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): 4"
- 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
Material Grade Grade 8
Standards and Specifications ASME B18.2.1 and SAE J429
Point Chamfered Point
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO022-1428X4
Origin Made in U.S.A.
Head Markings Six radial lines 60 degrees apart and manufacturer ID
POS BO022-1428X4-000400,BO022-1428X4-000450
Head Height, Overall (Maximum) 0.163"
Drive Style External Hex Drive
Head Height, Overall (Minimum) 0.150"
Coating Zinc Plated
Thread Direction Right-Hand Thread
Thread Pitch 28
Category Cap Screws
Diameter (Dimension) 0.25"
Head Style Detail Washer Face
System of Measurement Inch
Across Flats (Minimum) 0.428"
Brand Aspen Fasteners
Across Flats (Basic) 7/16"
Thread Length (Nominal) 0.75"
Length (Nominal) 4"
Diameter (Minimum) 0.245"
Coating Color Yellow
Head Height, Overall 0.1563"
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO022-1428X4.zip
Diameter (Nominal) 1/4"
Order Machine Thread Fasteners
Material Steel
Diameter (Maximum) 0.250"
Product Class Externally Threaded Fasteners
Across Flats (Maximum) 0.438"
Head Style Hex Head
Pitch UNF Fine Thread
