- 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.
DIMENSIONAL ATTRIBUTES- Diameter (Nominal): 1/4"
- Thread Pitch: 28
- Diameter (Dimension): 0.25"
- Diameter (Minimum): 0.245"
- Diameter (Maximum): 0.250"
- Length (Nominal): 3-1/2"
- 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"
PRODUCT ATTRIBUTES- 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 UPC Code:
698435017085
- Coating Color:
- Clear
- Shop by Material:
- Steel
- Diameter (Dimension):
- 0.25"
- Pitch:
- UNF Fine Thread
- Length (Nominal):
- 3-1/2"
- Diameter (Nominal):
- 1/4"
- Across Flats (Basic):
- 7/16"
- Thread Pitch:
- 28
- specifications_document_url:
- https://www.aspenfasteners.com/content/2D_PDF/product80/BO018-1428X312.PDF
- Coating:
- Zinc Plated
- Category:
- Cap Screws
- Thread Length (Nominal):
- 0.75"
- System of Measurement:
- Inch
- Head Markings:
- Three radial lines 120 degrees apart and manufacturer ID
- cad_3d_viewer_url:
- https://3d.aspenfasteners.com/viewer/?cad_model=obj/BO018-1428X312
- Point:
- Chamfered Point
- Head Style Detail:
- Washer Face
- Head Style:
- Hex Head
- Across Flats (Minimum):
- 0.428"
- Head Height, Overall (Minimum):
- 0.150"
- Material Grade:
- Grade 5
- Standards and Specifications:
- ASME B18.2.1 and SAE J429
- Diameter (Maximum):
- 0.250"
- Material:
- Steel
- Diameter (Minimum):
- 0.245"
- Thread Direction:
- Right-Hand Thread
- Origin:
- Made in U.S.A.
- Drive Style:
- External Hex Drive
- Head Height, Overall (Maximum):
- 0.163"
- Product Class:
- Externally Threaded Fasteners
- Shop by System of Measurement:
- Inch
- Across Flats (Maximum):
- 0.438"
- cad_3d_file_url:
- https://3d.aspenfasteners.com/assets/obj/BO018-1428X312.zip
- Head Height, Overall:
- 0.1563"
- Brand:
- Aspen Fasteners
- Order:
- Machine Thread Fasteners
- POS:
- BO018-1428X312-000550
