SQUARE HOLES
What size hole do you need?

---

1/8" Square
Not to scale	.125" (3.175 mm) 5/32" centers (3.969 mm) 64% open		22, 24 ga. Steel 20 B&S ga. Aluminum

---

1/8" Square
Not to scale	.125" (3.175 mm) 3/16" centers (4.763 mm) 45% open		22 ga. Steel

---

2/10" Square Straight
Not to scale	.200" (5.080 mm) 1/4" centers (6.350 mm) 64% open		20, 22 ga. Steel 20 B&S ga. Aluminum 22 ga. Stainless

---

5/16" Square
Not to scale	.313" (7.938 mm) 11/32" centers (8.731 mm) 83% open		22 ga. Steel

 

---

5/16" Square
Not to scale	.313" (7.938 mm) 7/16" centers (11.113 mm) 51% open		22 ga. Steel

 

---

3/8" Square
Not to scale	.375" (9.525 mm) 1/2" centers (12.700 mm) 56% open		16 ga. Steel

 

---

29/64" Square
Not to scale	.453" (11.509 mm) 1/2" centers (12.700 mm) 81% open		22 ga. Steel

 

---

1/2" Square
Not to scale	.500" (12.700 mm) 11/16" centers (17.463 mm) 53% open		16, 20 ga. Steel

 

---

3/4" Square
Not to scale	.750" (19.050 mm) 1" centers (25.400 mm) 56% open		12, 16 ga. Steel

 

---

© Harrington & King Perforating Company, Inc. 2003