Norseman 05660 Type 190-AG 3/16″ 135° Magnum Super Premium Split Point Jobber Drill Bit

Norseman 190-AG NAS 907B 3/16″ HSS Jobber Length Drill Bit, 135° Split Point (Each) – Part 05660

The Norseman 190‑A NAS 907B 3/16″ high‑speed steel jobber length drill bit is manufactured from premium hi‑molybdenum steel and finished with a nitro‑carburized surface for added wear resistance. A Magnum Super Premium 135° split point starts fast and resists walking, delivering clean, accurate holes in work‑hardening stainless steel, alloy steels, and other tough materials. Built to NAS 907B specification and stress‑relieved at low temperature, this bit is designed for reliable performance in shop and jobsite drilling.

Proudly made in the U.S.A. Sold individually by the each. If you prefer a factory full pack, order in multiples of the Qty. per/pack noted below.

Please note: The picture may not be of the actual product size. Drill bit pictures are often generic for multiple sizes, so refer to the product description for accurate information.

Norseman Type 190-AG 3/16″ 135° Split Point Jobber Drill Bit At a Glance

• 135° Split Point: Starts on contact and reduces walking for accurate holes.
• NAS 907B Spec: Manufactured to aerospace‑grade dimensional standards for consistency.
• Hi‑Molybdenum HSS: Durable cutting edges for stainless and hard steels.
• Nitro‑Carburized Finish: Surface hardening improves wear and chip evacuation.
• Low‑Temp Stress Relief: Improves lubricity and toughness in demanding use.
• Jobber Length: Balanced reach and rigidity for general drilling.
• Made in the USA: Reliable manufacturing and quality control.
• Size & Part No.: Labeled as 3/16″ – Part 05660 for easy search on our site

Markets

• Metal Fabrication: Daily drilling in stainless, mild steel, and structural work.
• Maintenance & Repair (MRO): Reliable bit for shop repairs and field service.
• Construction Trades: Drilling fixtures, brackets, and hardware on the jobsite.
• Automotive & Heavy Equipment: Precise holes in frames, brackets, and fastener work.
• HVAC/Plumbing: Sheet metal and pipe penetrations where clean starts matter.
• Marine & Petrochemical: Handles tough, corrosion‑resistant alloys often used on board and in plants.
• Advanced DIY Workshops: Professional‑grade performance for home shops.

Professionals appreciate the controlled starting and steady chip flow of the 135° split point when drilling stainless and high‑strength alloys. Shops that track tooling by size and SKU can search and reorder quickly using the 3/16″ and Part 05660 listed throughout the page. If you routinely need larger diameters, this same Magnum design is available in the 130‑AG section.

Norseman 05660 Type 190-AG 3/16″ 135° Magnum Super Premium Split Point Jobber Drill Bit Features

• Twist Drills – HSS Heavy-Duty NAS 907B – Type 190-A
• Magnum Super Premium 135° Split Point.
• Jobber Length Drill Bit.
• Manufactured to NAS 907B Specification from Premium Hi-Molybdenum Steel.
• Magnum will substantially outperform cobalt drills in workhardening stainless steel and other tough drilling applications.
• Nitro-Carburized.
• Low temperature stress relief improveslubricity and toughness.
• Proudly Manufactured in the U.S.A
• America’s Finest High Speed Steel Cutting Tools

Norseman 05660 Type 190-AG 3/16″ 135° Magnum Super Premium Split Point Jobber Drill Bit Includes

• (1) NAS 907B HSS Jobber Length Drill Bit – 3/16″, Part 05660
• (12) Bits per Manufacturer Pack (optional): Add quantity in multiples of 12 if you want full unopened packs.

Norseman 05660 Type 190-AG 3/16″ 135° Magnum Super Premium Split Point Jobber Drill Bit Specifications

• Size (Diameter): 3/16″
• Part Number: 05660
• Diameter (Decimal): 0.1875
• Flute Length: 2-5/16″
• Overall Length: 3-1/2″
• Point: 135° Split Point (Magnum)
• Material: Premium Hi‑Molybdenum High Speed Steel (HSS)
• Finish/Treatment: Nitro‑Carburized; Low‑Temp Stress Relieved
• Standard: NAS 907B (Type 190‑A)
• Sold By: (1) Bit — order individually
• Qty. per/pack: (12) Manufacturer Pack (optional full‑pack ordering)
• Country of Origin: USA

Norseman 05660 Type 190-AG 3/16″ 135° Magnum Super Premium Split Point Jobber Drill Bit Warranty

• Manufacturer’s limited warranty against defects in materials and workmanship. Cutting tools are consumables; misuse or normal wear is not covered

Why Professionals Prefer the Irwin 3/16″ 135° Cobalt HSS Jobber Drill Bits

Users who need a 3/16″ HSS jobber length drill bit that can handle stainless and alloy steels choose the Norseman NAS 907B for its consistent start, long tool life, and U.S. manufacturing. The split point reduces walking and heat buildup, which helps prevent work hardening in difficult metals.

For larger sizes of this same Magnum design, see the Norseman 130‑AG listings. Search our site by 3/16″ or Part 05660 for quick reorders and exact matches.