This genuine Cummins hexagon flange head cap screw is designed primarily for exhaust manifold mounting, providing a larger contact area to distribute load evenly for a stronger, secure fastening. Compatible with a wide range of Cummins diesel engines—including 5.9L B Series (ISB), 4B 3.9L and 6B 5.9L, 6.7L B Series (ISB/QSB), ISC, and ISL—it ensures leak-free sealing under high-heat and high-vibration conditions. It also fastens turbochargers and related components, securing critical engine parts in demanding environments.
Supersessions
CUMMINS 3944593
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- Local Delivery: We provide local delivery to any business located within 50 miles of one of our locations.
- In-Store Pickup: You can pick up your order at any of our ten Ohio Peterbilt locations.
- Oversized Parts: These parts require LTL shipping, and may have other shipping restrictions. If you'd like to schedule other delivery options, please contact us at (440) 586-4528.
Standard Returns (Stock Items) Ohio Peterbilt accepts returns of stock truck parts within 30 days of purchase, provided the items are new, unused, and in resaleable condition with original packaging and all components intact. A copy of the original sales receipt or invoice should accompany the return to verify the purchase date.
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