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M105A3 hub bearing nut and lock nut size

ohsmily

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Location
Davis, CA
3.5" is too big. 3 3/8" is too small. Before I order any more sockets that are wrong, does any one have the specs for the M105A3 hub nut and lock nut size? (They're the same) This is driving me "nuts "(yuck yuck yuck)

ISSUE RESOLVED : 3 3/8" was the right socket. The locking washer tabs were bent over and had to be pried up.
 

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Last edited:

Guyfang

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Nut tech info
THREAD CLASS2B
THREAD DIRECTIONRIGHT-HAND
NUT STYLEPLAIN, OCTAGON
NUT HEIGHT0.310 INCHES MINIMUM AND 0.315 INCHES MAXIMUM
WIDTH ACROSS FLATS2.969 INCHES MINIMUM AND 3.031 INCHES MAXIMUM
THREAD SERIESUNS
FEATURES PROVIDEDCASEHARDENED
THREAD QUANTITY PER INCH16
NOMINAL THREAD SIZE2.438 INCHES
BEARING SURFACE TYPECHAMFERED
MATERIALSTEEL COMP 1020 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-635 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
 

ohsmily

Member
36
29
18
Location
Davis, CA
Nut tech info
THREAD CLASS2B
THREAD DIRECTIONRIGHT-HAND
NUT STYLEPLAIN, OCTAGON
NUT HEIGHT0.310 INCHES MINIMUM AND 0.315 INCHES MAXIMUM
WIDTH ACROSS FLATS2.969 INCHES MINIMUM AND 3.031 INCHES MAXIMUM
THREAD SERIESUNS
FEATURES PROVIDEDCASEHARDENED
THREAD QUANTITY PER INCH16
NOMINAL THREAD SIZE2.438 INCHES
BEARING SURFACE TYPECHAMFERED
MATERIALSTEEL COMP 1020 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-635 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
I really appreciate the response. Are you sure this is for an M105A3, as opposed to an A2 or A1? The nut is close to 3.5 inches but seemingly under by a bit but not less than 5 3/8 given that socket won't go on there.
 

Guyfang

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Your right! I am sorry!! To many Tm's open at one time.

NSN: 5310-00-741-1379
Part #: 7411379
NUT,ADJUSTING
2 5/8-16

Tech data:

THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
NUT STYLEPLAIN, OCTAGON
NUT HEIGHT0.305 INCHES MINIMUM AND 0.319 INCHES MAXIMUM
END ITEM IDENTIFICATIONW/S; TRLR, CARGO, 3/4T, 2-WHL, TAM D08607; GUIDED MISSILE, INTERCEPT; TRAILER TANK, WATER 400 GAL, M149A2; CHASSIS, TRLR, GP, 3 1/2T, 2-WHL, TAM D00807; CARGO TRAILER, M105A3
WIDTH ACROSS FLATS3.344 INCHES MINIMUM AND 3.406 INCHES MAXIMUM
THREAD SERIESUN
FEATURES PROVIDEDCASEHARDENED
THREAD QUANTITY PER INCH16
HARDNESS RATING89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
NOMINAL THREAD SIZE2.625 INCHES
COUNTERSINK ANGLE90.0 DEGREES MINIMUM NUT AND 100.0 DEGREES MAXIMUM NUT
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
MATERIALSTEEL COMP 1015 OVERALL OR STEEL COMP 1016 OVERALL OR STEEL COMP 1017 OVERALL OR STEEL COMP 1018 OVERALL OR STEEL COMP 1019 OVERALL OR STEEL COMP 1020 OVERALL OR STEEL COMP 1022 OVERALL OR STEEL COMP 1023 OVERALL OR STEEL COMP 1025 OVERALL
 

ohsmily

Member
36
29
18
Location
Davis, CA
Your right! I am sorry!! To many Tm's open at one time.

NSN: 5310-00-741-1379
Part #: 7411379
NUT,ADJUSTING
2 5/8-16

Tech data:

THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
NUT STYLEPLAIN, OCTAGON
NUT HEIGHT0.305 INCHES MINIMUM AND 0.319 INCHES MAXIMUM
END ITEM IDENTIFICATIONW/S; TRLR, CARGO, 3/4T, 2-WHL, TAM D08607; GUIDED MISSILE, INTERCEPT; TRAILER TANK, WATER 400 GAL, M149A2; CHASSIS, TRLR, GP, 3 1/2T, 2-WHL, TAM D00807; CARGO TRAILER, M105A3
WIDTH ACROSS FLATS3.344 INCHES MINIMUM AND 3.406 INCHES MAXIMUM
THREAD SERIESUN
FEATURES PROVIDEDCASEHARDENED
THREAD QUANTITY PER INCH16
HARDNESS RATING89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
NOMINAL THREAD SIZE2.625 INCHES
COUNTERSINK ANGLE90.0 DEGREES MINIMUM NUT AND 100.0 DEGREES MAXIMUM NUT
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
MATERIALSTEEL COMP 1015 OVERALL OR STEEL COMP 1016 OVERALL OR STEEL COMP 1017 OVERALL OR STEEL COMP 1018 OVERALL OR STEEL COMP 1019 OVERALL OR STEEL COMP 1020 OVERALL OR STEEL COMP 1022 OVERALL OR STEEL COMP 1023 OVERALL OR STEEL COMP 1025 OVERALL
Well darn, it seems like 3 3/8 should fit given those dimensions...but it wont sleeve over. * sigh *
 
Last edited by a moderator:

Guyfang

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Tech data for the wheel bearing socket:

WRENCHING SURFACE SIZE3.375 INCHES NOMINAL SINGLE END
DRIVE SURFACE SIZE0.750 INCHES NOMINAL SINGLE END
FEATURES PROVIDEDMANUAL TOOL
WRENCHING SURFACE SHAPE8 POINT SINGLE END INTERNAL
DRIVE END SHAPESQUARE SINGLE END INTERNAL
FUNCTIONAL DESCRIPTIONUSED WITH TORQUE WRENCH TO TIGHTEN/LOOSEN TRUCK WHEEL BEARING LOCKNUTS
MATERIALSTEEL OVERALL
SURFACE TREATMENTOXIDE OVERALL
STYLE DESIGNATORINTERNAL-INTERNAL
SPECIFICATION/STANDARD DATA05047-ASME B107.1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NONDEFINITIVE SPEC/STD DATA2 TYPE
 

ohsmily

Member
36
29
18
Location
Davis, CA
Take a good look at the hub nuts, and make sure the locking washer tab is bent back. Someone could have rounded the corners of the nun.
Thank for this. The tabs of the lock washer was what was preventing the socket from sleeving over the bolt. It was all covered in grease and I didn't notice it until you brought this up and I dug around in there. The 3 3/8 socket works perfectly.

Thanks again fellas!

Now to figure out the torque spec when I put it back.
 

ohsmily

Member
36
29
18
Location
Davis, CA
It was quite a chore dismounting and then mounting the tire/wheel/drum assembly mostly because I did it alone. Heavy stuff. Do you guys leave the wheel mounted to the hub when you do this? Or remove the lugs and take the wheel off first to make things more manageable? I left the wheel/tire mounted to the hub and removed the whole assembly as one after taking the axle nuts off and sliding the bearing out. Heavy.
 
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