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Locking nut Preveling torque type nut U-NUT-U-NUT single side (1 type) double side (2 types)
Locking nut Preveling torque type nut U-NUT-U-NUT low form (3 types)
Locking nut Preveling torque type nut U-NUT-Small U-NUT
Locking nut Preveling torque type nut U-NUT-U-NUT with cap
Locking nut Preveling torque type nut U-NUT-Flange U-NUT
Locking nut Preveling torque type nut U-NUT-Flange U-NUT (stainless steel)
Locking nut Preveling torque type nut U-NUT-Weld U-NUT
Locking nut Preveling torque type nut U-NUT-Fuji Precision Co., Ltd.

Locking nut Preveling torque type nut U-NUT
Fuji Precision Co., Ltd.


About This Product

Standard U-nuts and locking nuts that have built up trust and a proven track record for more than 50 years since their birth.

■Features

・Exhibits stable loosening prevention function ・Prevents early falling off even if the axial force decreases ・Can be reused ・Easy to tighten, no need for skilled techniques or special tools ・Since it has a loosening effect on its own, parts management is easy and installation errors are prevented. - All-metal product with excellent heat and cold resistance

■Supported markets

·Two wheel vehicle ・Four wheels ・Specially equipped vehicles, construction machinery ・Agricultural equipment ・Transportation machine ・Railway ・Ship ·plant ・Machine tools ・Industrial equipment ・Electrical equipment ・Medical care, welfare ·infrastructure ・Civil engineering ・Architecture ・Play equipment

■Structure and action

・Industry's first "metal ring locking function" U-NUT is made up of two parts: the nut body and a friction ring (special spring).The friction ring is fixed to the top of the nut by caulking and is integrated. ・The forces (P) and (P') applied by the friction ring generate prevailing torque (friction torque) on the effective thread, which prevents free rotation.

■Steel friction ring

・60° 3-blade ring (~M6) ・90° 2-blade ring (M8~)

■Thread accuracy

JIS6H (2nd grade), old JIS2nd grade, JIS2B

■Size

・M3 to M115 *Pitch: Coarse thread/Fine thread ・W3/16-24~W2"-4.5 ・NC#10-24~NC1"1/2-6 ・NF#10-32~NF1"1/2-12 *Other special sizes

■Shape

Single-sided (1 type) nut, double-sided (2 types) nut, low type (3 types) nut, small nut, flange nut, nut with cap, weld nut *Other special shapes

■Material

SS400 or equivalent, S45C tempered or equivalent, SUS304 or equivalent, SCM435 (tempered), titanium, SUS316L, brass (brass/BSBM) *Other special materials

■Prevailing torque and reusability

Prevailing torque is the friction torque generated by the friction ring acting on the bolt thread. Even after using it for 10 cycles, there is only a slight decrease in the prevailing torque value, and it can be reused.

■Surface treatment

・Trivalent chromate ・Trivalent black chromate ・Trivalent Uniqlo ・Chromate ・Trivalent stainless steel coat ・Hot-dip galvanizing ・Hot-dip zinc aluminum alloy plating ・Black dyeing ・Lubrite ・Chrome ・Geomet® ・Disgo® Lintas ·nickel

  • Product

    Locking nut Preveling torque type nut U-NUT

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9 Models of Locking nut Preveling torque type nut U-NUT

Click on the part number for more information about each product

Image Part Number Price (excluding tax) Diagonal (e) min mm Diagonal (e) max mm Nominal diameter - number of threads Unit weight (g) Overall height (h) Tolerance mm Overall height (h) Standard dimensions mm Width across flats (s) min mm Width across flats (s) max. mm Width across flats (s) Standard dimension mm Friction ring material Nut body material Thread height (m) approx. mm Diagonal (e) approx. mm Width across flats (s) Tolerance mm Welding area outer width (S1) approx.mm Nominal diameter (d) mm Pitch (p)mm H2 tolerance mm H2 mm Seat diameter (φdc) Tolerance mm Seat diameter (φdc) Standard dimension mm Brim thickness (C) mm Strength classification Counterbore depth (b) approx.mm Counterbore diameter (φdb) Tolerance mm Counterbore diameter (φdb) Standard dimension mm Cap body material L (MIN) mm L (MAX) mm
Locking nut Preveling torque type nut U-NUT-Part Number-U-NUT single side (1 type) double side (2 types)

