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): 1/2"
- Thread Length (Nominal): 0.5"
- 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
Brand Aspen Fasteners
System of Measurement Inch
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Length (Nominal) 1/2"
Across Flats (Minimum) 0.428"
Diameter (Maximum) 0.250"
Material Steel
Head Style Hex Head
Product Class Externally Threaded Fasteners
Diameter (Nominal) 1/4"
Thread Length (Nominal) 0.5"
Standards and Specifications ASME B18.2.1 and SAE J429
Across Flats (Maximum) 0.438"
Pitch UNF Fine Thread
Diameter (Dimension) 0.25"
Coating Color Yellow
Coating Zinc Plated
Drive Style External Hex Drive
Material Grade Grade 8
Thread Direction Right-Hand Thread
Category Cap Screws
Head Height, Overall 0.1563"
Origin Made in U.S.A.
Head Height, Overall (Maximum) 0.163"
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO022-1428X12
Head Height, Overall (Minimum) 0.150"
Across Flats (Basic) 7/16"
Thread Pitch 28
POS BO022-1428X12-003300
Order Machine Thread Fasteners
Head Style Detail Washer Face
Diameter (Minimum) 0.245"
Point Chamfered Point
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO022-1428X12.zip
