Clearance holes

Clearance holes

Steel (excluding SECC)

Stainless steel

Minimum through-hole diameter

Plate thickness	Other than for shims			For shims (SPCC)
Plate thickness	Limit d	Limit w₁	Limit w₂	Limit d	Limit w₁	Limit w₂

Hole making

Plate thickness	M3			M4			M5
Plate thickness	a	b	c	a	b	c	a	b	c

Plate thickness	Size	Square and slotted holes					Round holes					Tapped holes					Countersinks					Burring					Nut (press-fitted)					Nut (welded)
Plate thickness	Size	a	b	c	w	x	a	b	c	w	x	a	b	c	w	x	a	b	c	w	x	a	b	c	w	x	a	b	c	w	x

Minimum through-hole diameter

Plate thickness	SUS304(No.1) SUS304(2B) SUS316(2B) SUS430(2B)			SUS304 (#400 polished one side) SUS304 (hairline one side)			SUS304 (H) (for shims)
Plate thickness	Limit d	Limit w₁	Limit w₂	Limit d	Limit w₁	Limit w₂	Limit d	Limit w₁	Limit w₂

SUS304 SUS430

Plate thickness	M3			M4			M5
Plate thickness	a	b	c	a	b	c	a	b	c

Minimum through-hole diameter

Plate thickness	PET			Acrylic			Polycarbonate			PVC
Plate thickness	Limit d	Limit w₁	Limit w₂	Limit d	Limit w₁	Limit w₂	Limit d	Limit w₁	Limit w₂	Limit d	Limit w₁	Limit w₂

Choose a mode

Sheet metal design limits — Clearance holes | Updraft - Mechanical Engineering Calculators