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): 4-1/4"
- 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
Head Height, Overall (Maximum) 0.211"
Material Steel
Coating Zinc Plated
Product Class Externally Threaded Fasteners
Drive Style External Hex Drive
Diameter (Maximum) 0.3125"
Origin Made in U.S.A.
Diameter (Minimum) 0.3065"
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO016-51618X414
Order Machine Thread Fasteners
Across Flats (Basic) 1/2"
Standards and Specifications ASME B18.2.1 and SAE J429
System of Measurement Inch
Material Grade Grade 5
Pitch UNC Coarse Thread
Head Markings Three radial lines 120 degrees apart and manufacturer ID
Across Flats (Minimum) 0.489"
Diameter (Dimension) 0.3125"
Head Style Hex Head
Coating Color Clear
Thread Direction Right-Hand Thread
Thread Length (Nominal) 0.875"
Length (Nominal) 4-1/4"
Across Flats (Maximum) 0.500"
Head Style Detail Washer Face
Category Cap Screws
POS BO016-51618X414-000350
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO016-51618X414.zip
Brand Aspen Fasteners
Point Chamfered Point
Diameter (Nominal) 5/16"
Head Height, Overall 0.2031"
Thread Pitch 18
Head Height, Overall (Minimum) 0.195"
