This bolt is for BPW couplings on various Atlas Copco compressors. To check whether this part will fit your coupling, check your compressors model number. Our online catalogue lists all the BPW couplings spares and the related compressor model numbers. Fits XAS37, 46, 47, 56, 57, 66, 67, 76, 77, 97, 136, 146, and 186 compressors. For more information, please use our web chat Tech Talk or call us on 01206 585439.