Product Description
- Hex cap screws are manufactured to tighter tolerances as compared to hex bolts.
- The heads of grade 8 steel fasteners are typically marked with 6 raised radial lines.
- The washer face under the head provides a precision bearing surface.
- Grade 8 steel fasteners have a minimum tensile strength of 150,000 pounds per square inch.
- The chamfered point improves engagement with a nut or pre-tapped hole.
- In general, fine thread fasteners are about 10% stronger than coarse threads under static loading.
- Diameter (Nominal): 5/16"
- Thread Pitch: 24
- Diameter (Dimension): 0.3125"
- Diameter (Minimum): 0.3065"
- Diameter (Maximum): 0.3125"
- Length (Nominal): 7/8"
- 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"
- Category: Cap Screws
- System of Measurement: Inch
- Brand: Aspen Fasteners
- Head Style: Hex Head
- Head Style Detail: Washer Face
- Head Markings: Six radial lines 60 degrees apart and manufacturer ID
- Drive Style: External Hex Drive
- Pitch: UNF Fine Thread
- Thread Direction: Right-Hand Thread
- Point: Chamfered Point
- Material: Steel
- Material Grade: Grade 8
- Coating: Zinc Plated
- Coating Color: Yellow
- Origin: Made in U.S.A.
- Standards and Specifications: ASME B18.2.1 and SAE J429
Product Videos
Custom Field
Diameter (Nominal) 5/16"
Pitch UNF Fine Thread
Brand Aspen Fasteners
Diameter (Maximum) 0.3125"
POS BO022-51624X78-001500
Across Flats (Basic) 1/2"
Thread Length (Nominal) 0.875"
Material Grade Grade 8
Origin Made in U.S.A.
Head Height, Overall 0.2031"
Product Class Externally Threaded Fasteners
Across Flats (Minimum) 0.489"
Coating Zinc Plated
Point Chamfered Point
Head Style Hex Head
System of Measurement Inch
Category Cap Screws
Standards and Specifications ASME B18.2.1 and SAE J429
Length (Nominal) 7/8"
Head Style Detail Washer Face
Head Height, Overall (Minimum) 0.195"
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cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO022-51624X78.zip
Diameter (Minimum) 0.3065"
Across Flats (Maximum) 0.500"
Material Steel
Drive Style External Hex Drive
Diameter (Dimension) 0.3125"
Coating Color Yellow
Thread Pitch 24
Order Machine Thread Fasteners
Head Height, Overall (Maximum) 0.211"
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Thread Direction Right-Hand Thread
