Yes, use 6 point socket to loosen.
If needed use "Freeze Lube" in the bleeder to loosen but Once crack open, close and flush any oil out using canned air etc.
If you can't get them loose using small wrench or 1/4" drive handle, Stop and wait for lube in "freeze lube" to work a day or more. Respray as needed. Repeated freezing and its "oil" and similar methods may work over some time. Many bleeders are "welded" solid by Dissimilar Metal Rot same as many bolts on boats.
Once you get OE type bleeders loose...
1. remove the bleeders, clean and lube threads w/
Brake Grease. Do Not use anything else.
2. install them and tighten hand tight.
3. install any crap hose to drain in old can/bottle that can be trashed after.
4. loosen just a crack to bleed by whatever method but know that "pedal bleeding" can make MC problems.
5. Tighten a very tiny bit over "hand tight." Fluid + Grease + Aluminum caliper can strip the threads very easy.
6. When Done flush bleeder w/ air and get "rubber" caps for the bleeders. Carefully use a rag over air hose to stop fluid spraying.
See my Cave,
Brake Service and
Bleeding MC notes1. The grease not only lube the treads but act as anti seize and sealer for people using vacuum bleeding. Normal anti-seize won't work w/ brake fluid.
3. has crap hose etc is because most won't have to bleed again for years.
If you get used O2 hoses from Doctor etc... The tapered joints molded onto the tubes fit most bleeders well.
Is why I try to save O2 and some IV tubes if I go to ER etc for any reason.
(IV parts to give you "water" or "sugar" is safe to save but don't save anything w/ any drugs. Many drugs, not just pain killers, are "Controlled Substances" that can get you jailed just having any amount.)
"Speed Bleeders" are good way to have stuck/frozen bleeders next time because will keep fluid in the bleeder "under" the valve that will draw water and often "rust" solid.
More so if you live near ocean or state uses road salt in winter.
Is only really good for racers etc that bleed often.
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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)The Ogre's Fiero Cave[This message has been edited by theogre (edited 11-03-2020).]