
3/8 Split Lock Washer Silicon Bronze.

SBSLW38-C

3/8 Split Lock Washer Silicon Bronze.
Washer, Lock, Size 1/4 Inch, Stainless Steel

E148-1/4SS

Washer, Lock, Size 1/4 Inch, Stainless Steel
A coiled, hardened split circular lock washer with a slightly trapezoidal wire section. It is made of silicon bronze and has a bronze color. The washer measures 0.056 in thick, with a 0.377 in outside diameter and a 0.227 in inside diameter.

42517

A coiled, hardened split circular lock washer with a slightly trapezoidal wire section. It is made of silicon bronze and has a bronze color. The washer measures 0.056 in thick, with a 0.377 in outside diameter and a 0.227 in inside diameter.
A coiled, hardened, split circular washer with a slightly trapezoidal wire section. It is made of silicon and finished in bronze. Key dimensions are 0.078 in thickness, 0.583 in outside diameter, and 0.322 in inside diameter.

42530

A coiled, hardened, split circular washer with a slightly trapezoidal wire section. It is made of silicon and finished in bronze. Key dimensions are 0.078 in thickness, 0.583 in outside diameter, and 0.322 in inside diameter.
A coiled, hardened, split circular lock washer with a slightly trapezoidal wire section. It is made of silicon and has a bronze color. The washer has a thickness of 0.047 in, an outside diameter of 0.334 in, and an inside diameter of 0.200 in.

42515

A coiled, hardened, split circular lock washer with a slightly trapezoidal wire section. It is made of silicon and has a bronze color. The washer has a thickness of 0.047 in, an outside diameter of 0.334 in, and an inside diameter of 0.200 in.
A 5/8 inch split lock washer made of silicon bronze. It is bronze in color and has an outside diameter of 1.073 in, an inside diameter of 0.641 in, and a thickness of 0.156 in. The washer is intended to provide a hardened bearing surface, more uniform torque control, and load distribution while resisting loosening from vibration and corrosion.

42545

A 5/8 inch split lock washer made of silicon bronze. It is bronze in color and has an outside diameter of 1.073 in, an inside diameter of 0.641 in, and a thickness of 0.156 in. The washer is intended to provide a hardened bearing surface, more uniform torque control, and load distribution while resisting loosening from vibration and corrosion.
A split lock washer with a coiled, hardened, split circular form and a slightly trapezoidal wire section. It is made of silicon bronze and has a bronze color. The washer measures 0.031 in thick, 0.250 in outside diameter, and 0.148 in inside diameter.

42505

A split lock washer with a coiled, hardened, split circular form and a slightly trapezoidal wire section. It is made of silicon bronze and has a bronze color. The washer measures 0.031 in thick, 0.250 in outside diameter, and 0.148 in inside diameter.

Frequently Asked Questions

Where are Minerallac 42525 lock washers manufactured?

Minerallac 42525 lock washers are manufactured in the USA.

What material is the Minerallac 42525 lock washer made from?

The Minerallac 42525 lock washer is made from silicon bronze, which offers excellent corrosion resistance.

What size bolt is compatible with the Minerallac 42525 lock washer?

The Minerallac 42525 lock washer is compatible with standard 1/4-inch bolts and screws.

What are the primary applications for silicon bronze lock washers?

Silicon bronze lock washers are ideal for applications requiring high corrosion resistance, such as marine, outdoor, and electrical environments.

How does a split lock washer prevent loosening?

A split lock washer creates tension against the bolt head and mating surface, effectively preventing loosening caused by vibration.

Frequently Asked Questions about Minerallac Company

What are the main product lines offered by Minerallac Company?

Minerallac Company offers multiple comprehensive product lines including Minerallac Traditional (electrical fasteners), Strut Fittings, Stainless Steel Fasteners, Black Claw, Impact Staples, and Redmore. Their Traditional line features over a thousand electrical fastener variations covering conduit/cable/wire products, nail straps, beam clamps, metal stud & drywall accessories, acoustical supports, voice/data hardware, and miscellaneous electrical installation components.

What is Minerallac Company's warranty policy?

Minerallac Company provides a limited warranty that guarantees all products are free from defects in material and workmanship. If a product fails to meet this warranty, Minerallac's sole liability is to replace the product at no charge. The warranty is exclusive and does not cover consequential damages, lost profits, or implied warranties of merchantability or fitness for a particular purpose.

What industries and applications are Minerallac Company products used for?

Minerallac Company products are used extensively across electrical, construction, and industrial applications, including conduit and cable support, beam mounting, metal stud and drywall installation, voice/data infrastructure, and low voltage systems. Their product lines cover critical fastening solutions for electrical contractors, with specialized offerings in conduit hangers, straps, beam clamps, cable supports, and mounting hardware for various industrial environments.

What technical support does Minerallac Company offer?

Minerallac Company offers comprehensive technical support through multiple channels, including a toll-free customer service line at 800-927-3293, email support at [email protected], and online resources at www.minerallac.com. Their support covers product selection, technical specifications, and customer service for their extensive line of electrical fasteners, hangers, straps, and hardware across multiple product brands including Minerallac Traditional, Cully, Black Claw, IMPACT Staples, and Minerallac Stainless Steel. Support hours are 8:00 A.M. to 5:00 P.M. CT for their corporate office and 8:00 A.M. to 5:00 P.M. PT for their regional office.

What are the key features of Minerallac Company products?

Minerallac Company products feature a comprehensive range of electrical fasteners and hardware with exceptional versatility, including over 1,000 different sizes, styles, and finishes. Key features include multiple product lines such as Traditional, Strut Fittings, and Stainless Steel options with specialized finishes like 304/316 Stainless Steel, Hot-Dipped Galvanized, and Zinc Electroplate. Their products are engineered for electrical contractors, offering time-saving solutions with high-quality fasteners designed for durability, corrosion resistance, and worker safety across various installation environments.

What environmental ratings do Minerallac Company products have?

Minerallac Company products have robust environmental ratings, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13 certifications, CSA Type 1-4X, 12, and 13 ratings, and IEC 60529 IP66 protection. The products are WEEE and RoHS compliant, with UV and oil resistance, and can operate in extreme temperatures ranging from -55°C to 105°C, making them suitable for harsh industrial environments.

What accessories are available for Minerallac Company products?

Minerallac Company offers a comprehensive range of accessories across multiple product categories, including hardware, fasteners, and mounting solutions. Key accessories include stove bolts with nuts, wing nut washers, bar joist washers, stud clip adapters, brackets, perforated strapping, cable support options like J-hooks and bridle rings, box mounting brackets, outlet retainers, and various stud and drywall supports. Their accessories are available in multiple finishes such as stainless steel, hot-dipped galvanized, zinc electroplate, and powder-coated options.

How are Minerallac Company products typically installed?

Minerallac Company products are typically installed using a variety of specialized fastening solutions, including conduit hangers, straps, beam clamps, and mounting brackets designed for different electrical and construction applications. Installation methods vary by product type, with options for metal studs, drywall, beams, acoustical surfaces, and low voltage systems. The company offers multiple installation styles such as one-hole and two-hole straps, universal beam clamps, and specific mounting hardware to ensure secure and efficient attachment across diverse electrical and construction environments.

What communication protocols do Minerallac Company products support?

Minerallac Company's Brad product line supports multiple industrial communication protocols, including Ethernet, DeviceNet, PROFIBUS, Modbus, CANopen, Serial, AS-interface, and CC-Link. Their comprehensive portfolio covers over 40 industrial protocols, providing flexible communication solutions for various industrial automation applications from PC-based control to PLC systems.