American Model Engineering Supply
Scale Model Fasteners
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Terms and Conditions

 
We manufacture and stock a complete line of model hex cap screws, washers and nuts in brass and steel from 0-80 x 1/8" to 10-32 x 2".  We also supply the same screws and nuts in stainless steel from 2-56 x 1/8 to 10-32 x 1".  The form of these bolts and nuts is based on the American Standard and Unified Standard Heavy Hex standards.  This was the standard used by most of the machinery makers at the end of the 19th and early 20th century. Edit

MODEL HEX CAP SCREW MEASUREMENTS

 

All of our model hex cap screws are made to the following dimensions regardless of material with the exception of 4-40 screws in stainless which are of 3/16 hex material.  The hex size is the dimension across the flats of the hex material.  All bolt sizes #3 and up include a washer face on the head or nut to protect painted surfaces when tightened. 

 

Thread size

Hex used

Height of head

Height of nut

Height of washer land

0-80

3/32

.040

.048

0

1-72

7/64

.055

.063

0

2-56

1/8

.064

.075

0

3-48

5/32

.075

.087

.003

4-40

11/64

.084

.098

.004

5-40

3/16

.093

.108

.005

6-32

7/32

.104

.125

.006

8-32

.125

.140

.006

10-32

9/32

.140

.165

.007

Model Hex Cap Screws

Scale Model Nuts and Washers

Rivets