These high-performance Fluorocarbon (FKM) O-Ring barrel seals are designed specifically for Remington 1100, 11-87, and 1187 20-gauge shotguns, ensuring a precise fit and long-lasting durability. The FKM compound provides superior resistance to heat, oil, and gun-cleaning solvents, making these O-Rings ideal for maintaining reliable gas system function and preventing cycling issues. Each seal is precision molded for consistent performance and extended service life compared to standard Buna-N or generic replacements.
Operating temperature: -15°F to +400°F (–26°C to +204°C)
Material & Performance Details
- Compound: Fluorocarbon (FKM/Viton Equivalent)
- Durometer: 75A (±5)
- Color: Black
- Performance Strengths:
- Exceptional resistance to oils, fuels, and combustion residues
- Excellent high-temperature and chemical stability
- Low compression set and long-term sealing reliability
Excellent resistance to:
- Gun oils and lubricants
- Gasoline and diesel fuels
- Solvents and degreasers
- Hydraulic and transmission fluids
Limited capability with:
- Steam and hot water above 200°F (93°C)
Not compatible with:
- Ketones (acetone, MEK)
- Brake fluids (glycol-based)
Sizes & Measurements
- Cross Section (CS): 0.139" (3.53 mm)
- Inside Diameter (ID): 0.742" (18.85 mm)
- Outside Diameter (OD): 1.020" (25.91 mm)
- Part Number: K1187-20GA
- Pack Quantity: 12 Seals
Applications & Use Cases
Engineered for the Remington gas-operated shotgun family, these O-Rings provide a reliable seal between the barrel and gas piston, maintaining consistent pressure and smooth cycling. Commonly used for:
- Preventing gas leaks and cycling malfunctions
- Enhancing reliability during hunting, sporting, and target shooting
- Replacing worn or degraded factory seals
Key Specifications
- Material: Fluorocarbon (FKM)
- Durometer: 75A
- Color: Black
- Certifications: Commercial Grade Equivalent to ASTM D1414
- Temperature Range: -15°F to +400°F (–26°C to +204°C)
- Pressure Rating: Standard gas system operation
Why Buy from The O-Ring Store LLC
- ISO9001:2015 certified quality processes
- USA inventory for fast, same-day shipping
- OEM quality replacements with proven field reliability
- Custom sealing solutions available on request
- Expert technical support from experienced staff
- Competitive pricing with uncompromised quality
FAQs
1. Do these fit both Remington 1100 and 11-87 models?
Yes. These FKM O-Rings are compatible with all 20-gauge Remington 1100, 11-87, and 1187 shotguns.
2. Why choose FKM over Buna-N?
FKM offers significantly higher resistance to heat, oil, and gun solvents, ensuring longer life and fewer replacements.
3. How often should I replace the barrel seal?
For best reliability, replace the seal once per year or every 1,000 rounds, whichever comes first.
