Hexagon Flange Head Screw
The 3944593 Hexagon Flange Head Screw (Cummins) is a critical fastener used primarily to secure the exhaust manifold to the cylinder head on Cummins B-series and ISC engines. This high-strength bolt ensures a tight seal under high-heat conditions, reduces the risk of exhaust leaks, and maintains structural integrity in heavy-duty truck applications.
$5.20
Specifications
The 3944593 Hexagon Flange Head Screw by Cummins is engineered to deliver reliable fastening performance in heavy-duty engine applications. Designed for exhaust manifold mounting, its flange head distributes load evenly, reducing stress and ensuring tighter clamping — even under extreme heat cycles. This bolt is typically used on 5.9L B-series Cummins engines and other compatible platforms. Its durable construction resists vibration and loosening, helping prevent exhaust leaks that can impair engine efficiency. Ideal for engine rebuilds, maintenance, or repair, this OEM-grade screw is a trusted component for mechanics and fleet technicians alike.
Weight
0.107
Compatibility
Dodge / Ram 2500-3500 (5.9 L Cummins) – 1989–2018
Freightliner trucks with Cummins B-Series engines
Case-IH equipment using Cummins B-series (bolt listed in parts catalog)
Other vocational and heavy-duty trucks running Cummins B or ISB / ISC engines
Freightliner trucks with Cummins B-Series engines
Case-IH equipment using Cummins B-series (bolt listed in parts catalog)
Other vocational and heavy-duty trucks running Cummins B or ISB / ISC engines
Alternative Part Numbers
3944593
Cummins 3944593
Screw, Manifold 3944593
M-3944593
Cummins 3944593
Screw, Manifold 3944593
M-3944593
