NBS Corp. 1/2-20 x 4-1/2" Gr. 8 Frame Bolt, Non-Indented Head, Non-Serrated, Black Phosphate BN8FLT04004420P

Featuring no serrations under the head, partial thread* as well as a non-indented head for better tool grip, NBS’ non-serrated non-indented frame bolts is one of our newest addition to our fastener line and the first of its kind in the United States. Available in grade 5, grade 8, grade alloy, class 8.8, class 10.9 and class 12.9, all non-indented frame bolts feature a trivalent** and/or black phosphate*** finish. *Partially threaded after 1-1/2” length. **Available on grade 5 and class 8.8 frame bolts. ***Available on grade 8, grade alloy, class 10.9 and class 12.9 frame bolts.