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на всякий случай stresses
gen.	keep on the safe side; for whatever it may be worth (Jan1970); just in case you're wondering (4uzhoj); be safe (Юрий Гомон); be on the safe side; just in case; for the sake of good order (alk); for security (q3mi4); just to be safe (Anglophile); just to be on the safe side (Anglophile); as a safeguard (Anglophile); just to be sure (Shabe); at all events; hit or miss; least ways; anyway (sever_korrespondent)
Gruzovik	against every eventuality
brit.	on spec (Anglophile)
dat.proc.	belt and braces (capissimo)
idiom.	cover bases (She eats a balanced diet, but takes vitamin pills anyway, to cover her bases. VLZ_58); only as a protective measure (Washington Post Alex_Odeychuk)
inet.	JIC (just in case tats)
inf.	for good measure (I always put a little extra salt in the soup for good measure. Val_Ships); as a precaution (traffic was shut down as a precaution Val_Ships); just so you know (как вводная фраза 4uzhoj); 'cause you never know (Баян); on the off chance; for the record (Just for the record, I was not even born when the events I'm describing happened. 4uzhoj); just for the case (allp1ne)
law	de bene esse
Makarov.	be in the safe side
math.	in any case; make sure
tech.	on the safe side; in case (PereVal)
на всякий пожарный случай
idiom.	be on a safe side (maystay)

на всякий случай: 26 phrases in 11 subjects

American usage, not spelling	1
Business	1
General	12
Idiomatic	1
Informal	3
Ironical	1
Literature	1
Makarov	3
Medical	1
Slang	1
Teenager slang	1