From Middle English threden, thredyn (“made of thread”), equivalent to thread +‎ -en (made of).

threaden (not comparable)

1. (archaic) Made of or woven from thread.
   • 1609, William Shakespeare, “A Louers Complaint”, in Shake-speares Sonnets.[…], London: By G[eorge] Eld for T[homas] T[horpe] and are to be sold by William Aspley, →OCLC:

     threaden fillet

   • 1811, Tobias George Smollett, The Critical Review:

     Thy gloves they were made of a threaden stitch,
     Thou kept on thy hands to hide the itch; […]

   • 1861, Thomas Adams, The Works of Thomas Adams:

     That kindness plungeth him into a deeper bondage; the first was but a threaden snare, which he might break, but this is an infrangible chain of iron.

   • 1610 (first performance), Ben[jamin] Jonson, The Alchemist, London: […] Thomas Snodham, for Walter Burre, and are to be sold by Iohn Stepneth,[…], published 1612, →OCLC, (please specify the Internet Archive page), (please specify the scene number in lowercase Roman numerals):

     Your feet in mouldy slippers, for your kibes,
     A felt of rug, and a thin threaden cloak,
     That scarce would cover your no-buttocks— […]

• “threaden”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• hand tree, hartened, neatherd, Atherden, Renthead, anthered, adherent