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): 1-3/4"
- 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
Order Machine Thread Fasteners
Coating Color Yellow
Product Class Externally Threaded Fasteners
Material Grade Grade 8
Across Flats (Minimum) 0.428"
Head Markings Six radial lines 60 degrees apart and manufacturer ID
Coating Zinc Plated
Point Chamfered Point
Pitch UNF Fine Thread
Diameter (Minimum) 0.245"
Category Cap Screws
Thread Length (Nominal) 0.75"
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO022-1428X134.zip
Drive Style External Hex Drive
Diameter (Dimension) 0.25"
Head Height, Overall (Minimum) 0.150"
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO022-1428X134
Origin Made in U.S.A.
Brand Aspen Fasteners
Head Style Detail Washer Face
Standards and Specifications ASME B18.2.1 and SAE J429
Across Flats (Basic) 7/16"
Thread Direction Right-Hand Thread
Across Flats (Maximum) 0.438"
Length (Nominal) 1-3/4"
POS BO022-1428X134-001400
System of Measurement Inch
Head Style Hex Head
Thread Pitch 28
Diameter (Maximum) 0.250"
Head Height, Overall 0.1563"
Head Height, Overall (Maximum) 0.163"
Material Steel
Diameter (Nominal) 1/4"
