Name: Machine Screw Nuts
Descriptions: Machine Screw Nuts are available in steel with a zinc, black oxide, black zinc, or yellow zinc finish; as well as in 18-8 stainless steel in a plain or black oxide finish; and in 316 stainless steel. Designed for use with machine screws, machine screw nuts are also available in small pattern and square styles. They are thinner than finished hex nuts.
Material: stell and stainless steel 18-8 and A4
SQUARE AND HEX MACHINE SCREW NUTS ANSI/ASME B18.6.3 | ||||||||||
Nominal Size or Basic | F | G | G1 | H | ||||||
Width Across Flats | Width Across Corners | Thickness | ||||||||
Square | Hex | |||||||||
Basic | Max | Min | Max | Min | Max | Min | Max | Min | ||
0 | 0.0600 | 5/32 | 0.156 | 0.150 | 0.221 | 0.206 | 0.180 | 0.171 | 0.050 | 0.043 |
1 | 0.0730 | 5/32 | 0.156 | 0.150 | 0.221 | 0.206 | 0.180 | 0.171 | 0.050 | 0.043 |
2 | 0.0860 | 3/16 | 0.188 | 0.180 | 0.265 | 0.247 | 0.217 | 0.205 | 0.066 | 0.057 |
3 | 0.0990 | 3/16 | 0.188 | 0.180 | 0.265 | 0.247 | 0.217 | 0.205 | 0.066 | 0.057 |
4 | 0.1120 | 1/4 | 0.250 | 0.241 | 0.354 | 0.331 | 0.289 | 0.275 | 0.098 | 0.087 |
5 | 0.1250 | 5/16 | 0.312 | 0.302 | 0.442 | 0.415 | 0.361 | 0.344 | 0.114 | 0.102 |
6 | 0.1380 | 5/16 | 0.312 | 0.302 | 0.442 | 0.415 | 0.361 | 0.344 | 0.114 | 0.102 |
8 | 0.1640 | 11/32 | 0.344 | 0.332 | 0.486 | 0.456 | 0.397 | 0.378 | 0.130 | 0.117 |
10 | 0.1900 | 3/8 | 0.375 | 0.362 | 0.530 | 0.497 | 0.433 | 0.413 | 0.130 | 0.117 |
12 | 0.2160 | 7/16 | 0.438 | 0.423 | 0.619 | 0.581 | 0.505 | 0.482 | 0.161 | 0.148 |
1/4 | 0.2500 | 7/16 | 0.438 | 0.423 | 0.619 | 0.581 | 0.505 | 0.482 | 0.193 | 0.178 |
5/16 | 0.3125 | 9/16 | 0.562 | 0.545 | 0.795 | 0.748 | 0.650 | 0.621 | 0.225 | 0.208 |
3/8 | 0.3750 | 5/8 | 0.625 | 0.607 | 0.884 | 0.833 | 0.722 | 0.692 | 0.257 | 0.239 |
Description | Hex Machine Screw Nut: A six-sided internally threaded fastener with flat tops and chamfered corners. Threads shall be Unified Standard, Class 2B. Square Machine Screw Nut: A four-sided, internally threaded fastener, tops and bottoms flat, without chamfer. Threads shall be Unified coarse thread, Class 2B. |
Applications/ Advantages | Hex Machine Screw Nut: Designed to be used specifically with machine screws. Stainless nuts are used with stainless machine screws where parts are subject to corrosive conditions. Square Machine Screw Nut: Offers a greater bearing surface for wrenching. |
Material | Steel: Any low carbon steel Stainless: 18-8 stainless steel |
