1/4-20 X 3-1/4 Full Thread 500 pcs Zinc Round Head A307 Steel Carriage Bolts Square Neck

(500 pcs) 1/4'-20 X 3-1/4', Carriage Bolts, Round Head, Square Neck, Full Thread, A307 Steel, Zinc: Industrial & Scientific. (500 pcs) 1/4"-20 X 3-1/4", Carriage Bolts, Round Head, Square Neck, Full Thread, A307 Steel, Zinc: Industrial & Scientific. Also known as coach bolts, are typically used to fasten metal to wood. 。 The square neck under the head locks the bolt into place. 。 ASTM A307 steel is a standard "industrial spec" low carbon grade of steel. 。 A307 steel fasteners have a minimum tensile strength of 60,000 pounds per square inch. 。 Can be used as a security fastener. The smooth head prevents unfastening from the head side. 。 Diameter (Nominal): 1/4"。Diameter (Dimension): 0.25"。Thread Pitch: 20。Length (Nominal): 3-1/4"。Thread Length (Minimum): 3.094"。Neck Width: 0.26"。Neck Height: 0.156"。Head Diameter: 0.594"。Head Height, Overall: 0.145"。Category: Carriage Bolts。System of Measurement: US Units。Brand: Aspen Fasteners®。Head Style: Round Head。Head Style Detail: Square Neck。Thread Length: Full Thread。Thread Direction: Right-Hand Thread。Material: Steel。Material Grade: A307 Steel。Coating: Zinc Plated。Coating Color: Clear。Standards and Specifications: ASME B18.5。NB: Product images are copyrighted artistic representations which may not reflect the product's exact appearance, proportions and/or relative dimensions.。。。。