25X32X4TC Nitrile TC Metric Oil Seal Double-Lip Shaft Seal

High-Strength Sealing for Demanding Applications

The 25X32X4TC Nitrile (Buna-N) Metric Oil Seal in 80 Shore A durometer is designed for higher rigidity and improved wear resistance compared to standard 80 duro seals. Built with a double-lip TC profile—a garter spring–energized main lip plus a secondary dust lip—it ensures maximum sealing performance in compact housings. This tougher formulation is ideal for applications requiring enhanced stability, reduced deformation under load, and longer service life.

Operating temperature: -40° to +225°F (–40° to +107°C)

Material & Performance Details

Nitrile (NBR) is the most widely used elastomer in oil seals for its reliable balance of oil resistance, durability, and cost-effectiveness. The 80 Shore A hardness provides improved extrusion resistance, excellent sealing stability, and better performance in high-speed or high-load environments.

• Excellent resistance to: Mineral oils, greases, hydraulic fluids, water
• Limited capability with: Ozone, automotive fuels, high-temperature steam
• Not compatible with: Strong oxidizers, esters, ketones, chlorinated hydrocarbons

Sizes & Measurements

• Cross Section (CS): 4 mm (0.16 in)
• Inside Diameter (ID): 25 mm (0.98 in)
• Outside Diameter (OD): 32 mm (1.26 in)
• Part Number: 25X32X4TC

Cross References

Equivalent to many global brands and DIN standards:

• DIN 3760: TC profile
• Freudenberg: BAUM
• SKF: HMSA7
• Parker: TC
• Trelleborg: TRC
• Garlock: 94
• NOK: TC
• Dichtomatik: WAS

Applications & Use Cases

The harder 80 duro NBR compound makes this oil seal especially well-suited for:

• Gearboxes and transmissions under higher pressure
• Agricultural, construction, and turf equipment
• Automotive drive shafts and steering systems
• Small pumps and rotating machinery
• General industrial fluid power sealing

Key Specifications

• Material: Nitrile (NBR, Buna-N)
• Durometer: 80 Shore A
• Color: Black
• Certifications: Industrial grade, ISO compliant
• Temperature Range: -40° to +225°F (–40° to +107°C)
• Pressure Rating: 0–7 psi (standard TC profile)

Why Buy from The O-Ring Store LLC

Customers choose us for proven sealing expertise and supply reliability:

• ISO9001:2015 certified processes
• Large U.S. stock with fast turnaround
• Same-day shipping on in-stock items
• Custom seal sizes and materials available
• Full lot traceability & compliance documentation
• Experienced technical support staff
• Competitive pricing with uncompromising quality

FAQs

Q1: Why choose an 80 durometer seal instead of 70?
The 80 duro compound offers greater hardness, which improves wear resistance and helps prevent extrusion in higher-pressure or tighter-clearance applications.

Q2: Can this seal be used in fuel systems?
Standard NBR is not suitable for long-term fuel exposure. For gasoline or aggressive fuels, FKM (Viton®) oil seals are recommended.

Q3: What’s the difference between a single-lip and double-lip (TC) seal?
A single-lip seal retains lubricant only, while a double-lip TC seal adds a dust lip that blocks contaminants such as dirt, dust, and moisture, making it more versatile for harsh environments.