Authorized Minerallac Company Distributor
Minerallac Company 40915SSJ - Belleville specialty washers for 3/8" bolt sizes. They are made of 18-8 stainless steel / 301 stainless steel and have a zinc plated finish. The washer has an outside diameter of 0.750", an inside diameter of 0.390", and a thickness of 0.050".
Minerallac Company

40915SSJ

Alternate Item Number: 13852905

UPC: 085937037923


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Minimum Qty: 100

Multiplier: 100

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Overview

The Minerallac Company 40915SSJ 3/8" Belleville Washer is manufactured from Type 18-8 stainless steel, providing corrosion resistance and high strength for demanding industrial applications. These conical spring washers maintain consistent clamping force under vibration and thermal cycling, preventing bolt loosening in critical assemblies. Ideal for use with 3/8" bolts in electrical, mechanical, and structural systems where reliability is paramount. The 18-8 stainless steel composition ensures resistance to oxidation and chemical exposure, making these washers suitable for outdoor and harsh environment installations. Each washer is precision-formed to deliver uniform load distribution across mating surfaces, reducing stress concentrations and extending joint lifespan. Compatible with standard 3/8" hardware, these washers are commonly specified in electrical panel assemblies, machinery mounting, and structural connections where vibration resistance is required. The Belleville design provides a spring-like action that compensates for thermal expansion and material relaxation over time.
  • Material: Type 18-8 Stainless Steel for corrosion resistance
  • Size: 3/8" diameter for standard bolt compatibility
  • Belleville design maintains clamping force under vibration
  • High strength for critical industrial and structural applications
  • Precision-formed for uniform load distribution

Specifications

APW (Each)
0.00388
Def Nom
0.026"
Def Nom
0.018"
Finish
Zinc Plated
Fits Bolt Sizes
3/8" IN
Flat Load LL
450
Flat Load UL
550
ID (Min)
0.380"
ID (Min)
0.38"
Inside Diameter
0.390" IN
LBS F 100%
500
Material
301 Full-Hard Stainless Steel
Material
Stainless Steel-301
OD (Max)
0.755"
OH Ref
0.058"
Outside Diameter
0.750" IN
Thickness
0.050" IN
THK Nom
0.040"
Torque FT
3.1 ft/lbs
Torque FT
4.00/ lbs
Type
Specialty Washers
Package Weight (Imperial)
0.2 lbs
A Belleville washer, or disc spring, used singly or in stacks to achieve a desired load and travel. It is made of stainless steel. The washer fits 3/8 in bolt sizes and has a 0.750 in outside diameter, 0.390 in inside diameter, and 0.050 in thickness.

40915SS

A Belleville washer, or disc spring, used singly or in stacks to achieve a desired load and travel. It is made of stainless steel. The washer fits 3/8 in bolt sizes and has a 0.750 in outside diameter, 0.390 in inside diameter, and 0.050 in thickness.
Belleville Spring Washer, 5/8 Inch Bolt Size, Steel with Zinc Chromate Finish

60804-TB

Belleville Spring Washer, 5/8 Inch Bolt Size, Steel with Zinc Chromate Finish
Belleville washers for 3/8" bolt sizes. They are made of spring steel with a zinc plated finish. The washer has an inside diameter of 0.386" and an outside diameter of 1.063". Thickness is 0.082".

40915J

Belleville washers for 3/8" bolt sizes. They are made of spring steel with a zinc plated finish. The washer has an inside diameter of 0.386" and an outside diameter of 1.063". Thickness is 0.082".
Belleville washers for 5/16" bolt sizes. Made of spring steel with a zinc plated finish. The washer has an inside diameter of 0.322" and an outside diameter of 1.063". Thickness is 0.082".

40910J

Belleville washers for 5/16" bolt sizes. Made of spring steel with a zinc plated finish. The washer has an inside diameter of 0.322" and an outside diameter of 1.063". Thickness is 0.082".
Belleville washers made of spring steel with a zinc plated finish. They fit 3/8" bolt sizes and have an inside diameter of 0.386" and an outside diameter of 1.063". The thickness is 0.082". The sheet lists a torque value of 17.9 ft/lbs and flat load values of 2700 to 3300.

40915BFG

Belleville washers made of spring steel with a zinc plated finish. They fit 3/8" bolt sizes and have an inside diameter of 0.386" and an outside diameter of 1.063". The thickness is 0.082". The sheet lists a torque value of 17.9 ft/lbs and flat load values of 2700 to 3300.
Belleville washers for 3/8" bolt sizes. They are made from Steel - 6150 and have a zinc plated finish. The sheet lists an inside diameter of 0.386", an outside diameter of 1.188", and a nominal thickness of 0.091".

40915HDJ

Belleville washers for 3/8" bolt sizes. They are made from Steel - 6150 and have a zinc plated finish. The sheet lists an inside diameter of 0.386", an outside diameter of 1.188", and a nominal thickness of 0.091".
Belleville washers for 1/2" bolt sizes. Made from Steel-1074 with a zinc plated finish. The sheet lists a 0.515" minimum inside diameter, 1.188" maximum outside diameter, and 0.125" nominal thickness.

40925HDJ

Belleville washers for 1/2" bolt sizes. Made from Steel-1074 with a zinc plated finish. The sheet lists a 0.515" minimum inside diameter, 1.188" maximum outside diameter, and 0.125" nominal thickness.
Belleville washers in a heavy duty style for 1/2" size applications. The sheet identifies them as made of spring steel and supplied in carton quantity. This product is listed as catalog number 40925HDBFG.

40925HDBFG

Belleville washers in a heavy duty style for 1/2" size applications. The sheet identifies them as made of spring steel and supplied in carton quantity. This product is listed as catalog number 40925HDBFG.

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.