Great Neck FNW16 Flare Nut Wrench 16 x 18mm
- Jaw Capacity: 0.7 inches
- Measurement Standard: Metric
- Head Style: Flare Nut
- Item Length: 3.3 inches
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A useful add-on for a toolbox that already covers 18mm elsewhere, picked up specifically for its compact size rather than as a primary wrench.
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ASIN: B000CMJIBIModel: FNW16Category: Wrenches
Overview
The Great FNW16 is a compact wrench, just 85 millimeters long and weighing about 4 ounces, sized for an 18-millimeter fastener. Its small footprint points to a tool meant for tight clearances rather than heavy leverage work.
At under three and a half inches long, this wrench trades leverage for reach into tight spaces where a standard-length wrench won't fit. The 18mm capacity narrows its use to that one fastener size, so it works best alongside a broader set rather than as a standalone tool.
- 18-millimeter capacity
- 85-millimeter overall length
- 4-ounce weight
- Great brand
Who it's for
Fits mechanics and technicians who occasionally need to reach an 18mm nut or bolt in a cramped space where a full-size wrench won't turn. Not a fit for anyone needing high torque, since the short length limits leverage.
Pros and cons
- Short length reaches into tight clearances
- Light at 4 ounces, easy to carry
- Limited leverage for high torque fasteners
- Single 18mm size only
Performance notes
At 85mm long, the FNW16 offers far less leverage than a standard combination wrench, the tradeoff for fitting into confined spaces. The 4-ounce weight keeps it easy to carry in a pocket or small kit without adding bulk.
Specifications
| Brand | Great Neck |
|---|---|
| Model | FNW16 |
| Dimensions & fit | |
| Item Length | 3.3 incheslower than 81% of 371 wrenches |
| Item Weight | 0.25 poundslower than 84% of 356 wrenches |
| Capacity & performance | |
| Jaw Capacity | 0.7 incheslower than 50% of 165 wrenches |
| Construction & materials | |
| Material Type | Alloy Steel |
| Color | Chrome |
| Finish Types | Polished |
| Included components | |
| Package Quantity | 1 |
| Unit Count | 1 |
| Included Components | 16 X 18 Millimeter Flare Nut Wrench |
| Warranty & support | |
| Manufacturer Warranty Description | GreatNeck Limited Lifetime Warranty |
| Other details | |
| Measurement Standard | Metric |
| Head Style | Flare Nut |
| Operation Mode | Mechanical |
| Item Type Name | 16 X 18 Millimeter Flare Nut Wrench |
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Frequently asked questions
What size fastener does the Great FNW16 fit?
It is sized for 18-millimeter fasteners.
How long is the FNW16 wrench?
It measures 85 millimeters, shorter than a standard wrench.
How much does it weigh?
About 4 ounces.