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): 3-1/2"
- 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
Product Class Externally Threaded Fasteners
Head Height, Overall (Maximum) 0.211"
Across Flats (Minimum) 0.489"
Across Flats (Basic) 1/2"
Thread Pitch 18
Head Height, Overall 0.2031"
Head Height, Overall (Minimum) 0.195"
Thread Direction Right-Hand Thread
Diameter (Nominal) 5/16"
Head Style Hex Head
Diameter (Minimum) 0.3065"
Brand Aspen Fasteners
Diameter (Maximum) 0.3125"
Coating Zinc Plated
Order Machine Thread Fasteners
Origin Made in U.S.A.
Head Style Detail Washer Face
Pitch UNC Coarse Thread
Standards and Specifications ASME B18.2.1 and SAE J429
Across Flats (Maximum) 0.500"
Thread Length (Nominal) 0.875"
Head Markings Three radial lines 120 degrees apart and manufacturer ID
Drive Style External Hex Drive
Point Chamfered Point
System of Measurement Inch
POS BO016-51618X312-000450
Material Grade Grade 5
Diameter (Dimension) 0.3125"
Length (Nominal) 3-1/2"
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO016-51618X312.zip
Category Cap Screws
Material Steel
Coating Color Clear
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO016-51618X312
