The phrase "as fastened" is correct and usable in written English.
It can be used to describe something that is secured or attached in a specific manner.
Example: "The seatbelt should be worn snugly, as fastened, to ensure safety during the ride."
Alternatives: "as secured" or "as attached".
Mary sat smugly silent, her seat belt as securely fastened as if she were taking off for outer space.
"Oh, Jerry, don't let's ask for the moon -- we have the stars" ("Now, Voyager," 1942) is as imperishable as "Fasten your seat belts.
The online version of "trying on" clothes seemed tailored for me, because it allows shoppers to create virtual versions of themselves and see how different outfits look without so much as fastening a hook.
However, some problems such as inaccessibility to the inside of box-columns for assembling the continuity plates as well as fastening the bolts prevent the wide applications of these connections to connect I-beams to box-columns.
Daily tasks such as fastening a bra, putting on lipstick, holding a curling iron or wearing beautiful fashion forward shoes, are important to reserving a sense of independence and femininity.
The paper describes a series of web crippling tests on cold-formed unlipped channels with flanges restrained (fastened) as well as channels with flanges unrestrained (unfastened).
Etiquette follows that double-breasted jackets must be worn closed at all times, and a trick is to know that there is an interior button that must be fastened as well.
The movements required to put on different garments and parts of garments – i.e., dresses, tops, coats, collars, sleeves – as well as to fasten them and the variation of the implicated movements with reference to their position were directly observed and recorded.
As soon as you fasten your seatbelt on the flight, be sure to reset your clock.
