Anyone ever use a 4.5 & 5.5 mm socket?

[jgromada]

I noticed some of the metric socket sets still include these sizes.

My question is whether anyone has actually every used one of these?

 

[Fedwrench]

5.5 mm is quite common on HVAC actuator bolts and trim pieces on late model Ford & GM vehicles. i don't recall ever using 4.5 mm though.

 

[Shadowdog500]

Only once. The trim on the window pillar on my ‘03 grand Cherokee was held on with bolts with 4.5 mm or 5.5 mm heads.

 

[rijndael]

My 2007 Ranger has plenty of 5.5mm bolts.

 

[zktk01]

My F150 interior uses one of those can't remember which

 

[jethro29]

I use them on a lot of dash work ,such as heater cores and evaporators.

 

[Higgins]

I don't remember where I've used them. However, looking at the sockets, both have been used at some point in time over the last 40 to 50 yrs. For what it's worth.

 

[Peoria Man]

5.5mm is useful for certain (some? many?) GM ignition modules. These would be the ones that reside inside the distributor cap; I can't remember now, but the DIS ones might be 7mm.

 

[Darryl2]

Not sure if I have ever used them or not but they were needed to complete my Hansen Socket Organizers.

 

[dr_clyde]

Yep, 5.5 on my Chevy truck dash and HVAC stuff.

 

[BillK]

5.5 is very common. I think I bought mine back in the Ford TFI days for the modules. Cant say I have ever had a need for a 4.5.

 

[rlitman]

I've used 5.5mm on my Jeep cam position sensor.
Can't say I've uesd my 4.5mm or 6.5mm sockets yet.

 

[M6erfan]

As other mentioned, 5.5mm is pretty common, I use t fairly often.

 

[Mechanical Noise]

I think one of the headlight adjusters on my Neon was 4.5 mm. It was a replacement headlight.

 

[Scotto]

I've never came across one (that I know of). Would a SAE size be pretty close to a 4.5mm and a 5.5mm?

 

[toolmutt]

I've never came across one (that I know of). Would a SAE size be pretty close to a 4.5mm and a 5.5mm?

5.5 is pretty much the same as 7/32.

 

[mr.lemons]

Some previous discussions.

https://www.garagejournal.com/forum/showthread.php?t=308770
https://www.garagejournal.com/forum/showthread.php?t=147103
https://www.garagejournal.com/forum/showthread.php?t=201371
https://www.garagejournal.com/forum/showthread.php?t=393604
https://www.garagejournal.com/forum/showthread.php?t=392369
https://www.garagejournal.com/forum/showthread.php?t=102476

 

[bimmer630]

I had to buy this little 5.5mm universal socket from snappy.. i was fighting with some hard to reach hose clamps on a bmw n63 twin turbo v8


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[Aqua-Andy]

As others have said, 5.5 is all over GM vehicles.

 

[NoahG]

I find 5.5 on a lot of imported electrical devices. I believe its the M3 standard. But 7/32" also fits and Ive gotten a ton of those from surplus stores.

 

[HenryAZ]

5.5mm is the standard hex head size for an M3 bolt.

 

[Robinson1]

Interior screws on my F250 are either 4.5 or 5.5 can't remember which. Do remember my "good" set of sockets didnt include those sizes but a cheaper set I had did. Go figure.

 

[jgromada]

Interior screws on my F250 are either 4.5 or 5.5 can't remember which. Do remember my "good" set of sockets didnt include those sizes but a cheaper set I had did. Go figure.

that was the case for me too

 

[kb1982]

The plastic wiper cowling on my Saturn is held on with three 4.5 or 5.5 mm and two plastic push pins. Same for the sheetmetal screws that hold the speakers in the rear deck and door kick panels.

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[Hytekrednek]

not hex, but I have needed a Torx 5.5 a few times. EXTREMELY hard to find size. I did find one in a cheap bit set, but I am still looking for a quality made T 5.5 bit.

I have used my 5.5 socket a couple times, but it has been years ago. I dont think I have ever used a 4.5.

 

[Crazyjake8493]

I know I've used the 4.5mm exactly once, but I can't remember exactly what it was for. The 5.5mm has never been touched.

 

[FSrepair&fabrication]

Ford loves 5.5mm from the old TFI modules, fender liners on super dutys, trim and under dash. GM has them too.

 

[MarvinBerry]

I know I have those sizes in one set but I'm not a mechanic & have never touched em.

 

[TTMotorsports]

Headlight adjusting screws on my ford van was either 4.5 or 5.5 cant remember anything besides the .5mm sizing.

 

[Semi-hole mechanic]

Just used my 4.5 mm socket repairing a lamp socket. It was held together with a small machine screw with a small nut on the back. Just had to report its use since I read this thread the other day.

 

[nev]

Hardly ever. Used a couple times if I recall

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[tclark]

5.5 seems pretty common on electronic equipment

 

[mikester]

Not sure if I have ever used them or not but they were needed to complete my Hansen Socket Organizers.

Ive got 1/4" drive down to 4mm but I still need those 15mm for the other end. Need a 1/4" 5/8 too. Bugs me to see an empty spot. LOL

 

[BiggityBen]

i use 5.5mm allen just about every day but never a normal 5.5mm socket yet

 

[derosa]

I've needed one in the past but can't remember why, yesterday I needed a 4.5mm hex key to work on a French tandem, is that close enough?

 

[Lassen Forge]

4.5 was used on a Euro Moped I worked on in the early 80's, AND on a hot water control board hold down on our boiler at our home in Umbria.

Believe me, if there was no use for a tool then tool makers wouldn't make it.