Product Description
3/8" Self-Colour Steel Manifold Studs with Brass or Copper Nuts
3/8" self-colour steel manifold studs supplied with a matching brass or copper nut. Available with UNC coarse or UNF fine threads for exhaust manifolds, inlet manifolds, classic vehicles, motorcycles and vintage machinery.
The UNC versions have 3/8"-16 threads, while the UNF versions have 3/8"-24 threads. Four stud lengths and dimensional patterns are available, so the original stud should be measured before selecting a replacement.
Product Features
- Nominal thread diameter: 3/8"
- Stud material: self-colour steel
- Available with brass or copper nut
- UNC coarse-thread options: 16 TPI
- UNF fine-thread options: 24 TPI
- Four imperial stud lengths available
- Suitable for manifold, exhaust and restoration applications
- Useful for cars, motorcycles and vintage machinery
- Available in packs of 1, 5, 10, 20, 50 or 100
Nut Material
These studs can be supplied with a brass or copper nut. There is currently no nut-material dropdown on the product page, so please add a message to your order stating which nut material you require.
Selection and Installation
UNC and UNF threads have different pitches and must not be interchanged. Confirm the thread in the manifold or cylinder head, measure the original stud and select the corresponding length and dimensional pattern.
Self-colour steel does not have a protective zinc-plated finish and may require appropriate storage or corrosion protection. Always follow the vehicle or equipment manufacturer's tightening sequence and torque specification.
Browse our other manifold fasteners and manifold nuts, or consult our thread data guide.

| A | B | C | D | E |
| 3/8" | 10.9mm | 23.5mm | 9.5mm | 16TPI |
| 3/8" | 11mm | 22.2mm | 12.7mm | 24TPI |
| 3/8" | 11.7mm | 20.5mm | 5.8mm | 16TPI |
| 3/8" | 15mm | 21.2mm | 13.6mm | 24TPI |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.