Hex Coupling Nuts Distributor

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Heavy Hex Nuts Supplier

As a leading hex coupling nuts distributor, Bayou City Bolt has hex coupling nuts and heavy hex nuts in stock and ready to order. 

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

Size Width Across Flats Finished Full Nuts Finished 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

Size Finish Hex Width Across Flats Finished Hex Coupling Nut Heavy Hex Width Across Flats Heavy 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

Size Width Across Flats Heavy Hex Nuts Heavy 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

Size Width Across Flats NU Series Thickness Wrenching 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

Size Coarse 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

Size Width Across Flats NE Series Thickness Wrenching 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

Grade Hardness Proof 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

Grade Hardness Proof 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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We offer the lowest minimums in the industry, and sell by the piece or in
bulk - you buy only the fasteners you need!

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