U-NUT single side (1 type) double side (2 types)

Available upon quote - - -

0.4~1,910

±0.3~±2

3.2~54

- -

5.5~95

SUS301

SS400,S45C (temperature),SUS304

2.7~50.0

6.4~110.0

0~0.55

-

M3~M64

0.5~6

- - - - - - - - - - - -
Locking nut Preveling torque type nut U-NUT-Part Number-U-NUT low form (3 types)

U-NUT low form (3 types)

Available upon quote - - -

0.6~176.0

±0.3~±0.8

3.1~21.0

- -

7~46

SUS301

SS400,S45C (temperature),SUS304

2.3~18.0

8.1~53.1

0~0.4

-

M4~M30

0.7~3.5

- - - - - - - - - - - -
Locking nut Preveling torque type nut U-NUT-Part Number-Small U-NUT

Small U-NUT

Available upon quote - - -

4.0~41.5

±0.4~±0.5

7.3~17.5

- -

12~27

SUS301

SS400,S45C (temperature),SUS304

6.2~16

13.9~31.2

0~0.35

-

M8~M20

1.25~2

- - - - - - - - - - - -
Locking nut Preveling torque type nut U-NUT-Part Number-U-NUT with cap

U-NUT with cap

Available upon quote - - -

0.9~66.0

±0.5~±2

7.2~31.0

- -

7.0~30.0

SUS301

SS400,SUS304

3.0~15.4

8.1~34.6

0~0.35

-

M4~M20

0.7~2.5

- - - - - - - - -

SPCC, SUS304

4.4~20.4

5.4~24.8

Locking nut Preveling torque type nut U-NUT-Part Number-Flange U-NUT

Flange U-NUT

Available upon quote - - -

1.3~41.7

±0.3~±0.5

5.0~18.0

- -

7~24

SUS301

SS400,S45C (temperature)

4.2~16.5

8.1~27.7

0~0.35

-

M4~M18

0.7~1.5

- -

0~±0.5

10~32

0.6~3.0

6T,8T

2~3

±0.3

13~20

- - -
Locking nut Preveling torque type nut U-NUT-Part Number-Flange U-NUT (stainless steel)

Flange U-NUT (stainless steel)

Available upon quote - - -

3.7~24.8

-

6.9~13.0

- -

10~19

SUS301

SUS304

6.0~11.5

11.5~21.9

0~0.35

-

M6~M12

1~1.75

- -

0~0.5

14.2~26.5

1.1~1.8

- - - - - - -
Locking nut Preveling torque type nut U-NUT-Part Number-Weld U-NUT

Weld U-NUT

Available upon quote - - -

1.2~13.6

±0.3~±0.4

3.0~10.5

- -

9~17

SUS301

SS400

2.3~9.2

-

0~0.43

9.7~19.2

M5~M12

0.8~1.25

0~0.2

1.0~1.2

- - - - - - - - - -
Locking nut Preveling torque type nut U-NUT-Part Number-Wit U-NUT

Wit U-NUT

Available upon quote - -

W3/16-24~W1"-8

-

±0.3~±0.6

4.1~22.5

- -

9~41

SUS301

SS400,S45C (temperature),SUS304

3.3~20.0

10.4~47.3

0~0.4

- - - - - - - - - - - - - - -
Locking nut Preveling torque type nut U-NUT-Part Number-Unify U-NUT

Unify U-NUT

Available upon quote

10.50~41.99

10.99~43.99

Coarse grain #10-24~1"-8
Fine #10-32~1"-14

1.5~125.3

±0.3~±0.8

3.9~24.2

9.20~36.83

9.52~38.10

95.2~38.10

SUS301

SS400,S45C (tempered),SUS304,SS400,S4SC (tempered),SUS304

3.2~21.7

- - - - - - - - - - - - - - - - -

Click on the part number for more information about each product

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