Product Description
- 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.
- 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"
- 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 J429
Product Videos
Custom Field
Origin Made in U.S.A.
Pitch UNC Coarse Thread
Across Flats (Basic) 1/2"
Head Markings Three radial lines 120 degrees apart and manufacturer ID
Across Flats (Minimum) 0.489"
Point Chamfered Point
Coating Zinc Plated
Head Height, Overall 0.2031"
Head Height, Overall (Maximum) 0.211"
Thread Length (Nominal) 0.875"
Head Height, Overall (Minimum) 0.195"
Category Cap Screws
Diameter (Dimension) 0.3125"
Head Style Hex Head
Material Grade Grade 5
Diameter (Maximum) 0.3125"
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO016-51618X512.zip
Drive Style External Hex Drive
Thread Direction Right-Hand Thread
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO016-51618X512
Product Class Externally Threaded Fasteners
POS BO016-51618X512-000250
Order Machine Thread Fasteners
Thread Pitch 18
Standards and Specifications ASME B18.2.1 and SAE J429
Diameter (Nominal) 5/16"
System of Measurement Inch
Brand Aspen Fasteners
Coating Color Clear
Head Style Detail Washer Face
Material Steel
Length (Nominal) 5-1/2"
Diameter (Minimum) 0.3065"
Across Flats (Maximum) 0.500"
