
Minerallac Company 40310-1000 Flat cut washer for use around a bolt or screw, between the fastener bearing surface and…
Alternate Item Number: 14633326
UPC: 085937053435
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Contact for Pricing
Minimum Qty: 1000
Multiplier: 1000
*Contact for lower quantities*
Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.
Overview
- Standard #8 flat cut washer for general-purpose use
- Zinc-plated for corrosion resistance
- Supplied in a convenient jar for easy storage and dispensing
- Distributes fastener loads evenly to prevent material damage
- Manufactured in the USA by Minerallac Company
Specifications
Application | between the bearing surface of the fastener and the part to which it is attached.;Washers are designed for assembly around a bolt or screw |
Color | Silver |
Finish | Zinc Plated |
Fits Bolt Sizes | #8 |
Inside Diameter | 0.196 in |
Inside Diameter | 4.9784 mm |
Material | Steel |
Outside Diameter | 0.453 in |
Outside Diameter | 11.5062 mm |
Special Features | and to span large clearance holes.;Flat washers are used to improve stress distribution |
Thickness | 0.065 in |
Thickness | 1.651 mm |
Type | Flat Cut Washer |
Package Weight (Imperial) | 1.8 lbs |

40305-1000
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40340-1000
Flat cut washer for use around a bolt or screw to improve stress distribution and span large clearance holes. It is made of steel with a zinc plated finish and is silver in color. The washer has a thickness of 0.121", an outside diameter of 1.375", an inside diameter of 0.546", and fits 1/2" bolt sizes.
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40334J
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40340USJ
Flat cut washer for use with bolts or screws, designed to improve stress distribution and span large clearance holes. It is made of steel with a zinc plated finish and is described as medium carbon, domestic, and thru-hardened for Grade 5 and Grade 8 applications. The washer fits 1/2" bolt sizes and has an outside diameter of 1.375", inside diameter of 0.546", and thickness of 0.121".Frequently Asked Questions
What are the dimensions of this flat washer?
The washer has a thickness of 0.065 inches, an outside diameter of 0.453 inches, and an inside diameter of 0.196 inches.
What material and finish does this washer have?
The washer is made of steel with a zinc-plated finish.
What bolt sizes is this washer compatible with?
This washer is designed to fit #8 bolt sizes.
What is the purpose of this flat washer?
Flat washers are used to improve stress distribution and span large clearance holes during assembly.
Is this product compliant with the Buy American Act?
The product is listed as Buy America Act Compliant and Buy American Act Compliant.
Does this product contain any Proposition 65 chemicals?
This product is in compliance with Prop65 and is not known to contain associated chemicals.
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.

