Source for NAS or MS landing gear bolts

Ask Questions and Offer Advice Related to the Cessna 120 & 140 Type

Moderators: 6183, 6643, V529

Forum rules
You must be a member of the Cessna 120-140 Association in order to post new topics, reply to existing topics, or search for information on this forum. Use the "Join" link in the red menu bar.
7313
Posts: 34
Joined: Sat Dec 22, 2018 1:35 pm
Name: John P
Aircraft Type:
Occupation:
Contact:

Source for NAS or MS landing gear bolts

Post by 7313 » Sun Aug 02, 2020 7:48 am

With the combination of shims and wheel pant plates on my airplane I need a couple of longer bolts, either NAS144-43 or MS20004-35. Does anyone know of a source? The usual suspects don't seem to carry either.

User avatar
6643
Posts: 1293
Joined: Tue May 01, 2018 7:00 am
Location: KLCI
Name: John C
Aircraft Type: 1946 C140/C90
Occupation: A&P, semi-retired
Contact:

Re: Source for NAS or MS landing gear bolts

Post by 6643 » Sun Aug 02, 2020 8:11 am

Are you sure you're measuring these correctly? That's 5/16" longer than the longest one I have. I can't imagine what you could have in there that accounts for 5/16"!

Are you taking into consideration that the length of the MS20004 is grip length, not overall length?

7313
Posts: 34
Joined: Sat Dec 22, 2018 1:35 pm
Name: John P
Aircraft Type:
Occupation:
Contact:

Re: Source for NAS or MS landing gear bolts

Post by 7313 » Sun Aug 02, 2020 8:35 am

The project came with 8 NAS144-41 bolts. They all work OK except for two of the holes in the right gear that have two shims and the wheel pant plate. Those end up slightly too short. Might be able to get away with -42’s, but want to be on the safe side and extra length doesn't seem to Present a problem.

I found a cross reference chart that says the MS equivalent of an NAS144-43 is a MS20004-35.

phil123
Posts: 8
Joined: Wed May 06, 2020 9:09 pm
Name:
Aircraft Type:
Occupation:
Contact:

Re: Source for NAS or MS landing gear bolts

Post by phil123 » Sun Aug 02, 2020 11:37 am

I got 8 new MS20004-32 bolts from Dodson International for the new grove axle installation, it will be a wild card for the -35's but might be worth a try (785) 878-8000

8359
Posts: 195
Joined: Tue Nov 27, 2018 10:53 pm
Location: KSNA
Name: Tamer A
Aircraft Type: 1946 C120 O-290-D
Occupation: Engineer
Contact:

Re: Source for NAS or MS landing gear bolts

Post by 8359 » Sun Aug 02, 2020 4:14 pm

This place has just about everything, but they are $$

https://military-fasteners.com/

User avatar
6643
Posts: 1293
Joined: Tue May 01, 2018 7:00 am
Location: KLCI
Name: John C
Aircraft Type: 1946 C140/C90
Occupation: A&P, semi-retired
Contact:

Re: Source for NAS or MS landing gear bolts

Post by 6643 » Mon Aug 03, 2020 10:19 am

I have 2 shims in mine, Cleveland brakes and no wheel pants. MS20004-30 was too long. Just saying... You have the bolt heads up against the inboard side of the gear leg, with no washer, right?

I've sold literally hundreds of these bolts and -28 works for Cleveland and -30 for Goodyear. Maybe one number higher if you have wheel pants.

7313
Posts: 34
Joined: Sat Dec 22, 2018 1:35 pm
Name: John P
Aircraft Type:
Occupation:
Contact:

Re: Source for NAS or MS landing gear bolts

Post by 7313 » Mon Aug 03, 2020 4:10 pm

OK, thanks John. I will check again. Maybe the chart I was using is wrong.

User avatar
6643
Posts: 1293
Joined: Tue May 01, 2018 7:00 am
Location: KLCI
Name: John C
Aircraft Type: 1946 C140/C90
Occupation: A&P, semi-retired
Contact:

Re: Source for NAS or MS landing gear bolts

Post by 6643 » Mon Aug 03, 2020 4:19 pm

Pull one out and measure it.

7313
Posts: 34
Joined: Sat Dec 22, 2018 1:35 pm
Name: John P
Aircraft Type:
Occupation:
Contact:

Re: Source for NAS or MS landing gear bolts

Post by 7313 » Tue Aug 04, 2020 10:43 am

John, you got me on the right track, and helped me find my error. I was including the head depth in my measurements. Lesson learned.

To summarize: I have old style original brakes, wheel pant plates, and two shims in one of the wheels. The other thing that helped to confuse me (not hard to do) is that even though this airplane is a very early serial number, the brake housings were apparently swapped out at some point with a later version that was used on serial numbers 9175 - 13399.

Now, measured correctly, it appears the four bolts I have are all NAS144-38's. Only two of them are too short, so what I really need is a -39 and a -40. That even matches up with the chart in the IPC!

That translates to MS20004-31 and 32.

I will double check all this tomorrow when I return to the hangar after the tail end of the hurricane passes us by.

Thanks for taking the time to straighten me out!

John

7313
Posts: 34
Joined: Sat Dec 22, 2018 1:35 pm
Name: John P
Aircraft Type:
Occupation:
Contact:

Re: Source for NAS or MS landing gear bolts

Post by 7313 » Wed Aug 05, 2020 9:05 am

Confirmed by measurement. Looking for NAS144-39 and -40, or MS20004-31 and 32.

Post Reply Previous topicNext topic

Who is online

Users browsing this forum: Bing [Bot] and 1 guest