Table XXXIII. Proportions For

Description

This section is from the book "Safe Building", by Louis De Coppet Berg. Also available from Amazon: Code Check: An Illustrated Guide to Building a Safe House.

Table XXXIII. Proportions For

SCREW THREADS,

NUTS,

and BOLT HEADS.

Diameter of

Screw.

Threads per Inch.

Diameter at root of

Width of Flat,

Short Diameter Rough.

Short Diameter

Long Diameter

Long Diameter

Thickness

Rough.

Thickness

Short Diameter Rough.

Short Diameter Finish.

Long

Diameter

Rough.

Long

Diameter Rough.

Thickness Rough.

Thickness Finish.

1/4 ..

20 .

,186

,0062.

1/2.

7/16..

37/64..

7/10..

1/4..

3/16..

1/2 .

7/16..

37/64..

7/10..

1/4..

3/16..

51/6..

18 .

,240

,0074.

19/32

17/32..

11/16..

10/12..

5/16..

1/4..

19/32..

17/32..

11/64..

10/12..

19/64..

1/4..

3/5..

16 .

,294

,0078.

11/16.

5/8..

51/54..

63/64..

3/8..

5/16..

11/16..

5/8..

51/64..

63/64..

11/32..

5/16..

7/16..

14 .

,344

,0089.

25/32.

23/32..

9/10..

1 7/64..

7/16..

3/8..

25/32..

23/32..

9/10..

1 7/64..

25/64..

3/8..

1/2..

13 .

,400

,0096.

7/8.

13/16..

1..

1 16/64..

1/2..

7/16..

7/8..

13/16..

1..

1 15/64.

7/16..

7/16..

9/16..

12 .

,454

,0104.

31/32.

29/32..

1 1/8..

1 23/64..

9/16..

1/2 ...

31/32..

29/32..

1 1/8..

1 23/64..

31/64.

1/2..

5/8..

11 .

,507

,0113.

1 1/16

1..

1 7/32..

1 1/2..

5/8..

9/16..

1 1/16..

1..

1 7/32..

1 1/2..

17/32..

9/16..

3/4..

10 .

,620

,0125.

1 1/4.

1 3/16..

1 7/16..

1 49/64..

11/4..

11/16..

1 1/4..

1 3/16..

1 7/32..

1 49/64..

5/8..

11/16..

7/8..

9 .

,731

,0138.

1 7/16.

1 6/8..

1 21/3..

2 1/32..

7/8..

15/16..

1 7/16..

1 3/8..

1 21/32.

2 1/32..

23/32..

15/16..

1..

8 .

,837

,0156.

1 5/8.

1 9/16..

1 7/8..

1 19/64..

1..

15/16..

1 5/8..

1 9/16..

1 7/8..

2 19/64..

13/16..

15/16..

1 1/8..

7 .

,940

,0178.

1 13/16..

1 3/4..

2 3/32 ..

2 9/16..

1 1/8..

1 1/16..

1 13/16..

1 3/4..

2 3/32..

2 9/16..

29/32..

1 1/16..

1 1/2..

7 .

1,065

,0178.

2 .

1 15/16..

2 5/16..

2 53/64..

1 1/4..

1 3/16..

2 ...

1 15/16..

2 5/16..

2 53/64..

1..

1 3/16..

1 3/5..

6 .

1,160

,0208.

2 3/16..

2 1/8 ..

2 17/32..

3 3/32.

1 3/8..

1 5/16..

2 3/16..

2 1/8..

2 17/32..

3 3/32..

1 3/32..

1 5/16..

1 1/2..

6 .

1,284

,0208.

2 3/8..

2 5/16..

2 3/4..

3 23/64..

1 1/2..

1 7/16..

2 3/8 ...

2 5/16..

2 3/4..

3 23/32..

1 3/16..

1 7/16..

1 5/8..

5 1/2.

1,389

,0227.

2 9/16..

2 1/2..

2 31/32..

3 5/8..

1 5/8..

1 9/16..

2 9/16..

2 1/2..

2 31/32..

3 5/8..

1 9/32..

1 9/16..

1 3/4..

5 .

1,491

,0250.

2 3/4 ...

2 11/16.

3 3/16..

3 57/64..

1 5/4..

1 11/16..

2 3/4..

2 11/16.

3 3/16..

3 57/64..

1 3/8..

1 11/16..

1 7/8..

5 .

1,016

,0250.

2 15/16..

2 7/8..

3 13/32..

4 5/32..

1 7/8..

1 13/16..

2 15/16..

2 7/8..

3 13/32..

4 5/32..

1 16/32..

1 13/12..

2..

4 1/2.

1,713

,0277.

3 1/8 ...

3 1/16..

3 5/8..

4 27/64..

2 ...

1 15/16..

3 1/8 ...

