| Manufacturer | Description | Size | Image |
| 5310-00-639-1089 | Sq. M/S Nut Type 1
Style 3 steel nut with no coating |
1/4 -20 square | 
|
| K&K Fasteners Crestwood IL 60445 5310-00-880-7744 |
Nut, Plain Hex Nominal Size: 5/16 Thread 18 P/N None zinc-coated steel $2.31/box |
5/16 -18 hex | 
|
| unknown | coated hex nut, bright finish | 5/16 -18 hex | 
|
| unknown | coated hex nut, dull finish | 5/16 -18 hex | 
|
| unknown | steel hex nut with no coating | 5/16 -18 hex | 
|
| unknown | stainless steel heavy-hex nut stamped with a circle-S above "8FB" |
5/16 -18 heavy hex | 
|
| unknown | brass hex nut | 3/8 -16 hex | 
|
| unknown | grade 8 steel hex nut with no coating | 3/4 -10 hex | 
|
| unknown | steel hex nut with coating | 3/4 -10 square | 
|
| unknown | steel hex nut with coating | 3/4 -10 square | 
|