Hi all,
I have been working with @azaustin to make an OEM style factory manual top hold down latch.
In our haste we neglected to measure the holes in the spring steel the latch originally was riveted to.
(The top 2 holes)
The latch I'm making will be a bolt on (most of us do not have rivet presses and pop rivets look like... pop rivets) and I would rather size the screw to go through the OEM holes rather than require the user to re-drill the holes larger.
When I design a part I try to make it look and function OEM as much as possible. I also do not want to modify an OEM part if at all possible to make a replacement part fit. By making this screw on it can be easily changed in the future if need be and for those worried about the screws coming loose, a drop of removable Locktite will do the trick.
The screws on the left are 5-40 and are 0.125 OD shaft
The screws on the right are 4-40 and are 0.112 OD shaft
WHAT I NEED....
I need someone who has the spring metal that they know has not been re-drilled to use pin gauges or numbered drill bits to find the size or at least the Go/No Go sizes.
Thank you in advance.
Dana
Life Hack... Harbor Freight as well as other online sources have numbered drill bit sets
Typically in the sub $40.00 range, sometimes in the $10.00 range for the smaller kits on sale. Do not use them for drilling so they stay pristine and then use them as a super inexpensive pin gauge set. After you find the drill shank that closely matches the hole, measure the OD of the drill shank with a caliper and there you go. The benefit of this over a true pin gauge set is typically the holes will be numbered drill bit sizes anyway. Disclaimer... this is not accurate enough for engine building or aerospace.
I have been working with @azaustin to make an OEM style factory manual top hold down latch.
In our haste we neglected to measure the holes in the spring steel the latch originally was riveted to.
(The top 2 holes)
The latch I'm making will be a bolt on (most of us do not have rivet presses and pop rivets look like... pop rivets) and I would rather size the screw to go through the OEM holes rather than require the user to re-drill the holes larger.
When I design a part I try to make it look and function OEM as much as possible. I also do not want to modify an OEM part if at all possible to make a replacement part fit. By making this screw on it can be easily changed in the future if need be and for those worried about the screws coming loose, a drop of removable Locktite will do the trick.
The screws on the left are 5-40 and are 0.125 OD shaft
The screws on the right are 4-40 and are 0.112 OD shaft
WHAT I NEED....
I need someone who has the spring metal that they know has not been re-drilled to use pin gauges or numbered drill bits to find the size or at least the Go/No Go sizes.
Thank you in advance.
Dana
Life Hack... Harbor Freight as well as other online sources have numbered drill bit sets
Typically in the sub $40.00 range, sometimes in the $10.00 range for the smaller kits on sale. Do not use them for drilling so they stay pristine and then use them as a super inexpensive pin gauge set. After you find the drill shank that closely matches the hole, measure the OD of the drill shank with a caliper and there you go. The benefit of this over a true pin gauge set is typically the holes will be numbered drill bit sizes anyway. Disclaimer... this is not accurate enough for engine building or aerospace.
