1/2″-13 x 3-1/2″ Blackened Steel Hex Bolts, 4 PieceCondition:* New Surplus Stock, In Bulk OEM Packaging. As Pictured.Additional Notes:* Diameter: 1/2″* Thread Count: 13* Length: 3-1/2″* Length Tolerance: +0.06″ / -0.08″* Thread Direction: Right Hand* Head Style: Hex* Drive Type: External Hex* Head Height: 0.302″ – 0.323″* Width Across The Flats: 3/4″* Fully Threaded: No* Thread Length: Minimum: 1-1/4″* Dimensional Standard: ASME B18.2.1UNKRP25016