MALE PRESS MOUNT KNURLED STUD
HEX OR ROUND
General Information:
Male press mounted knurled studs, also known as ground studs, can be a better alternative to the use of standard bolts. The low profile head can allow the studs to be mounted closer to the surface, resulting in a more efficent mounting process. It can be a completely flush mounted stud by either eliminating the collar or by counterboring the hole the stud is being mounted in providing the board/plate is thick enough to allow this.
Like all of our products, these studs can be modified to fit the needs of the individual customer. Modifications to thread length (B=.515), thread type (10-24 instead of 10-32), collar length (Collar = .075), and knurl length (C=.118) are possible modifications.
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Material Notes:
Need the strength of a grade 5 or 8 bolt but want it in a stud instead? Material codes STL4(4140) and STL5(4340) are ideal choices for these options as they can be hardened to the hardness required.
Note: These materials are only used as suggestions. Engineering tests should be used to determine if the product meets form and function desired.
Part Specs:
| Part Code |
Thread Size |
"B" Shank Length |
"D" Round or Hex |
"K" Knurl Dia. |
Recommended Drill Hole Size |
| MKS9150 | 2-56 | 3/16 | .250 | .152 | .145 |
| MKS9152 | 4-40 | 1/4 | .250 | .152 | .145 |
| MKS9154 | 6-32 | 3/8 | .312 | .201 | .194 |
| MKS9156 | 8-32 | 7/16 | .312 | .201 | .194 |
| MKS9158 | 10-32 | 1/2 | .375 | .247 | .240 |
| MKS9160 | 1/4-20 | 1/2 | .500 | .267 | .260 |
| MKS9162 | 1/4-20 | 5/8 | .625 | .299 | .290 |
| MKS9164 | 5/16-18 | 7/8 | .500 | .366 | .358 |
| MKS9166 | 3/8-16 | 1.00 | .562 | .426 | .417 |
| MKS9168 | 1/2-13 | 1.00 | .625 | .550 | .542 |
Dimensional Tolerances:
| Thread Length "B" |
Material Size "D" |
"K" Knurl Dia. |
"C" Length |
Hole Size |
| + - .005 | Commercial Tolerances | + - .003 | + -.005 | +.002/-.000 |
Recommended Drill Hole Tolerances:
For the best installation results, try to keep the hole the stud is going to be installed into as close to the hole size mentioned above. Generally speaking, keeping it to a +.002/-.000 is the ideal condition for these parts to install properly. I fthe hole size is too large, the stud will not hold properly with the possiblity of pushing out. If the hole is too small, the stud or the board/plate may break. To add better retention in a board/plate, these items could be welded or soldered providing that the items are properly prepared and that it will not affect any fuction of the assembly.
How to order examples:
You are looking for a 1/2-13 stud out of 7075 alum to fit in a 1/4" plate with no collar and no finish.
Order part# MKS9168-ALUM3-.250-NC-PLAIN
Looking for a 1/4-20 x 5/8 stud with a 3/16 shank out of 303 hex st. st that also needs to be passivated.
Order part# MKS9162-StSt1-.187-HC-PASS
Looking for a 10-32 stud with a .118 shank out of 303 round st. st that also needs to be black zinced.
Order part# MKS9158-StSt1-.125-RC-BLKZC mod C=.118