Fastener holes
Hole Size and Fastener Charts
Clearance, counterbore, and countersink hole size charts for common fastener standards.
Resources
28 references
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Clearance Hole Size Chart for Bolts and Screws (Imperial)
Imperial clearance holes reference for fastener hole sizing.
Clearance Hole Size Chart for Bolts and Screws (Metric)
Metric clearance holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Cheese Head Fasteners (DIN)
DIN counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Cheese Head Fasteners (GB)
GB counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Cheese Head Fasteners (ISO)
ISO counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Cheese Head Fasteners (JIS)
JIS counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Low Socket Head Screws (DIN 7984)
DIN 7984 counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Pan Head Screws (ANSI Inch)
ANSI Inch counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Pan Head Screws (ANSI Metric)
ANSI Metric counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Pan Head Screws (DIN 85)
DIN 85 counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Pan Head Screws (ISO 7045)
ISO 7045 counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Pan Head Screws (JIS)
JIS counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Pan Head Screws (UNI)
UNI counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Shoulder Screws (ANSI Inch)
ANSI Inch counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Shoulder Screws (DIN)
DIN counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Shoulder Screws (GB)
GB counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Shoulder Screws (ISO)
ISO counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Shoulder Screws (JIS)
JIS counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Socket Head Screws (ANSI Inch)
ANSI Inch counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Socket Head Screws (ANSI Metric)
ANSI Metric counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Socket Head Screws (DIN 912)
DIN 912 counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Socket Head Screws (GB)
GB counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Socket Head Screws (ISO 4762)
ISO 4762 counterbore holes reference for fastener hole sizing.
Counterbore Hole Size Chart for Socket Head Screws (JIS)
JIS counterbore holes reference for fastener hole sizing.
Countersunk Hole Size Chart for Socket Flat Head Machine Screws (ANSI Metric)
ANSI Metric countersunk holes reference for fastener hole sizing.
Countersunk Hole Size Chart for Socket Flat Head Screws (ANSI Inch)
ANSI Inch countersunk holes reference for fastener hole sizing.
Countersunk Hole Size Chart for Socket Flat Head Screws (ANSI Metric)
ANSI Metric countersunk holes reference for fastener hole sizing.
Countersunk Hole Size Chart for Socket Flat Head Screws (ISO)
ISO countersunk holes reference for fastener hole sizing.
About this category
Using Hole Sizes
Clearance, counterbore, and countersink hole size charts for common fastener standards. These references are intended for quick checks, education, drafting, design review, and early engineering work. Always verify final values against applicable standards, supplier data, and project requirements.