What blade steel does the Nieto 131 Semper Fi 4 use and how does it hold up in harsh Australian outdoor conditions?

The Nieto 131 Semper Fi 4 is crafted from Austrian Böhler N690Co cobalt-alloyed stainless steel with a blade hardness of 58-60 HRC. This high-performance steel provides exceptional edge retention, wear resistance, and high corrosion resistance, making it exceptionally reliable in wet coastal environments or arid Australian outback conditions.

Is the Nieto 131 suitable for heavy-duty bushcraft tasks like batoning wood?

Yes, with its robust 4.2 mm thick spine and full-tang construction, the 11 cm blade is capable of moderate camp tasks including wood carving, notching, and light batoning. However, for heavy-duty felling or aggressive chopping, larger blades over 17 cm are recommended.

What are the legal requirements for carrying or owning a fixed-blade knife like the Nieto Semper Fi in Australia?

As a standard manual outdoor knife, it is legal to import and purchase without firearm registry permits. However, strict state and territory knife laws apply, meaning it must be transported or carried only with a reasonable excuse or lawful purpose such as hunting, camping, or professional bushcraft.

How should I maintain and care for the Böhler N690Co blade and G10 handle scales?

Maintenance is straightforward due to the corrosion-resistant nature of both the stainless steel blade and the textured G10 handle slabs. Simply clean the blade with fresh water and mild soap after field dressing or food prep, dry it thoroughly before sheathing, and occasionally apply a light coat of food-safe oil to maintain the finish and longevity.

Fixed Blade Knife - Nieto N-131

The Miguel Nieto 131 Semper Fi 4 is a heavy-duty, full-tang tactical hunting knife manufactured in Albacete, Spain. Built with a stout 4.2 mm spine and an 11.0 cm clip-point blade made from Austrian Böhler N690Co stainless steel, it delivers a balance of wear resistance, corrosion resistance, and piercing performance for demanding field applications. Ergonomic, textured black G10 handle scales ensure a secure grip during wet or tactical use, while the included multi-position sheath facilitates reliable belt carry across Australian outdoor environments.

Key Features

Full-Tang Böhler N690Co Construction: Cobalt-alloyed stainless steel hardened to 58–60 HRC provides edge retention and corrosion resistance against harsh weather and moisture.
Heavy-Duty 4.2 mm Spine: Offers the structural strength required for wood carving, notching, and moderate batoning tasks around camp.
Ergonomic G10 Handle Scales: Textured composite slabs deliver a non-slip grip in wet conditions and resist rotting, cracking, and temperature extremes.
Clip-Point Profile: Features a plain edge and fine tip designed for slicing, precision piercing, and utility cutting.
Multi-Position Belt Sheath: Enables safe carry and quick deployment on standard belts.

Specifications

Blade Length: 11.0 cm (110 mm)
Blade Thickness: 4.2 mm
Handle Length: 11.5 cm
Overall Length: 22.5 cm
Blade Steel: Böhler N690Co stainless steel
Blade Hardness: 58–60 HRC
Blade Profile: Clip point, plain edge
Handle Material: Black textured G10
Construction: Full tang

Who is the Nieto Semper Fi 4 11cm for?

Bushcraft and Survival Practitioners — requires a full-tang tactical hunting knife with a 4.2 mm thick spine and an 11.0 cm blade capable of handling moderate batoning, wood notching, and heavy camp chores.
Hunters — benefits from Böhler N690Co stainless steel hardened to 58–60 HRC, which provides corrosion resistance and edge retention across medium-game field dressing and hide slicing.
Tactical and Military Personnel — relies on the 22.5 cm overall length and non-slip textured G10 scales of this tactical fixed blade for controlled utility cutting and precision piercing.

Less suitable for: Heavy felling or machete-style chopping tasks that require a larger blade over 17 cm, or fine detailing and small-game caping tasks that are better served by a shorter, thinner 7 to 8 cm caping knife.

SKU	NO40282LP
Model #	N-131
Brand	Nieto
Shipping Weight	1.0000kg

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Nieto N-131 Semper Fi 4 Fixed Blade Knife 11cm N690 Steel

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