1/4" x 5/8" Black Luster Finish Alloy Steel Standard Dowel Pin - Holo-Krome USA / FIRST END STYLE: 1 CHAMFERED SECOND END STYLE: 4 RADIUS PIN OVERALL LENGTH: 0.625 INCHES NOMINAL PIN OVERALL DIAMETER: 0.25 INCHES NOMINAL END ITEM IDENTIFICATION: 4320-01-617-7587 SECOND END RELATIONSHIP WITH FIRST END: NOT IDENTICAL SPECIAL FEATURES: HAS A CASE HARDNESS MINIMUM OF 60HRC AND A CORE HARDNESS OF 47 - 58HRC. HAS BLACK LUSTER FINISH. MATERIAL: STEEL OVERALL