3 1/16..

3 5/8..

4 27/64.

1 9/16..

1 15/16..

2 1/4..

4 1/2 .

1,962

,0277.

3 1/3 ...

3 7/16..

4 1/16..

4 61/64...

2 1/4..

2 3/16..

3 1/2 ...

3 7/16..

4 1/16..

4 61/64.

1 3/4..

2 3/16..

2 1/2..

4 .

2,176

,0312.

3 7/8 ...

3 13/16..

4 1/2..

5 31/64..

2 1/2..

2 7/16..

3 7/8..

3 13/16..

4 1/2..

5 31/64.

1 15/16..

2 7/16..

2 3/4..

4 .

2,426

,0312.

4 1/4 ...

4 3/16..

4 29/32..

6..

2 3/4..

2 11/16.

4 1/4..

4 3/16..

4 29/32.

6 ..

2 1/8..

2 11/16..

3..

3 1/3 .

2,629

,0357.

4 5/8 ...

4 9/16..

5 3/8..

6 17/32..

3 ...

2 15/16..

4 5/8..

4 9/16..

5 3/8..

6 17/32..

2 5/16..

2 15/16..

3 1/4..

3 1/2 .

2,879

,0357.

5 ..

4 15/16..

5 13/16..

7 1/16..

3 1/4 .

3 3/16..

5..

4 15/16..

5 13/16..

7 1/16.

2 1/2..

3 3/16..

3 1/2..

3 1/4 .

3,100

,0384.

5 3/8 .

5 5/16..

6 7/64..

7 39/64..

3 1/2 .

3 7/16..

5 3/8..

5 5/16..

6 7/64..

7 39/64..

2 11/16..

3 7/16..

3 3/4..

3 .

3,317

,0413.

5 3/4.

5 11/16..

6 21/32..

8 1/8..

3 3/4..

3 13/16..

5 3/4..

5 11/16..

6 21/32..

8 1/8..

2 7/8..

3 13/16..

4..

3

3,567

,0413.

6 1/8 .

6 1/16..

7 3/32..

8 41/64..

4..

3 15/16..

6 1/8..

6 1/16..

7 3/32..

8 41/64..

3 1/16..

3 15/16..

4 1/4..

2 7/8 .

3,798

,0185.

6 1/2 .

6 7/16..

7 9/16.

9 3/16.

4 1/4..

4 3/16..

6 1/2..

6 7/16..

7 9/16..

9 3/16..

3 1/4..

4 3/16 ..

4 1/2..

2 8/4 .

4,028

,0454.

6 7/4.

6 13/16..

7 31/32..

9 3/4..

4 1/2..

4 7/16.

6 7/8..

6 13/16.

7 31/32..

9 3/4..

3 7/16..

4 7/16.

4 3/4..

2 5/8 .

4,256

,0476.

7 1/4 .

7 3/16.

8 13/32.

10 1/4.

4 3/4..

4 11/16.

7 1/4..

7 3/16..

8 13/32..

10 1/4..

3 5/8..

4 11/16..

5..

2 1/2 .

4,480

,0500.

7 5/8 .

7 9/16..

8 27/32..

10 49/64.

5 . .

4 15/16.

7 5/8..

7 9/16..

8 27/32..

10 49/64.

3 13/16..

4 15/16..

5 1/4..

2 1/2 .

4,730

,0500.

8 .

7 15/16..

9 9/32..

11 23/64.

5 1/4..

5 3/16..

8..

7 15/16.

9 9/32...

11 23/64.

4..

5 3/16..

5 1/2..

2 3/8 .

4,953

,0526.

8 3/4.

8 5/16..

9 23/32

11 7/8..

5 1/2 ...

5 7/16..

8 3/4..

8 15/16.

9 23/32..

11 7/8..

4 3/16.

5 7/16..

5 3/4..

2 3/8.

5,203

,0526.

8 3/4.

8 5/16.

10 5/32..

12 3/8..

5 3/4..

5 11/16.

8 3/4..

8 11/16.

10 5/32..

12 3/8..

4 3/8..

5 11/16..

6 ...

2 1/4 .

5,423

,0555.

9 1/8 .

9 1/16..

10 19/32.

12 15/16.

6 ...

5 15/16.

9 1/8..

9 1/16..

10 10/32..

12 15/16..

4 9/16..

5 15/16..

	Rough Nul=one and one-half diameter of bolt + 1/8.
	Finished Nut=one and one-half diameter of bolt +1/16.
	Rough Nut=diameter of bolt.
	Finished Nut=diameter of bolt-1/16.

	Rough Head=one and one-half diameter of bolt + 1/8.
	Finished Head-one and one-half diameter of bolt + 1/16.
	Rough head=one-half distance between parallel sides of head.
	Finished head=diameter of bolt-1/16.

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