Help identifying old pinion grub screw size

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EMC
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Help identifying old pinion grub screw size

Post by EMC »

I have some old 48p pinion gears of unknown brand that take the smallest allen wrench I own.
I measured the following with digital calipers:

0.0495" allen wrench size at the flats (1.26mm)
Grub screw diameter: 0.110" (2.8mm)
Grub screw length 3.12mm

I can't figure out what sae or metric size these are to get some replacements as these grub screws strip easily.

Any ideas? They might be old robinson racing pinions.

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Re: Help identifying old pinion grub screw size

Post by RC10th »

It's a 4-40 grub screw, .050" allen.

I wouldn't think they would be too hard to find.

The DuBro wall at your LHS will likely have some.
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Re: Help identifying old pinion grub screw size

Post by Lonestar »

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Re: Help identifying old pinion grub screw size

Post by NomadRacer »

If you want to buy from a US seller on ebay, these guys are top notch. I buy a lot of hardware from them.

http://stores.ebay.com/MonsterBolts/4-40-/_i.html?_fsub=28023679018
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Re: Help identifying old pinion grub screw size

Post by EMC »

Excellent, thanks guys!

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Re: Help identifying old pinion grub screw size

Post by lmw94002 »

Don't forget about McMaster Carr ... lol... they can get just about any screw, any size, and multiple materials...

I literally bought stainless M3 and 4-40 hardware for my RC10s and B6s... 100 pcs/box for all the the sizes... it can add up a bit, but I can do like 10+ cars of each now. I should be stocked for the next 10+ years.
--
RC10CE 6-gear, RC10 Team, 10L, 10LSS, Worlds, B2, B4 TC, FT TC3, Nitro SC8, SC18, RC18LM, FT SC10.2, Worlds-ReRe, B6, B6D
--Builds--
SSC10 build - http://www.rc10talk.com/viewtopic.php?f=88&t=41740

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