500168-2 – Lube Zerk Fittings – Hex 438″ – Overall Len 0.66″ – Thread Size .125-27NPT

SKU: 500168-2

$1.31

3 in stock

Description

500168-2 grease zerk .125-27NPT thread. Hex 0.438″, OAL 0.66″. Pipe-thread NPT zerk — for grease ports using 1/8″ NPT threads rather than .250-28 machine thread.

Full Description

500168-2 is a grease zerk fitting with .125-27NPT (1/8" NPT pipe thread) rather than the .250-28 machine thread used on most driveshaft U-joints. NPT-thread grease ports are found in industrial equipment, some agricultural components, and aftermarket-machined parts where the port was tapped with a pipe-thread tap rather than a .250-28 machine thread tap. These two thread types are not interchangeable.

  • Thread: .125-27NPT (1/8" NPT pipe thread)
  • Hex: 0.438"
  • Overall Length: 0.66"

NPT threads are tapered -- they tighten by wedging as the fitting is driven deeper, sealing on the thread flanks. Machine-thread zerks (.250-28) use straight threads. Attempting to install an NPT fitting in a machine-thread port will either not engage or will cross-thread the port. Always identify the thread type before ordering replacement zerks.

See all universal joints for greaseable driveshaft U-joints and companion lube fittings.

Additional information
Hex438
Overall len0.66
Partn number500168-2
Thread size.125-27NPT

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500174-2 driveshaft part image - 500174-2 – Lube Zerk Fittings – Hex 312" – Overall Len 0.68
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Lube Zerk Fittings (7)
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