Heavy Hex Nuts Supplier

NUTS - MOST COMMON INCH (US) STANDARD SPECIFICATIONS

ASTM A563 Standard Specification for Carbon and Alloy Steel Nuts
ASTM A194 Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
ASTM F594-01 Standard Specification for Stainless Steel Nuts
SAE J995 Mechanical and Material Requirements for Steel Nuts
ASME B18.16.6 NYLON INSERT LOCKNUTS (INCH SERIES)

HEX NUTS - BASIC DIMENSIONS

 

HEX NUTS - STRENGTH

 

HEX NUTS - BASIC DIMENSIONS

BASIC DIMENSIONS FOR INCH SERIES FINISH HEX NUTS

SizeWidth Across FlatsFinished Full NutsFinished Jam Nut
    Thickness Thickness
1/4 7/16 7/32 5/32
5/16 1/2 17/64 3/16
3/8 9/16 21/64 7/32
7/16 11/16 3/8 1/4
1/2 3/4 7/16 5/16
9/16 7/8 31/694 5/16
5/8 15/16 35/64 3/8
3/4 1 1/8 41/64 27/64
7/8 1 5/16 3/4 31/64
1 1 1/2 55/64 35/64
1 1/8 1 11/16 31/32 39/64
1 1/4 1 7/8 1 1/16 23/32
1 3/8 2 1/16 1 11/64 25/32
1 1/2 2 1/4 1 9/32 27/32
1 5/8 2 7/16 1 25/64 29/32
1 3/4 2 5/8 1 1/2 31/32
1 7/8 2 3/4 1 3/4 1 1/32
2 3 1 23/32 1 3/32
2 1/4 3 3/8 1 59/64 1 13/64
2 1/2 3 3/4 2 9/64 1 29/64
2 3/4 4 1/8 2 23/64 1 37/64
3 4 1/2 2 37/64 1 45/64

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BASIC DIMENSIONS FOR INCH SERIES HEX COUPLING NUTS

SizeFinish Hex Width Across FlatsFinished Hex Coupling NutHeavy Hex Width Across FlatsHeavy Hex Coupling Nut
    Thickness   Thickness
1/4 7/16 7/8 1/2 7/8
5/16 1/2 1 1/8 9/16 1 1/8
3/8 9/16 1 1/8 11/16 1 1/8
7/16 11/16 1 3/4 3/4 1 3/4
1/2 3/4 1 3/4 7/8 1 3/4
5/8 15/16 2 1/8 1 1/16 2 1/8
3/4 1 1/8 2 1/4 1 1/4 2 1/4
7/8 1 5/16 2 1/2 1 7/16 2 1/2
1 1 1/2 2 3/4 1 5/8 2 3/4
1 1/4 1 7/8 3 2 3
1 1/2 2 1/4 3 1/2 2 3/8 3 1/2

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BASIC DIMENSIONS FOR INCH SERIES HEAVY HEX NUTS

SizeWidth Across FlatsHeavy Hex NutsHeavy Jam Nut
    Thick-
ness
Thick-
ness
1/4 1/2 15/64 11/64
5/16 9/16 19/64 13/64
3/8 11/16 23/64 15/64
7/16 3/4 27/64 17/64
1/2 7/8 31/64 19/64
9/16 15/16 35/64 21/64
5/8 1 1/16 39/64 23/64
3/4 1 1/4 47/64 27/64
7/8 1 7/16 55/64 31/64
1 1 5/8 63/64 35/64
1 1/8 1 13/16 1 7/64 39/64
1 1/4 2 1 7/32 23/32
1 3/8 2 3/16 1 11/32 25/32
1 1/2 2 3/8 1 15/32 27/32
1 5/8 2 9/16 1 19/32 29/32
1 3/4 2 3/4 1 23/32 31/32
1 7/8 2 15/16 1 27/32 1 1/32
2 3 1/8 1 31/32 1 3/32
2 1/4 3 1/2 2 13/64 1 13/64
2 1/2 3 7/8 2 29/64 1 29/64
2 3/4 4 1/4 2 45/64 1 37/64
3 4 5/8 2 61/64 1 45/64

