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Sales Systems Limited Products and Services > Fasteners Reference Guide > Bolts / Screws > Square and Hex Bolts and Screws > Heavy Hex Bolts > Item # HHB25000XXX  
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Item # HHB25000XXX, Heavy Hex Bolt, 2-1/2" Nominal Dia.


  • Surface Condition. Bolts need not be finished on any surface except threads.
  • Top of Head. Top of head shall be full form and chamfered with the diameter of chamfer circle being equal to the maximum width across flats, within a tolerance of minus 15 percent.
  • Head Taper. Maximum width across flats and across corners shall not be exceeded. No transverse section through the head between 25 percent and 75 percent of actual head height, as measured from the bearing surface, shall be less than the minimum width across flats and across corners.
  • Bearing Surface. A die seam across the bearing surface is permissible. Bearing surface shall be perpendicular to the axis of the body within a tolerance of 3 deg for 1 in. size and smaller, and 2 deg for sizes larger than 1 in. Angularity measurement shall be taken at a location to avoid interference from a die seam.
  • True Position of Head. The axis of the head shall be located at true position with respect to the axis of the body (determined over a distance under the head equal to one diameter) within a tolerance zone having a diameter equivalent to 6 percent of the maximum width across flats, regardless of feature size.




Manufacturer  · Specifications  · Codes and Standards  · Thread Length for Bolt Lengths

Manufacturer

Manufacturer
Industrial Fasteners Institute


Specifications

Product
Square and Hex Bolts and Screws

Unit of Measure
English

Nominal Size or Basic Product Diameter
2-1/2 in

Nominal Size or Basic Product Diameter (Decimal)
2.5000 in

Max. Full-Size Body Diameter (E)
2.559 in

Min. Full-Size Body Diameter (E)
2.461 in

Basic Width Across Flats (F)
3-7/8 in

Max. Width Across Flats (F)
3.875 in

Min. Width Across Flats (F)
3.750 in

Max. Width Across Corners (G)
4.474 in

Min. Width Across Corners (G)
4.275 in

Basic Head Height (H)
1-21/32 in

Max. Head Height (H)
1.708 in

Min. Head Height (H)
1.479 in

Max. Radius of Fillet (R)
0.19 in

Min. Radius of Fillet (R)
0.060 in


Codes and Standards

Codes and Standards
ASME B18.2.1 1996


Thread Length for Bolt Lengths

Nom. LT for Bolt Length (6 in. and Shorter)
5.250 in

Nom. LT for Bolt Length (Over 6 in.)
5.500 in


 MORE IMAGES 

·  Bolt with Reduced Diameter Body

·  Length Tolerances for Square and Hex Bolts and Screws


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