Neoprene Washer Hillman 4329 Large 3/4‑ID x 2‑1/4‑OD 6‑Pack

Description

Product Overview

The Hillman 4329 neoprene washer is a precision‑engineered sealing component that combines the resilience of neoprene with a flat, plain‑finished design. Each washer measures 2.25 inches in outside diameter, 0.75 inches in inner diameter, and 0.13 inches in thickness, providing a generous bearing surface that spreads load evenly across the fastening area. The black neoprene material is formulated to resist oil, grease, food‑grade acids, solvents, and a wide range of chemicals, making these washers ideal for industrial, scientific, and maintenance applications where a reliable seal is critical.

Packaged in a six‑piece set, the washers are lightweight (approximately 0.15 pounds per pack) yet robust enough to withstand repeated compression cycles without permanent deformation. The plain exterior finish ensures a smooth interface with mating surfaces, reducing the risk of abrasion or material wear. Designed for a 3/4‑inch fastener size, the washers fit standard bolts, screws, and nuts commonly used in equipment assemblies, pipe fittings, and machinery housings.

Usage

These neoprene washers excel in environments where exposure to oils, greases, acids, and solvents is routine. Typical use cases include hydraulic and pneumatic systems, automotive engine compartments, food‑processing equipment, laboratory apparatus, and chemical processing plants. The washers act as a barrier that prevents fluid leakage, protects metal fasteners from corrosive agents, and cushions vibration‑induced stresses, thereby extending the service life of both the fastener and the surrounding components.

Installation is straightforward: place the washer between the fastener head and the mating surface, then tighten the bolt or screw to the recommended torque. The washer’s 0.13‑inch thickness provides enough compression to create a seal without over‑compressing the neoprene, which could otherwise lead to premature wear. Because the material is non‑porous and chemically inert, the washers can also be used in clean‑room settings where contamination control is essential.

Why Choose Us

Hillman is a trusted brand with decades of experience in fastener and sealing solutions. The 4329 neoprene washer benefits from Hillman’s rigorous quality‑control processes, including material testing for tensile strength, compression set, and chemical resistance. Each batch is inspected for dimensional accuracy to ensure consistent performance across all units. Our commitment to durability means you receive a product that maintains its sealing capability even after prolonged exposure to harsh chemicals and temperature fluctuations.

In addition to product quality, Hillman offers responsive customer support and a clear return policy. If you encounter any issues with fit or performance, our technical team is ready to provide guidance, replacement parts, or troubleshooting assistance. This level of service underscores our confidence in the product and our dedication to customer satisfaction.

Key Features

• Chemical‑resistant neoprene material protects against oil, grease, acids, and solvents.
• Generous 2.25‑inch outer diameter provides a large bearing surface for even load distribution.
• Flat, plain finish minimizes abrasion and ensures smooth contact with mating parts.
• Lightweight six‑piece pack offers cost‑effective inventory for frequent maintenance tasks.
• Hillman’s dedicated support team provides expert assistance and hassle‑free returns.

FAQ

What size fasteners are compatible with the 4329 washer?

The washer is designed for a 3/4‑inch fastener size, meaning it fits bolts, screws, and nuts with a 3/4‑inch shank diameter. The inner diameter of 0.75 inches aligns with this standard size, ensuring a snug fit without excessive play.

Can these washers be used in food‑processing environments?

Yes. The neoprene material is formulated to resist food‑grade acids and is non‑porous, making it suitable for applications where hygiene and chemical resistance are required. However, always verify compliance with local food‑safety regulations before use.

How many washers are included in each package?

Each package contains six individual washers, providing a convenient quantity for multiple installations or for keeping spares on hand.

Are the washers reusable after removal?

Neoprene washers can be reused if they have not been damaged or excessively compressed. Inspect the washer for any cuts, tears, or permanent deformation before reinstallation. For critical sealing applications, it is recommended to replace the washer to guarantee optimal performance.

What is the temperature range for these neoprene washers?

The neoprene formulation used by Hillman typically operates effectively from -40 °F (‑40 °C) up to 250 °F (121 °C). This range covers most industrial and laboratory environments, but always confirm the specific temperature requirements of your application.