willysmjeeps.com

Using the ORD 9 I am working on getting the correct hardware for my M38A1. I know that the "Huglock" style locking nut as described in the ORD 9 has the slotted top that expands when tightened. Where I am looking for clarification is when a nut is described as just self locking in the ORD 9? For example the four nuts used to hold the transmission crossmemeber are described as self locking in the ORD 9. When looking at pictures in the TMs it doesnt look to be the "Huglock" style. It looks to be a nut with a lock washer attached which i have seen described as a self locking nut. Basically what type of lock nut was used on these jeeps when described as self-locking.

You will always find various titles for the same type or different type nuts in supply manuals. The ORD #'s for these nuts eventually evolved into the more standard MS, AN, NAS mil spec hardware part numbers we use today. Self locking, Lock, Hug Loc, Integral Tooth Lock washer, are all types of locking nuts and are not used consistantly in our supply manuals.

So what you can do to confirm which type your manual refers to for each nut in question just go to your ORD 9 and select the ORD# for the nut you are interested in. Type that number in the google search block and add the word nut after the #. The search will yield several Stock listings with related FSN's (Federal Stock Number) or NSN's (National Stock Numbers).

Below I selected the nut you asked about and two others described in the ORD 9 as self locking or lock and listed three search results for each. Note the results I listed each describe the "Locking feature".


Nut, self locking - ORD# 503351 is a fiber lock nut. ORD 9 pg 268 (eng rear crossmember)

http://oowww.nsn-now.com/Indexing/ViewD ... 0000503351
https://nationalstocknumber.info/part-n ... _000503351
https://aerospace-hardware.com/nuts-and ... _000503351

Nut, Self locking - ORD# 442830 is an all steel hug nut type. Ord 9 pg 285

https://aerospace-hardware.com/nuts-and ... _000442830
http://www.asap-aviationprocurement.com ... 30/442830/
http://4130008140142www.nsn-now.com/Ind ... 0000442830

Nut, Lock - ORD# 443342 is an all steel hug lock type. ORD 9 pg 286

http://www.wbparts.com/rfq/5310-00-044-3342.html
http://www.asap-aerospace.com/rfq/gener ... 42/443342/
http://www.parttarget.com/5310-00-044-3 ... 22303.html

Wes,

Thank you very much for the information. I got very familiar with the websites you showed when I was searching for the clutch boot clamps I asked about over a week ago when searching their NSN #s. I didn't realize searching the ORD # would get me to the more standard MS, AN, NAS mil spec hardware part numbers. When looking for other hardware like the Huglock nuts I eventually got to the MS # in a more round about way.

Don't mean to beat a dead horse but have one more question. For example ORD #503351 is list as just self locking for the transmission crossmember. But when listed for the body mounts it is list as an elastic stop. Since they are the same ORD # is it a safe assumption that 503351 is an elastic stop for all applications? This may sound silly to some but I actually enjoy looking through the ORD 9 when searching for stuff. Its not the easiest thing to read but once you have figured it out its not bad. I have learned a lot about my A1 when going through it and looking through the forums.

I don't know if "safe to assume" is a good choice. Mil specs change over time so an ORD # when originally issued may have came into service under one spec and 4 years later remain in service under a different or revised spec. Often more than one method or material will meet the requirements of the same spec. Often manufacturers meet spec requirements using different methods or materials than another manufacturer used. The only way the phrase "safe to assume" can be used is if your cognizant of and have access to all the old specs and their revisions.

Fair enough. Thanks for the reply.