Aerospace Precision Tooling

Countersinks for Metal | Counterbores | Countersink Cages

Precision HSS and carbide countersink cutters, micro-stop depth cages, rivet shavers, counterbores, and chatterless countersinks engineered for global airline MRO stations and aerospace assembly lines.

  • NAS & MIL SpecsPrecision form-relieved geometry
  • 82° • 100° • 120° • 130°Complete range of included angles
  • ±0.001" Depth ControlMicro-stop cages for non-marring finish
  • CAGE Code 0PFP1Approved global aerospace supplier
Engineering Excellence Since 1986

Industrial-Grade Aerospace Countersinking Solutions

Pan American Tool Corporation manufactures a complete line of high-speed steel (HSS) and tungsten carbide-tipped countersinks, micro-stop cages, counterbores, and rivet shavers. Engineered specifically for micro-stop countersinking units featuring a standard 1/4"-28 threaded shank drive, our tooling delivers flawless concentricity, smooth chatter-free cutting action, and precise depth control required for flush-rivet and Hi-Lok® fastener installations across aircraft skins and structural frames.

Precision Form-Relieved Design

Manufactured from premium M2/M42 High-Speed Steel and solid tungsten carbide tips. Precision-ground tool flutes maintain precise included angles (82°, 100°, 120°, 130°) while preventing built-up edges on aerospace aluminum alloys (2024, 7075) and titanium.

Micrometer Depth Repeatability

Pair our stop countersinks with micro-stop depth cages available in 7/16", 1/2", 5/8", 1-1/4", and 1-3/8" capacities. Nylon footpieces and needle-bearing options prevent surface marring and heat transfers on critical aerostructures.

Global B2B Supply & MRO Support

In stock and ready for immediate global dispatch from our Fort Lauderdale hub. Fully compliant with military standard maintenance procedures and OEM assembly specs for commercial carriers, defense depots, and Tier-1 aerostructure plants.

Product Catalog

Comprehensive Aerospace Countersinks & Tooling Line

Browse our extensive selection of HSS stop countersinks, micro-stop cages, counterbores, chatterless cutters, rivet shavers, and pilot accessories. Click "Inquire Now" on any category to request bulk quotes or custom specs.

High Speed Steel Stop Countersinks 82 degree included angle

High Speed Steel Stop Countersinks 82°

Standard 1/4"-28 Threaded Shank
High Speed Steel Stop Countersinks 100 degree included angle

High Speed Steel Stop Countersinks 100°

Standard Aircraft Flush Rivet Spec
High Speed Steel Stop Countersinks 120 degree included angle

High Speed Steel Stop Countersinks 120°

Thin Sheet Aircraft Skin Cutting
High Speed Steel Stop Countersinks 130 degree included angle

High Speed Steel Stop Countersinks 130°

Specialized Aerostructure Geometry
Solid Carbide Stop Countersinks 100 degree included angle

Solid Carbide Stop Countersinks 100°

For High-Volume & Hard Alloys
Carbide Tipped Stop Countersinks with Integral Pilot

Carbide Tipped Stop Countersinks (Integral Pilot)

High Precision Concentric Design
Carbide Tipped Stop Countersinks with Replaceable Pilots

Carbide Tipped Stop Countersinks (Replaceable Pilots)

Modular Pilot Replacement
Pilots For Carbide Tipped Stop Countersinks

Pilots For Carbide Tipped Stop Countersinks

Precision Ground Steel Pilots
Threaded Shank Chatterless Countersinks

Threaded Shank Chatterless Countersinks

Smooth Finish Without Chatter Marks
High Speed Steel 6 Flute Chatterless Countersinks

High Speed Steel 6-Flute Chatterless Countersinks

Multi-Flute Heavy Duty Deburring
Carbide 6 Flute Chatterless Countersinks

Carbide 6-Flute Chatterless Countersinks

Extreme Life in Hard & Abrasive Metals
High Speed Steel Hollow Cutters

High Speed Steel Hollow Cutters

Spot-Facing & Core Drilling
Rivet Shavers for Aircraft Flush Fasteners

Aircraft Rivet Shavers

Flush Rivet Head Trimming
Pilot Bonding Brushes for Surface Contact

Pilot Bonding Brushes

Electrical Grounding Surface Cleaning
HSS Counterbores 1/4 Shank .032 Radius

HSS Counterbores (1/4" Shank, .032 Radius)

Standard Aircraft Corner Radius
High Speed Steel Counterbores No Radius

HSS Counterbores (No Radius)

