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): 5/8"
- Thread Pitch: 18
- Diameter (Dimension): 0.625"
- Diameter (Minimum): 0.617"
- Diameter (Maximum): 0.625"
- Length (Nominal): 2-3/4"
- Thread Length (Nominal): 1.5"
- Across Flats (Basic): 15/16"
- Across Flats (Minimum): 0.922"
- Across Flats (Maximum): 0.938"
- Head Height, Overall: 25/64"
- Head Height, Overall (Minimum): 0.378"
- Head Height, Overall (Maximum): 0.403"
- 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) 5/8"
Material Grade Grade 8
Thread Direction Right-Hand Thread
Across Flats (Maximum) 0.938"
Diameter (Dimension) 0.625"
Standards and Specifications ASME B18.2.1 and SAE J429
Point Chamfered Point
Head Style Hex Head
Drive Style External Hex Drive
Category Cap Screws
System of Measurement Inch
Coating Color Yellow
Order Machine Thread Fasteners
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Head Height, Overall (Maximum) 0.403"
POS BO022-5818X234-000125
Head Style Detail Washer Face
Thread Length (Nominal) 1.5"
Coating Zinc Plated
Material Steel
Diameter (Maximum) 0.625"
Diameter (Minimum) 0.617"
Thread Pitch 18
Pitch UNF Fine Thread
Product Class Externally Threaded Fasteners
Length (Nominal) 2-3/4"
Brand Aspen Fasteners
Origin Made in U.S.A.
Across Flats (Minimum) 0.922"
Across Flats (Basic) 15/16"
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO022-5818X234.zip
Head Height, Overall 25/64"
Head Height, Overall (Minimum) 0.378"
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO022-5818X234
