Hex nylon insert lock nuts, Stainless steel 18-8
Hex nylon insert lock nuts

Nut size (A.K.A. diameter) is the size bolt that the nut is used with. The same is true of the thread count. Thus a 1/4"-20 nut fits a 1/4"-20 bolt.

Note: Stainless lock nuts may require extra care during installation to avoid galling (seizing up). More info.

Nylon insert hex nut diameter

Resources

US Nut sizes

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Prod. # Diameter and Thread count Each price Bag price Bulk price Price Buy

Coarse (standard) thread
21145 4 #3-48 $0.08 / ea $5.69 / 100 $48.80 / 1000 $0.08 / ea $5.69 / 100 $48.80 / 1000
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4107 #4-40 $0.07 / ea $3.87 / 100 $32.30 / 1000 $0.07 / ea $3.87 / 100 $32.30 / 1000
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2550 #6-32 $0.08 / ea $5.23 / 100 $44.90 / 1000 $0.08 / ea $5.23 / 100 $44.90 / 1000
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2551 #8-32 $0.09 / ea $6.22 / 100 $53.50 / 1000 $0.09 / ea $6.22 / 100 $53.50 / 1000
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2552 #10-24 $0.12 / ea $7.28 / 100 $62.00 / 1000 $0.12 / ea $7.28 / 100 $62.00 / 1000
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2553 * #10-32 $0.11 / ea $6.60 / 100 $56.20 / 1000 $0.11 / ea $6.60 / 100 $56.20 / 1000
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5578 4 #12-24 $0.22 / ea $15.29 / 100 $132.00 / 1000 $0.22 / ea $15.29 / 100 $132.00 / 1000
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2554 1/4"-20 $0.15 / ea $10.06 / 100 $84.10 / 1000 $0.15 / ea $10.06 / 100 $84.10 / 1000
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2555 5/16"-18 $0.22 / ea $15.64 / 100 $134.00 / 1000 $0.22 / ea $15.64 / 100 $134.00 / 1000
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2556 3/8"-16 $0.32 / ea $12.72 / 50 $109.00 / 500 $0.32 / ea $12.72 / 50 $109.00 / 500
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4102 7/16"-14 $0.53 / ea $10.91 / 25 $93.60 / 250 $0.53 / ea $10.91 / 25 $93.60 / 250
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2557 1/2"-13 $0.63 / ea $13.19 / 25 $113.00 / 250 $0.63 / ea $13.19 / 25 $113.00 / 250
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18175 4 9/16"-12 $2.47 / ea $42.93 / 25 $371.00 / 250 $2.47 / ea $42.93 / 25 $371.00 / 250
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4103 5/8"-11 $1.43 / ea $29.63 / 25 $254.00 / 250 $1.43 / ea $29.63 / 25 $254.00 / 250
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4104 3/4"-10 $2.38 / ea $48.93 / 25 $423.00 / 250 $2.38 / ea $48.93 / 25 $423.00 / 250
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4105 7/8"-9 $6.68 / ea $138.99 / 25 $1,202.00 / 250 $6.68 / ea $138.99 / 25 $1,202.00 / 250
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4106 1"-8 $7.21 / ea $149.20 / 25 $1,291.00 / 250 $7.21 / ea $149.20 / 25 $1,291.00 / 250
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Fine thread
2553 #10-32 $0.11 / ea $6.60 / 100 $56.20 / 1000 $0.11 / ea $6.60 / 100 $56.20 / 1000
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4108 1/4"-28 $0.17 / ea $11.27 / 100 $96.70 / 1000 $0.17 / ea $11.27 / 100 $96.70 / 1000
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4109 5/16"-24 $0.24 / ea $16.09 / 100 $138.00 / 1000 $0.24 / ea $16.09 / 100 $138.00 / 1000
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4110 3/8"-24 $0.34 / ea $13.56 / 50 $116.00 / 500 $0.34 / ea $13.56 / 50 $116.00 / 500
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4111 7/16"-20 $0.66 / ea $13.25 / 25 $114.00 / 250 $0.66 / ea $13.25 / 25 $114.00 / 250
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4112 1/2"-20 $0.87 / ea $18.52 / 25 $159.00 / 250 $0.87 / ea $18.52 / 25 $159.00 / 250
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4113 5/8"-18 $1.79 / ea $36.00 / 25 $309.00 / 250 $1.79 / ea $36.00 / 25 $309.00 / 250
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4114 3/4"-16 $2.80 / ea $58.19 / 25 $500.00 / 250 $2.80 / ea $58.19 / 25 $500.00 / 250
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4 This item is a semi-standard size and is therefore more expensive.

* 10-32 is a fine thread, but it is listed under coarse thread because it is very common.

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Related Products
Anti-seize

Anti-seize

Thread locker prevents fasteners from loosening after installation. Anti-seize helps prevent seizing (galling) during installation.

See also
Hex nylon insert lock nuts

Metric hex nylon insert lock nuts

A hex nut with a nylon ring to resist loosening.