Replacement Piston Pin Retainer for Cummins ® B/ISB/QSB Applications 4.5L Big Pin

Product Details

1 x Pin Retainer – 3939375

Fits Application: Cummins 4B Engine

Details:

Internal Retaining Ring
1.526in free O.D. x 0.05in thick
38.76mm free O.D. x 1.27mm thick

OE Replacements: 111097, 3939375

Cross References:

Application & Fitment

• Engine Make: Cummins
• Engine Model / Application: B/ISB/QSB

Confirm the original part number and engine identification before ordering. Where applicable, also verify serial-number range, production year, piston style, bearing size or other configuration notes shown in the product information.

Part Numbers & Cross References

• Interstate-McBee Reference: M-3939375

Need Help Confirming Fitment?

Use the engine model, serial number and original part number when checking compatibility. For kits and sets, review the complete component breakdown above before ordering because contents can vary by engine configuration.