400768-0012 5/16 NF-Left Shaft Nut for T1238 Turbocharger (CAT D342 6L)

This 400768-0012 5/16 NF-Left Shaft Nut is an aftermarket replacement component for T1238 turbochargers, commonly associated with CAT D342 6L engines and CAT 583K heavy equipment. Designed for rebuilders and fleet maintenance, this part supports the secure assembly of the turbocharger shaft. Verify part number and application details before ordering to ensure proper fitment.

Key Specifications

• Part Number: 400768-0012 5/16 NF-LEFT
• Product Type: Shaft Nut
• Turbo Model: T1238
• Thread Specification: 5/16 NF-Left
• Gross Weight: 0.03 kg
• Reference Application: CAT D342 6L, CAT 583K
• Image Available: Yes

Application & Compatibility

This shaft nut is listed for use with T1238 turbocharger assemblies. It is associated with the following engine and vehicle applications for reference purposes:

• Engine: CAT D342 6L
• Vehicle: CAT 583K

Buyers must verify the specific turbocharger model, engine code, and vehicle production year before ordering. OEM reference numbers should be cross-checked against your existing unit to confirm the correct thread direction (Left) and size. This is a replacement application part; fitment is not guaranteed without verification.

Technical Notes

The 5/16 NF-Left thread specification is critical for proper installation on the T1238 turbocharger shaft. Ensure the replacement nut matches the original thread pitch and direction to prevent assembly issues. This component is a mechanical fastener used in turbocharger rebuilds. Verify the condition of the shaft threads before installation. No specific VNT or cooling system details are provided for this component; verify per application.

B2B Supply

LeadTurbo provides technical fitment support for turbocharger parts and components. Volume pricing is available for distributors, repair shops, and fleet buyers. We offer worldwide shipping for aftermarket replacement parts. Contact our technical team to verify part numbers and discuss bulk order requirements.