Abstract: This invention relates to a fixing device of the kind generally known as a cable gland for anchoring and sealing around a filamentary product such as an electrical cable. The device comprises a body, an annular cap, a clamping ring, and an elastomeric sealing sleeve. The body has a central bore extending its entire length, and is provided with a screw-threaded end portion. The annular cap includes an urging structure, and is threadably mountable on the screw-threaded end portion of the body. The clamping ring includes an annular base member upstanding from which extend a plurality of spaced apart gripping fingers. The sealing sleeve is adapted to be slidably received within the annulus of gripping fingers but to extend outwardly beyond the tips thereof. On insertion the free ends of the fingers slidably engage an inwardly tapered portion of the bore, and the urging structure can act to urge the free ends of the fingers into the tapered portion.