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): 1/4"
- Thread Pitch: 28
- Diameter (Dimension): 0.25"
- Diameter (Minimum): 0.245"
- Diameter (Maximum): 0.250"
- Length (Nominal): 5-1/2"
- Thread Length (Nominal): 0.75"
- Across Flats (Basic): 7/16"
- Across Flats (Minimum): 0.428"
- Across Flats (Maximum): 0.438"
- Head Height, Overall: 0.1563"
- Head Height, Overall (Minimum): 0.150"
- Head Height, Overall (Maximum): 0.163"
- 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
Category Cap Screws
Coating Color Yellow
Length (Nominal) 5-1/2"
Material Grade Grade 8
Point Chamfered Point
Origin Made in U.S.A.
Material Steel
Order Machine Thread Fasteners
System of Measurement Inch
Head Style Detail Washer Face
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO022-1428X512.zip
Diameter (Minimum) 0.245"
Diameter (Maximum) 0.250"
Product Class Externally Threaded Fasteners
Head Height, Overall (Maximum) 0.163"
Coating Zinc Plated
Brand Aspen Fasteners
Diameter (Nominal) 1/4"
POS BO022-1428X512-000400
Drive Style External Hex Drive
Across Flats (Maximum) 0.438"
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO022-1428X512
Pitch UNF Fine Thread
Thread Direction Right-Hand Thread
Across Flats (Basic) 7/16"
Head Height, Overall 0.1563"
Head Height, Overall (Minimum) 0.150"
Head Style Hex Head
Diameter (Dimension) 0.25"
Thread Pitch 28
Standards and Specifications ASME B18.2.1 and SAE J429
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Thread Length (Nominal) 0.75"
Across Flats (Minimum) 0.428"
