Makita AT638A pneumatic 18 gauge 1/4 inch narrow crown stapler kit resting next to its protective teal hard tool case for woodworking.
Left side profile of the Makita AT638A air powered narrow crown stapler showcasing the durable aluminum body, ergonomic rubber grip, and bottom-loading magazine.
Diagram of the Makita AT638A pneumatic crown stapler highlighting key features including the built-in air duster, tool-less depth adjustment, and staple reload indicator window.
Makita AT638A 1/4 inch pneumatic narrow crown stapler featuring a graphic overlay indicating compatibility with 18 gauge crown staples.
Close-up of a hand gripping the Makita AT638A pneumatic stapler, highlighting the reversible belt hook and the 1/4 inch NPT air inlet fitting.
Detailed view of the easy-to-use "tool-less" depth adjustment dial on the Makita AT638A narrow crown stapler for precise flush and countersink fastening.
Extreme close-up of the 1/4 inch NPT air inlet on the Makita AT638A 18 gauge stapler, designed for easy connection to standard air hoses.
Close-up of a user pressing the built-in air duster button on the top of the Makita AT638A pneumatic stapler to clear sawdust from a woodworking surface.
Close-up of the red staple reload indicator window on the magazine of the Makita AT638A crown stapler, designed to prevent dry-fires.
A woodworker loading a strip of 18 gauge 1/4 inch narrow crown staples into the high-efficiency bottom-loading magazine of the Makita AT638A pneumatic stapler.
Extreme close-up of the narrow nose design and non-marring tip of the Makita AT638A pneumatic crown stapler, engineered for precise staple placement in tight areas.
Makita Celebrates 100 Years of Innovation promotional video
Makita AT638A pneumatic 18 gauge 1/4 inch narrow crown stapler kit resting next to its protective teal hard tool case for woodworking.
Left side profile of the Makita AT638A air powered narrow crown stapler showcasing the durable aluminum body, ergonomic rubber grip, and bottom-loading magazine.
Diagram of the Makita AT638A pneumatic crown stapler highlighting key features including the built-in air duster, tool-less depth adjustment, and staple reload indicator window.
Makita AT638A 1/4 inch pneumatic narrow crown stapler featuring a graphic overlay indicating compatibility with 18 gauge crown staples.
Close-up of a hand gripping the Makita AT638A pneumatic stapler, highlighting the reversible belt hook and the 1/4 inch NPT air inlet fitting.
Detailed view of the easy-to-use "tool-less" depth adjustment dial on the Makita AT638A narrow crown stapler for precise flush and countersink fastening.
Extreme close-up of the 1/4 inch NPT air inlet on the Makita AT638A 18 gauge stapler, designed for easy connection to standard air hoses.
Close-up of a user pressing the built-in air duster button on the top of the Makita AT638A pneumatic stapler to clear sawdust from a woodworking surface.
Close-up of the red staple reload indicator window on the magazine of the Makita AT638A crown stapler, designed to prevent dry-fires.
A woodworker loading a strip of 18 gauge 1/4 inch narrow crown staples into the high-efficiency bottom-loading magazine of the Makita AT638A pneumatic stapler.
Extreme close-up of the narrow nose design and non-marring tip of the Makita AT638A pneumatic crown stapler, engineered for precise staple placement in tight areas.
Makita Celebrates 100 Years of Innovation promotional video
Makita

Makita Pneumatic Crown Stapler AT638A 1/4 Inch Narrow 18 Gauge Air Tool (120 PSI 1.7 SCFM Cabinetry Woodworking Fencing Finish Carpentry Kit Case)

In stock
SKU: AT638A
$174.00 USD

Description

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Pneumatic Crown Precision for Fine Finish Carpentry and Cabinetry

The Makita AT638A 1/4 Inch Narrow Crown Stapler is a professional-grade pneumatic fastening tool designed to drive 18-gauge staples with leg lengths ranging from 1/2 inch to 1-1/2 inches. Operating within a compressed air pressure range of 70 to 120 PSI, this air-powered hand tool provides secure, consistent fastening while maintaining an ultra-lightweight profile of only 2.7 pounds. The integrated tool-less depth adjustment dial and selective actuation mode switch maximize job-site productivity during detailed woodworking, structural cabinet assembly, and trim installations.

Best Used For:

  • Cabinetry Construction: Assembling custom cabinets, installing case backs, and building drawers with robust, hidden fasteners.
  • Finish Carpentry trim: Attaching decorative trim, detailed lattice work, and soffits without fracturing thin wood profiles.
  • Material Sheathing: Fastening vapor barriers, insulation panels, and light wire fencing securely to structural dimensional framing.

Key Performance & Safety Features

  • Tool-Less Depth Control: Micro-fine adjustment dial enables prompt changes between completely flush seating and clean countersunk driving.
  • Integrated Air Duster: Employs existing compressor lines to direct a rapid blast of air across workpieces, instantly clearing sawdust.
  • Selective Actuation Trigger: 2-mode selector switch allows immediate toggling between precise single-sequential and rapid-contact bump-firing.
  • Dry-Fire Prevention: Visual staple reload indicator window monitors remaining fasteners to stop empty cycles and protect wood surfaces.
  • Ultra-Lightweight Housing: Slim aluminum frame minimizes arm strain during continuous vertical or overhead applications.

What's Included

  • (1) 18-Gauge 1/4" Narrow Crown Stapler (AT638A)
  • (1) Pneumatic Nailer Oil (181434-7)
  • (1) Safety Glasses
  • (2) No-Mar Tips
  • (1) Air Fitting
  • (1) Protective Tool Case

Technical Specifications

Power Type Pneumatic (Air Powered)
Fastening Category Narrow Crown Stapler
Staple Gauge 18 Gauge
Crown Size 1/4 Inch
Leg Length Range 1/2 Inch to 1-1/2 Inches
Maximum Magazine Capacity 100 Staples
Operating Air Pressure 70 - 120 PSI
Air Consumption 1.7 SCFM @ 90 PSI
Dimensions (LxWxH) 9 x 2-15/16 x 9-7/8 Inches
Net Weight 2.7 lbs.
Inlet Size 1/4 Inch NPT
Shipping Weight 6.92 lbs.
Pro-Tip: To avoid single-leg misfires when stapling thin lattice materials, maintain a perfectly flat tool profile against the workpiece to ensure both crown points penetrate the grain uniformly.