This is the oil fill vent plug seal for axle hub caps manufactured by National.

Part # B299

Type: Slit-Style

National has built a reputation as one of the most respected names in the industry. They have offered premium sealing solutions for more than 70 years. Their design team keeps pace with the industry and provides advanced solutions for today's vehicles. Unbeatable Protection for Wheel End Systems from the The Leader in Wheel End Technology(TM) Unique slit style vent plug Dramatically reduces contamination

Material: Nitrile

Replacement plug for National oil fill hub caps.

For use with Part No. 73980

For use with a 1.147 diameter hole.

May be used to replace red seal.

Cross References

UNSPSC CODES: 25171905

VMRS (ATA) CODES: 018-003-019 (Fill Plug - Hubcap (Oil))