- 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.
DIMENSIONAL ATTRIBUTES- Diameter (Nominal): 5/16"
- Thread Pitch: 18
- Diameter (Dimension): 0.3125"
- Diameter (Minimum): 0.3065"
- Diameter (Maximum): 0.3125"
- Length (Nominal): 3"
- Thread Length (Nominal): 0.875"
- Across Flats (Basic): 1/2"
- Across Flats (Minimum): 0.489"
- Across Flats (Maximum): 0.500"
- Head Height, Overall: 0.2031"
- Head Height, Overall (Minimum): 0.195"
- Head Height, Overall (Maximum): 0.211"
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: UNC Coarse Thread
- Thread Direction: Right-Hand Thread
- Point: Chamfered Point
- Material: Steel
- Material Grade: Grade 5
- Coating: Uncoated
- Standards and Specifications: ASME B18.2.1 and SAE J429
Product UPC Code:
698435050112
- Across Flats (Basic):
- 1/2"
- Across Flats (Maximum):
- 0.500"
- Across Flats (Minimum):
- 0.489"
- Brand:
- Aspen Fasteners
- Category:
- Cap Screws
- Coating:
- Uncoated
- Diameter (Dimension):
- 0.3125"
- Diameter (Maximum):
- 0.3125"
- Diameter (Minimum):
- 0.3065"
- Diameter (Nominal):
- 5/16"
- Drive Style:
- External Hex Drive
- Head Height, Overall:
- 0.2031"
- Head Height, Overall (Maximum):
- 0.211"
- Head Height, Overall (Minimum):
- 0.195"
- Head Markings:
- Three radial lines 120 degrees apart and manufacturer ID
- Head Style:
- Hex Head
- Head Style Detail:
- Washer Face
- Length (Nominal):
- 3"
- Material:
- Steel
- Material Grade:
- Grade 5
- Order:
- Machine Thread Fasteners
- POS:
- BO053-51618X3-000650
- Pitch:
- UNC Coarse Thread
- Point:
- Chamfered Point
- Product Class:
- Externally Threaded Fasteners
- Standards and Specifications:
- ASME B18.2.1 and SAE J429
- System of Measurement:
- Inch
- Thread Direction:
- Right-Hand Thread
- Thread Length (Nominal):
- 0.875"
- Thread Pitch:
- 18
- cad_3d_file_url:
- https://3d.aspenfasteners.com/assets/obj/BO053-51618X3.zip
- cad_3d_viewer_url:
- https://3d.aspenfasteners.com/viewer/?cad_model=obj/BO053-51618X3
- specifications_document_url:
- https://www.aspenfasteners.com/content/2D_PDF/product81/BO053-51618X3.PDF
- Shop by Material:
- Steel
- Shop by System of Measurement:
- Inch
