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DIMENSIONAL ATTRIBUTES- Diameter (Nominal): 5/16"- Thread Pitch: 18- Diameter (Dimension): 0.3125"- Diameter (Minimum): 0.3065"- Diameter (Maximum): 0.3125"- Length (Nominal): 5-1/2"- Thread Length (Nominal): 0.875"- Across Flats (Basic): 1/2"- Across Flats (Minimum): 0.489"- Across Flats (Maximum): 0.500"- Head Height, Overall: 0.2031"- Head Height, Overall (Minimum): 0.195"- Head Height, Overall (Maximum): 0.211"PRODUCT ATTRIBUTES- Category: Cap Screws- System of Measurement: Inch- Brand: Aspen Fasteners- Head Style: Hex Head- Head Style Detail: Washer Face- Head Markings: Three radial lines 120 degrees apart and manufacturer ID- Drive Style: External Hex Drive- Pitch: UNC Coarse Thread- Thread Direction: Right-Hand Thread- Point: Chamfered Point- Material: Steel- Material Grade: Grade 5- Coating: Zinc Plated- Coating Color: Clear- Origin: Made in U.S.A.- Standards and Specifications: ASME B18.2.1 and SAE J429NB: Product images are copyrighted artistic representations which may not reflect the product's exact appearance, proportions and/or relative dimensions.
Hex cap screws are manufactured to tighter tolerances as compared to hex bolts.
The heads of grade 5 steel fasteners are typically marked with 3 raised radial lines.
The washer face under the head provides a precision bearing surface.
Grade 5 steel fasteners have a minimum tensile strength of 105,000 pounds per square inch.
The chamfered point improves engagement with a nut or pre-tapped hole.
