supply of supply of s- bonds of size 16 meter long for siemens make audio frequency track circuit (ftgs 917-46). , supply of s- bonds of size 16 meter long for siemens make audio frequency track circuit (ft gs 917-46). bond should be made of pvc coated wire rope of cross section approximately to 240 sq. mm. p vc coated wire should be as per is: 2266 of 1978 and pvc sheathing should be of compound type 6 as per is: 5831 of 1970 with latest amendment if any reclaimed or recycled material shall not be used. brass lug should be brazed at both ends of s bond are to be fixed along the foot of rail in form of s and both ends of brass lug are to be riveted with web of rail by copper rivets after drilling holes. note-sample approval from consignee before bulk supply. [ warranty period: 30 months after the date of delivery ] ]