Exhaust Manifold Brass Nut
Originally Fitted to Ford GPA GPW, Willys MB Slat Grill and MB.
Our Exhaust Manifold Nuts have been made from brass instead of the original steel ones as they have a tendency to weld themselves to the studs due to high heats from the engine.
7 nuts required per vehicle.
Exhaust manifold brass nut
3/8"-24NF
Brass nut for securing the exhaust manifold to the cylinder head. Brass is used instead of steel because it does not seize onto the stud due to the high temperatures of the engine. This significantly facilitates subsequent removal.
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Material Brass |
Thread 3/8"-24 NF (fine thread) |
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Application Exhaust manifold mounting |
Packaging Per piece |
Features
- Manufactured from brass for superior heat resistance
- Prevents seizing to the stud due to high engine temperatures
- Facilitates subsequent removal during maintenance
- 3/8"-24NF fine thread
- Suitable for use with bevelled bridging washers
★ High-quality brass nut fitted as standard on WWII military vehicles. Brass is the recommended material for exhaust fastenings due to its thermal properties and ease of removal after years of service.
Installation notes
Tighten by hand until lightly seated. Do not use excessive force — brass is softer than steel. When using with bridging washers: fit the bevelled washer first, then the nut. Check tightness annually.
Compatibility
Note: different vehicles use different nuts. Early MB/GPW use standard brass nuts with bevelled bridging washers (GPW-9443/WO-344732). Later M38/M38A1/CJ models often use self-locking brass nuts. Check which type your vehicle requires.
Historical context
Originally, steel nuts were used, but these tended to seize onto the studs due to the extreme heat from the exhaust. From the production of the MB/GPW onwards, brass became the standard for this application.
This description was generated automatically. Unsure about fitment? Contact us at info@willys.be.
⚠ Spotted an error in this description? Report it to info@willys.be
This part is intended for the restoration of historic military vehicles. Fitting, aligning, deburring or reworking is part of that work and is inherent to the nature of these goods. Dimensional variation also exists between original vehicles.
Installation requires technical knowledge of the vehicle. Unsure whether this part suits your version? Ask us before purchase at info@willys.be.
ALL_CATEGORIES : BOLTS 01 ENGINE, EXHAUST COLLECTOR - CJ2A, EXHAUST COLLECTOR - CJ3A, EXHAUST COLLECTOR - M38, EXHAUST COLLECTOR - M38A1, EXHAUST COLLECTOR - CJ3B
📐 Diagrams & technical drawings
From the original Technical Manual CJ2A_PL_1949 — Parts List — only for Willys CJ-2A / CJ-3A (1949)
From the original Technical Manual TM 10-1513 — Maintenance Manual — only for Willys MB / Ford GPW (1942)
