Large Serrated Hex Flange Bolts (Full Thread): Dimensions & Specifications

Large Serrated Hex Flange Bolt Drawing 

Large Serrated Hex Flange Bolt (Full Thread) (ANSI B1.1 UNC, UNF)

Nominal
Size of Screw

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 Width Across Flats
(F)		 Width Across Corners
(G)		 Flange Diameter
(B)		 Flange Thickness
(U)		 Head
Height
(H)
Max Min Max Min Max Min Max
1/4 0.375 0.367 0.433 0.409 0.625 0.04 0.280
5/16 0.500 0.489 0.577 0.548 0.820 0.05 0.345
3/8 0.562 0.551 0.650 0.628 0.915 0.06 0.390
7/16 0.6250 0.612 0.722 0.685 1.131 0.07 0.460
1/2 0.7500 0.736 0.866 0.825 1.205 0.08 0.510

 

Grade 2

Grade 5

 Grade 8.2
Material: AISI 1010 Material: AISI 1035 Material: 10B21
Tensile Strength: Min 74,000 psi

Tensile Strength: Min 120,000 psi

 Tensile Strength: Min 150,000 psi
Screw Threads: ANSI B1.1 UNC, UNF Core Hardness: HRC 25~34 Core Hardness: HRC 33~39
Class of Thread: 1/4 through 1/2, 2A, 3A

Surface Hardness: HR30N MAX 54

 Surface Hardness: HR30N MAX 58.6

Screw Threads: ANSI B1.1 UNC, UNF

 Screw Threads: ANSI B1.1 UNC, UNF

Class of Thread: 1/4 through 1/2, 2A, 3A

 Class of Thread: 1/4 through 1/2, 2A, 3A