BobTail System

Follow the form below to construct a part number for ordering BobTail pins and their respective collars. Refer to the Grip Tables (pages 6-7) for grip numbers. Pins: BT (HEAD STYLE) - (MATERIAL) (DIAMETER) - (GRIP NUMBER) (FINISH) Example: BTR-BR20-8 is a BobTail Pin, Round Head, Grade 5 Carbon Steel, 5/8" Diameter, Grip 8, Oil Finish Collars: BT (TYPE) - (MATERIAL) (DIAMETER) (FINISH) Example: BTC5-R20UA is a BobTail Collar, Grade 5 Carbon Steel, 5/8" Diameter, Zinc Plated BOLT HEAD STYLE PREFIX BOLT MATERIAL CODE DIA. CODE GRIP FINISH SUFFIX Grade 5 1/2" 16 Refer to Grip Tables on pages 6-7 Zinc Plate, Clear Chromate .0003" G* Round BTR Medium Carbon Steel BR 5/8" 20 Zinc Plate, Clear Chromate .0004" GA * Truss BT30 3/4" 24 Geomet - 1 Coat NP 90° Flush BT90 7/8" 28 Geomet - 2 Coat D1 Grade 8 1" 32 Oil Finish no suffix Flanged BT Alloy Steel DT Inch Series GRADE / CLASS PREFIX MATERIAL CODE DIA. CODE FINISH SUFFIX Grade 5 BTC5- Low Carbon Steel R 1/2" 16 Zinc Plate UA Grade 8 BTC8- Low Carbon Steel R 5/8" 20 Zinc Plate BL Class 8.8 MBTC- Low Carbon Steel BR 3/4" 24 Zinc Plate UA Class 10.9 MBTC- Low Carbon Steel R 7/8" 28 Zinc Plate BL 1" 32 12mm 12 14mm 14 16mm 16 20mm 20 Collars Metric Series BOLT HEAD STYLE PREFIX BOLT MATERIAL CODE DIA. CODE GRIP FINISH SUFFIX Class 8.8 12mm 12 Refer to Grip Tables on pages 6-7 Zinc Plate, Clear Chromate .0003" G ** Round MBTR Medium Carbon Steel BR 14mm 14 Zinc Plate, Clear Chromate .0004" GA ** Flanged MBT 16mm 16 Geomet - 1 Coat NP Class 10.9 20mm 20 Geomet - 2 Coat D1 Flanged MBT Alloy Steel DT Oil Finish no suffix Ordering Information **Only available for Class 8.8 *Only available for Grade 5 11 Howmet Fastening Systems