Specification Brand : Aspen Fasteners BulletPoint1 : Machine bolts are most commonly used in construction applications. BulletPoint2 : Machine bolts tolerances are typically less precise than those of cap screws. BulletPoint3 : Unlike cap screws, does not have a washer face or a machined point. ExteriorFinish : Unfinished GradeRating : Low Carbon Steel ItemName : (700 pcs) 5/16"-18 X 1-1/4", Machine Bolts, Square Head, Steel ItemPackageDimensions_Height : 7 inches ItemPackageDimensions_Length : 9 inches ItemPackageDimensions_Width : 9 inches ItemPackageQuantity : 700 ItemTypeKeyword : square-head-bolts Manufacturer : Aspen Fasteners ManufacturerGrade : Low Carbon Steel Material : Alloy Steel ModelNumber : BO034-51618X114-000700 PartNumber : BO034-51618X114-000700 ProductDescription : Machine bolts are most commonly used in construction applications. Machine bolts tolerances are typically less precise than those of cap screws. Unlike cap screws, does not have a washer face or a machined point.DIMENSIONAL ATTRIBUTES Diameter (Nominal): 5/16" Thread Pitch: 18 Diameter (Dimension): 0.3125" Length (Nominal): 1-1/4" Thread Length (Nominal): 0.875" Across Flats (Basic): 1/2" Head Height, Overall: 0.22"PRODUCT ATTRIBUTES Category: Machine Bolts System of Measurement: Inch Brand: Aspen Fasteners Head Style: Square Head Drive Style: External Square Drive Thread Direction: Right-Hand Thread Material: Steel Material Grade: Low Carbon Steel Coating: Uncoated Origin: Origin Undefined Standards and Specifications: ASME B18.2.1 ProductSiteLaunchDate : 2019-07-29T10:57:14.607Z Size : 5/16"-18 X 1-1/4" UnitCount : 700 UnspscCode : 31161500