Flat Bottom Spot-Facing
Precision Counterbore Pilots

Precision Counterbore Pilots

Interchangeable Guide Shank
Reverse Spotfacers Counterbore Tool

Reverse Spotfacers / Counterbores

Back Spot-Facing in Restricted Access
5/8 Capacity Micro-Stop Countersink Cage

5/8" Capacity Micro-Stop Countersink Cage

0.001" Incremental Micrometer Stop
Heavy Duty Bearing Countersink Cage with Nylon Footpiece

Heavy Duty Bearing Cage w/ Nylon Foot

Non-Marring Surface Protection
Aircraft Skin Paint Cutters

Aircraft Skin Paint Cutters & Arbors

Clean Surface Preparation Around Holes
Nova Complete Motor Mounted Micro-Stop Cage

Nova® Motor Mounted Micro-Stop Cage

Integrated Pneumatic Motor Assembly
Engineering Selection Matrix

Technical Guide: Matching Cutters & Cages to Material

Use this reference table to specify cutter substrate, included angle, and cage configurations for common airframe materials and fastener types. Guidelines comply with standard aerospace manufacturing practices.

Technical specification guide for countersinking and counterboring in aerospace materials.
Aerospace Material Cutter Material Included Angle Recommended Cage Type Engineering Best Practices
2024 / 7075 Aluminum Skins M2 / M42 High Speed Steel 100° or 82° Standard 5/8" Cage with Nylon Foot Maintain high spindle RPM with light feed pressure; clear chips continuously to prevent surface scoring.
Titanium (Ti-6Al-4V) Alloys Solid Carbide or Carbide-Tipped 100° or 120° Heavy Duty Needle-Bearing Cage Low RPM, constant positive feed pressure with flood coolant. Avoid dwelling to prevent work hardening.
Carbon Fiber Composite (CFRP) Carbide-Tipped (Integral Pilot) 100° or 130° Dust Extraction Micro-Stop Cage Use diamond-coated or carbide cutters. Vacuum abrasive dust immediately to avoid pilot and hole wear.
CFRP / Aluminum Stacks Carbide-Tipped (Replaceable Pilot) 100° Needle-Bearing Non-Marring Cage Pilots must be polished. Replace pilot pins at first sign of fretting to ensure tight hole concentricity.
Hi-Lok® & Flush Rivet Preparation HSS / Carbide Stop Countersink 100° (Standard) 0.001" Micrometer Adjustable Cage Always calibrate stop depth on scrap coupon of identical thickness prior to production countersinking.
Frequently Asked Questions

Aerospace Countersinking & Tooling Technical FAQ

What angles are standard for aerospace flush fastener countersinking?
The industry standard angle for commercial and military aircraft flush rivets (such as MS20426 series) and Hi-Lok® fasteners is 100°. Angles of 82° are used for standard industrial threaded fasteners, while 120° and 130° angles are specified for thin-skin aluminum and composite laminates to minimize edge breakout and maintain structural integrity.
How does a micro-stop countersink cage guarantee precise flush depth?
A micro-stop cage threads directly onto standard pneumatic drill motors or right-angle drives. It encases the countersink cutter and features a micrometer locknut. When the non-rotating footpiece contacts the aircraft skin, it prevents further axial travel of the cutter, holding depth tolerance within ±0.001 inches (0.025 mm).
When should I select carbide-tipped countersinks over high-speed steel (HSS)?
HSS countersinks are economical and effective for standard aluminum structural alloys. Carbide-tipped or solid carbide countersinks are recommended when machining abrasive composite panels (CFRP/GFRP), titanium, stainless steel, or when running high-volume automated production lines where tool longevity is critical.
What is the advantage of a chatterless countersink cutter?
Chatterless countersinks feature uneven flute spacing or multi-flute geometry (such as 6-flute configurations) designed to disrupt harmonic vibrations during cutting. This eliminates chatter marks, producing a mirror-smooth conical seat for flush-head fasteners without needing post-process deburring.
Can Pan American Tool supply custom pilot diameters and special angles?
Yes. In addition to our stock inventory of over 5,000 line items, Pan American Tool manufactures specialized pilot sizes, custom body diameters, and non-standard included angles to match your specific engineering drawings and OEM specs. Contact our technical engineering team for custom ordering.

Need Technical Support or a Wholesale Quote?

Connect directly with our aerospace tooling specialists in Fort Lauderdale, Florida. We assist airlines, MRO procurement managers, and OEM distributors worldwide with rapid delivery and technical compliance.

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