Description
Keep your fuel, oil, or brake lines locked in tight with the Aeroquip Alum #4 Locknut in Black (FCM5099) — a precision-engineered bulkhead nut built for serious performance applications. The sleek black anodized finish not only looks great under the hood but also provides excellent corrosion resistance for long-lasting durability. Sold as a pair, these locknuts give you everything you need to get the job done right the first time.
- MPN: FCM5099
- Type: Bulkhead fitting nut
- Size: 4 AN
- Material: Aluminum
- Finish: Black anodized
- Quantity: Sold as a pair
- Brand: Aeroquip
Whether you’re building a race car, restoring a classic, or upgrading a street machine, the Aeroquip FCM5099 locknut is a trusted choice among performance enthusiasts who refuse to compromise on quality.






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