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BASIC DIMENSIONS NU (HEAVY) NYLON INSERT LOCK NUTS

SizeWidth Across FlatsNU Series ThicknessWrenching Height
1/4 1/2 0.390 0.290
5/16 9/16 0.453 0.335
3/8 11/16 0.562 0.392
7/16 3/4 0.609 0.464
1/2 7/8 0.718 0.544
9/16 15/16 0.812 0.655
5/8 1 1/16 0.874 0.677
3/4 1 1/4 1.015 0.790
7/8 1 7/16 1.140 0.883
1 1 5/8 1.312 1.000
1 1/8 1 13/16 1.469 1.096
1 1/4 2 1.672 1.250
1 3/8 2 3/16 1.828 1.370
1 1/2 2 3/8 2.023 1.413
1 5/8 2 9/16 2.165 1.670
1 3/4 2 3/4 2.344 1.830
1 7/8 2 15/16 2.375 1.850
2 3 1/8 2.437 1.750
2 1/4 3 1/2 2.844 2.063
2 1/2 3 7/8 3.172 2.475
2 3/4 4 1/4 3.156 2.350
3 4 5/8 3.704 2.750

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STANDARD THREAD PITCH

SizeCoarse Thread (UNC)Fine Thread (UNF)Fine Thread (UNF)
1/4 20 28  
5/16 18 24  
3/8 16 24  
7/16 14 20  
1/2 13 20  
9/16 12 18  
5/8 11 18  
3/4 10 16  
7/8 9 14  
1 8 14  
1 1/8 7 12 8
1 1/4 7 12 8
1 3/8 6 12 8
1 1/2 6 12 8
1 5/8 5 1/2 12 8
1 3/4 5 12 8
1 7/8 5 12 8
2 4 1/2 12 8
2 1/4 4 1/2 12 8
2 1/4 4 12 8
2 1/2 4 12 8
2 3/4 4 12 8
3 4 12 8

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BASIC DIMENSIONS NE (STANDARD) NYLON INSERT LOCK NUTS

SizeWidth Across FlatsNE Series ThicknessWrenching Height
1/4 7/16 0.482 0.225
5/16 1/2 0.552 0.250
3/8 9/16 0.622 0.335
7/16 11/16 0.698 0.324
1/2 3/4 0.837 0.464
9/16 7/8 0.978 0.469
5/8 15/16 1.051 0.593
3/4 1 1/8 1.191 0.742
7/8 1 5/16 1.403 0.790
1 1 1/2 1.615 0.825
1 1/8 1 11/16 1.826 0.930
1 1/4 1 7/8 2.038 1.125
1 3/8 2 1/16 2.232 1.282
1 1/2 2 1/4 2.440 1.313

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HEX NUTS - STRENGTH

INCH HEX NUTS

GradeHardnessProof Load Strength (psi)
GR 2 Rc 32 max None Specified
GR 5 Rc 32 max 120,000
GR 5 over 1" Rc 32 max 105,000
GR 8 up to 5/8" Rc 24/32 150,000
GR 8 up to 1" Rc 26/34 150,000
GR8 up to 1 1/2 Rc 26/36 150,000
GR 9 Rc 30/38 180,000

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HEAVY HEX NUTS

GradeHardnessProof Load Strength (psi)
A Rb 68/Rc 32 100,000
5 Rc 32 max 133,000
C Rb 78/Rc 38 144,000
GR 8 up to 5/8" Rc 24/32 165,000
GR 8 up to 1" Rc 26/34 165,000
GR 8 up to 1 1/2" Rc 26/36 165,000
2H up to 1 1/2" Rc 24/35 175,000
2H over 1 1/2" Rb 95/Rc 35 175000

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