Taylormade Posted October 30, 2018 Share Posted October 30, 2018 I’m looking for some #12-28 bolts - either hex head or slotted screw head. My local auto shop has them up to 2 inches.. Naturally, I need 2-1/2” length. I’ve tried Grainger, Amazon and other usual suspects with no luck. I guess this is an odd size. There is a plethora of #10 and 1/4” bolts in all lengths, but the meager supply of #12 resides in a small specialty box with maximum length of 2 inches. Since I only need two, I don’t think having a batch of ten thousand made up in China works for me. Any suggestions? Link to comment Share on other sites More sharing options...
keiser31 Posted October 30, 2018 Share Posted October 30, 2018 Are they for your DB? If so, for what attachment? Link to comment Share on other sites More sharing options...
Taylormade Posted October 30, 2018 Author Share Posted October 30, 2018 The rearmost wooden floorboard. The four bolts along the back are just an inch long, so that was no problem. The two front bolts pass through the floorboard and a wood block spacer before they thread into a tab on the frame. Sometimes you just have to wonder, something this minor ends up holding things up for days. Link to comment Share on other sites More sharing options...
keiser31 Posted October 30, 2018 Share Posted October 30, 2018 4 minutes ago, Taylormade said: The rearmost wooden floorboard. The four bolts along the back are just an inch long, so that was no problem. The two front bolts pass through the floorboard and a wood block spacer before they thread into a tab on the frame. Sometimes you just have to wonder, something this minor ends up holding things up for days. Interesting....my '31 has no wooden blocks under the floor. the '32s are SO different. Link to comment Share on other sites More sharing options...
Spinneyhill Posted October 30, 2018 Share Posted October 30, 2018 Are you sure it is 12-28x2.5? There are no other 12-28 screws in the Standard Parts section in the Master Parts List. There are 12-24x2.25 round head screws though. Link to comment Share on other sites More sharing options...
Taylormade Posted October 30, 2018 Author Share Posted October 30, 2018 2.25 would work, but I figured they would be impossible to find. The two inch were just short - just. I may just retap the holes for a 1/4 inch bolt that is easy to find. Link to comment Share on other sites More sharing options...
Spinneyhill Posted October 31, 2018 Share Posted October 31, 2018 1 hour ago, Taylormade said: but I figured they would be impossible to find. How about these, Sir. 16c each. https://www.boltdepot.com/Machine_screws_Slotted_round_head_Zinc_plated_steel_12-24.aspx Link to comment Share on other sites More sharing options...
Taylormade Posted October 31, 2018 Author Share Posted October 31, 2018 (edited) Those are coarse threads #12-24. I need fine thread, #12-28. Thanks for trying! Edited October 31, 2018 by Taylormade (see edit history) Link to comment Share on other sites More sharing options...
Frank DuVal Posted October 31, 2018 Share Posted October 31, 2018 12-24 is the common automotive screw size, like on Delco Generator terminals. Never seen a 12-28. Weird hardware not found at the local hardware store, try: McMaster Carr, MSC ( Long time ago was Manhattan Supply Company), Bolt Depot, Fastenall. I see Spiney Hill linked Bolt Depot. And, I see McMaster-Carr has 12-28 screws, but only in stainless steel button head 1" and smaller, $5 each! No wonder I have never seen them! Link to comment Share on other sites More sharing options...
Bloo Posted October 31, 2018 Share Posted October 31, 2018 Weld the 12-28 ends on 12-24 bolts? They would be ugly, but it would be inside a wooden block..... Other than having someone turn down and thread two slightly larger bolts, I am out of ideas. 1 Link to comment Share on other sites More sharing options...
Friartuck Posted October 31, 2018 Share Posted October 31, 2018 Make your own starting with hex stock and turning down on a lathe. Run through a die: https://www.travers.com/right-hand-high-speed-steel-adjustable-split-threading-dies/p/57751/?keyword=12-28 die&category=1|Metal Cutting Tools%3a High Speed Steel %26 Solid Carbide&lite=true&pricelistname=SITE Link to comment Share on other sites More sharing options...
JACK M Posted October 31, 2018 Share Posted October 31, 2018 It wouldn't be to hard to retap the hole to a quarter inch. I have run into the #12 problems before on the old Mopars. Link to comment Share on other sites More sharing options...
Frank DuVal Posted October 31, 2018 Share Posted October 31, 2018 Why not just run 12-24 tap in holes? Link to comment Share on other sites More sharing options...
Taylormade Posted October 31, 2018 Author Share Posted October 31, 2018 (edited) Retapping to 1/4 inch is the obvious answer. There is plenty of meat on the plate, so it should be an easy process. I like to keep things as original as possible, but since most of it is hidden inside the wood block, I'm not going to have a coronary over it. Thanks for all the advice. And I tried all the outlets suggested above with no luck. It's the length that is the problem. Edited November 1, 2018 by Taylormade (see edit history) 1 Link to comment Share on other sites More sharing options...
Spinneyhill Posted October 31, 2018 Share Posted October 31, 2018 1/4" is only 1/32" bigger, so should be a pretty easy fix. 1 Link to comment Share on other sites More sharing options...
Bhigdog Posted October 31, 2018 Share Posted October 31, 2018 2 hours ago, Taylormade said: Retapping to 1/4 inch is the obvious answer. There is plenty of meat on the plate, so it should be an easy process. I like to keep things as original as possible, but since most of it is hidden inside the wood bloke, I'm not going to have a coronary over it. Thanks for all the advice. And I tried all the outlets suggested above with no luck. It's the length that is the problem. A no brainer....................Bob Link to comment Share on other sites More sharing options...
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