T-NUTS ARE GRADE 10 STEEL CHEMICAL BLACKED.
STEEL METRIC AND IMPERIAL WDS RANGE 664.
STAINLESS STEEL (316 = A4) METRIC ONLY, WDS RANGE 813.
ALSO AVAILABLE ARE - EXTENDED T-NUTS, BLANK T-NUTS, SPRING T-NUTS, BLANK EXTENDED T-NUTS, RHOMBOIDAL T-NUTS.