part number: MS21042-4 MS21042-4 SELF-LOCKING NUT Self-locking nut For temperatures up to 450° F Nut Material: Steel Thread: 1/4-20 Supercedes part number AN364-428C Dimensions: A: .420 inch B: .316 inch C: .219 inch MSRP: Now: $3.32 Add to Cart part number: MS21042-4 MS21042-4 SELF-LOCKING NUT MSRP: Now: $3.32 Add to Cart