M36 bolt or screw dimensions and sizes are massive industrial fasteners used in heavy-duty bridge girders, power plant turbines, offshore oil rigs, and large-scale hydraulic press assemblies. This size has a 36.00mm nominal major diameter and is available in M36 x 4.0 for the coarse series, where 4.0 represent the thread pitch in millimeters. This reference chart follows respective DIN and ISO standards for each head style and DIN 13-1 (coarse), DIN 13-21 (fine), and ISO 68-1 standards for thread dimensions to ensure global compatibility.
Disclaimer: Actual dimensions and tolerances may vary slightly depending on head style (e.g., Hex Head, Heavy Hex, Anchor Bolts), manufacturer, or material grade — always verify with the official product datasheet before use.
M36 x 4.0 Screw & Bolt – DIN 13-1/ISO 68-1
Dimension
Size (mm)
Min
Max
Major Diameter
35.465
35.94
Pitch Diameter
33.118
33.342
Minor Diameter
30.654
31.61
Thread Pitch
4.0
Major Diameter
35.465
35.94
Pitch Diameter
33.202
33.342
Minor Diameter
30.738
31.61
Thread Pitch
4.0
M36 x 3.0 Screw & Bolt – DIN 13-21/ISO 68-1
Dimension
Size (mm)
Min
Max
Major Diameter
35.577
35.952
Pitch Diameter
33.803
34.003
Minor Diameter
31.955
32.704
Thread Pitch
3.0
Major Diameter
35.577
35.952
Pitch Diameter
33.878
34.003
Minor Diameter
32.03
32.704
Thread Pitch
3.0
M36 x 2.0 Screw & Bolt – DIN 13-21/ISO 68-1
Dimension
Size (mm)
Min
Max
Major Diameter
35.682
35.962
Pitch Diameter
34.493
34.663
Minor Diameter
33.261
33.797
Thread Pitch
2.0
Major Diameter
35.682
35.962
Pitch Diameter
34.557
34.663
Minor Diameter
33.325
33.797
Thread Pitch
2.0
M36 x 1.5 Screw & Bolt – DIN 13-21/ISO 68-1
Dimension
Size (mm)
Min
Max
Major Diameter
35.732
35.968
Pitch Diameter
34.844
34.994
Minor Diameter
33.92
34.344
Thread Pitch
1.5
Major Diameter
35.732
35.968
Pitch Diameter
34.899
34.994
Minor Diameter
33.975
34.344
Thread Pitch
1.5
Major Diameter –
The largest diameter of the external thread, measured crest to crest.
This defines the nominal size (e.g., M12 which is 12 mm of nominal major diameter).
Pitch Diameter –
The diameter of an imaginary cylinder where the thread thickness equals
the space between threads. This is the critical dimension for thread fit
(Tolerance classes 2A/3A for Imperial; 6g/4g6g for Metric).
Minor Diameter –
The smallest diameter of the external thread, measured root to root.
This represents the core strength of the fastener and is the theoretical
maximum diameter of the tap drill.
Thread Pitch –
The distance from a point on one thread to the corresponding point on the next.
What is the tap drill size for M36 screws or bolts?
For metric fasteners, the recommended tap drill size can be calculated using this formula: Major Diameter – Thread Pitch. For an M36 x 4.0 (Coarse), the recommended tap drill is 32.00mm.
What clearance hole size is needed for an M36 screw or bolt?
For an M36 fastener, a 37.00mm drill bit is utilized for a Close Fit, a 39.00mm bit is used for a Normal Fit, and a 42.00mm bit is recommended for a Loose Fit. A Normal Fit is the industry standard to ensure the massive bolt shank passes through the assembly without binding while maintaining structural alignment.
What is the difference between a bolt and a screw?
The difference is based on the intent of the fastener’s use; If the primary intent is for the fastener to pass through an unthreaded hole and be assembled with a nut, it is a Bolt. In this application, you usually hold the head and turn the nut to apply tension. But if the primary intent is for the fastener to be installed into a threaded (tapped) hole, it is a Screw. In this application, the connection is tightened by turning the head of the fastener itself.
