Product Description
- Hex cap screws are manufactured to tighter tolerances as compared to hex bolts.
- The heads of grade 5 steel fasteners are typically marked with 3 raised radial lines.
- The washer face under the head provides a precision bearing surface.
- Grade 5 steel fasteners have a minimum tensile strength of 105,000 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): 2-1/4"
- 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: Three radial lines 120 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 5
- Coating: Zinc Plated
- Coating Color: Clear
- Origin: Made in U.S.A.
- Standards and Specifications: ASME B18.2.1 and SAE J429
Product Videos
Custom Field
Length (Nominal) 2-1/4"
Origin Made in U.S.A.
cad_3d_file_url https||//3d.aspenfasteners.com/assets/obj/BO018-1428X214.zip
Head Height, Overall 0.1563"
Pitch UNF Fine Thread
Head Markings Three radial lines 120 degrees apart and manufacturer ID
Material Steel
Thread Length (Nominal) 0.75"
Brand Aspen Fasteners
cad_3d_viewer_url https||//3d.aspenfasteners.com/viewer/?cad_model=obj/BO018-1428X214
Diameter (Maximum) 0.250"
Diameter (Minimum) 0.245"
Head Style Hex Head
Across Flats (Basic) 7/16"
Category Cap Screws
Thread Pitch 28
Drive Style External Hex Drive
Product Class Externally Threaded Fasteners
Material Grade Grade 5
Point Chamfered Point
Coating Color Clear
Across Flats (Minimum) 0.428"
Diameter (Nominal) 1/4"
Head Height, Overall (Minimum) 0.150"
POS BO018-1428X214-001000
Across Flats (Maximum) 0.438"
Head Height, Overall (Maximum) 0.163"
Thread Direction Right-Hand Thread
Diameter (Dimension) 0.25"
System of Measurement Inch
Head Style Detail Washer Face
Standards and Specifications ASME B18.2.1 and SAE J429
Coating Zinc Plated
Order Machine Thread Fasteners
