Description
Comparison points and tradeoffs
When comparing Aluminum 45 Degree 3/8 NPT Male to 5/8′(15.8mm) Hose Barb Push On Fitting Adapter, Black with other Fittings options, use this source-backed detail as the primary discriminator: Package Dimensions: 3.5 x 2.44 x 0.79 inches.
Use this second fact to evaluate the tradeoff: Size: 3/8 NPT to 5/8 Barb. A third point to compare across alternatives is: Item Weight: 1.44 ounces.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
| Size | 3/8 NPT to 5/8 Barb |
|---|---|
| Material | Aluminum |
| Brand | KRD PERFORMANCE |
| Color | 45 degree, Black |
| Connector Type | Barb, Adapter |
| Thread Size | 3/8 |
| Exterior Finish | Aluminum |
| Thread Type | NPT |
| Number of Pieces | 1 |
| Manufacturer | KRD PERFORMANCE |
| Model | KQ45-3858_BK |
| Item Weight | 1.44 ounces |
| Package Dimensions | 3.5 x 2.44 x 0.79 inches |
| Item model number | KQ45-3858_BK |
| Manufacturer Part Number | KQ45-3858_BK |
Note: All KRD PERFORMANCE fittings and adapters are fully compatible with gasoline and alcohol based fuels
Also available in different size and color, pls contact us for more information.
Source product highlights
About this item
- Size: Male thread size of NPT: 3/8-18 NPT, OD of barb: 5/8 inch (15.9MM), 45 degree
- Material: Made of high performance lightweight 6061-T6 cnc machined aluminum
- Surface treatment: Black anodized finish for durability and strength
- NPT thread to push on hose barb reusable tube adaptor
- Precision machined to exacting tolerances for trouble-free performance




Lucas Haines –
Used on my car for a boost line, deals with the heat of the engine very well and it sees 19PSI often, great product!
Alexander –
Installed boost gauge, this fitting fits perfectly in my aluminum charge pipe on my BMW. Works great!
MC –
Nice strong little 90 degree nipple, price a little more than I wanted to pay but I couldn’t find anything in my area other than plastic.
Kevin Taylor –
The threads are 1/2 NPT but the nipple is a bit smaller than 5/8. Still sealed up properly with a hose clamp.
Joey –
Perfect
Slab Slayer –
Perfect fit and well manufactured.
Patrick –
Seems decent quality, the problem is the 5/8″ barb is more like a big 1/2″ with a ID around 5/16″.
Austin –
Ordered a 3/8 npt and 5/8 barb/15.8mm. NPT thread was right. Barb wasn’t even close.This fitting will not work with 5/8 (.625″) hose. It measures at .568 or 14.5mm and fits too loosely in the hose for a hose clamp to work properly.
SFSvettes –
Fast shipping, exactly perfect fitting as described