Drillco 5/16 Spiral Flute 5/16 Shank Construction Reamer (427A120)
Drillco 427A120 5/16 Spiral Flute 5/16 Shank Construction Reamer is built for heavy-duty reaming applications, such as those found in the fabrication of structural steel assemblies. Its tapered point design allows for easy entry into holes that may be out of alignment, ensuring smooth and accurate reaming. Featuring a 3-flats reduced shank, this tool provides a secure grip and prevents slippage during operation. Manufactured from premium grade HSS and finished with a black oxide surface treatment, it offers excellent durability and extended tool life. The self-centering 135° split-point reduces walking and thrust requirements, while the shorter screw machine length increases rigidity to minimize breakage. Ideal for demanding construction environments, this reamer delivers consistent, reliable performance.
Tapered point for smooth entry into misaligned holes
Premium grade HSS for superior durability
Self-centering 135° split-point minimizes walking and thrust
Black oxide surface treatment enhances tool life
Short screw machine length adds rigidity and reduces breakage
3-flats reduced shank prevents slippage
Ensures precise reaming in challenging construction conditions
Durable construction for extended use
Improved control and alignment in structural steel applications
Reduced risk of tool failure under heavy loads
Technical Specifications:
Type: Spiral Flute Construction Reamer
Shank Size: 5/16"
Point Type: Tapered point, 135° split-point
Material: Premium grade HSS
Surface Treatment: Black oxide
Shank Style: 3-flats reduced shank
Applications: Fabrication of structural steel assemblies
Origin: Made in USA
Product identification
- Brand: Drillco
- Model / MPN: 427A120





