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Unified Thread Type U-NUT

60° thread angle　Compatible with US, UK, and Canadian standards

FUJILOK U-NUT
Dimensional Charts and Tightening Torque Charts
  • Single Chamfer (Type 1) & Double Chamfer (Type 2) U-NUT
  • Thin Type (Type 3) U-NUT
  • Small Type U-NUT
  • Cap Type U-NUT
  • Flange Type U-NUT
  • Flange Type U-NUT (Stainless Steel)
  • Weld Type U-NUT
  • Whitworth Thread Type U-NUT
  • Unified Thread Type U-NUT

Features

  • 60° thread angle
  • Compatible with US, UK and Canadian standards for aircraft and US automobiles

General names

Inch screw, Bu (old Japanese unit of measurement) screw

Video of features

Dimensional Charts

Unified Thread Type U-NUT Dimensional Chart

●Available
Thread Accuracy:JIS2B　Unit:mm

Material of the Nut Body SS400 S45C
(thermal refined)		 SUS304 SS400 S45C
(thermal refined)		 SUS304 Unit
Weight
(g)
Approx.
Material of the Friction Ring SUS301
Nominal
Diameter
- Number
of threads		 Width
Across
Flat
(s)		 Across
orners
(e)		 Overall
Height
(h)		 Thread
Height
(m)
Approx.		 UNC UNF
Coarse
(UNC)		 Fine
(UNF)		 Base Max. Min. Max. Min. Base Tolerance Double
Chamfer
(Type 2)		 Double
Chamfer
(Type 2)		 Double
Chamfer
(Type 2)		 Double
Chamfer
(Type 2)		 Double
Chamfer
(Type 2)		 Double
Chamfer
(Type 2)
#10-24 #10-32 9.52 9.52 9.20 10.99 10.50 3.9 ±0.3 3.2 ● 　 ● ● 　 ● 1.5
1/4-20 1/4-28 11.11 11.11 10.88 12.82 12.40 6.6 5.6 ● 　 ● ● 　 ● 3.4
5/16-18 5/16-24 12.70 12.70 12.43 14.65 14.15 7.8 ±0.4 6.8 ● 　 ● ● ● ● 5.2
3/8-16 3/8-24 14.28 14.28 14.00 16.51 15.96 9.5 8.3 ● ● ● ● ● ● 7.5
7/16-14 7/16-20 17.46 17.46 17.15 20.16 19.51 10.9 9.5 ● 　 ● ● ● ● 12.7
1/2-13 1/2-20 19.05 19.05 18.70 21.99 21.34 12.6 11.1 ● ● ● ● ● ● 18.1
5/8-11 5/8-18 23.81 23.81 23.42 27.50 26.70 15.6 ±0.6 13.9 ● ● ● ● ● ● 35.9
3/4-10 3/4-16 28.57 28.57 27.64 32.99 31.50 18.1 16.3 ● ● ● ● ● ● 56.1
7/8-9 7/8-14 33.33 33.33 32.24 38.50 36.76 21.6 ±0.8 19.1 ● ● ● ● 　 　 87.8
1"-8 1"-14 38.10 38.10 36.83 43.99 41.99 24.2 21.7 ● ● 　 ● 　 　 125.3
*Please contact us for the presence or absence of a left-hand thread.
*Please check the stock condition of each size.
*The material also includes items with equivalent materials.
*Dimensions may change for improvement.
Please feel free to contact us for sizes, shapes, and materials that are not listed.

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    • FUJILOK U-NUT
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Market Examples

  • Two-wheeled
    vehicles
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    vehicles
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    vehicles
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    equipment
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  • Railways
  • Marine
    vessels
  • Plants
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    tools
  • Industrial
    equipment
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    welfare
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    engineering
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    equipment

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