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Serrated Conical Spring Washers NF E25-511

Serrated Conical Spring Washers NF E25-511 Featured Image
  • Serrated Conical Spring Washers NF E25-511
  • Serrated Conical Spring Washers NF E25-511
  • Serrated Conical Spring Washers NF E25-511
  • Serrated Conical Spring Washers NF E25-511
  • Serrated Conical Spring Washers NF E25-511

Short Description:

Serrated conical spring washers NF E25-511 are Conical shaped lock washers, formed with a ribbed top surface. It is also called Conical contact washers, Conical knurled spring washers, or Locking disc washers. The conical shape exerts locking force 360° around the underside of the screw head or nut. The ribbed top surface further enhances the locking force and resists the torque fastener connection potential for loosening under pressure and vibration.


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► Serrated Conical Spring Washers NF E 25-511 Overview

● Serrated Conical Spring Washers NF E25-511 Introduction ● Serrated Conical Spring Washers NF E25-511 Dimensions
● Serrated Conical Spring Washers NF E25-511 Materials ● Serrated Conical Spring Washers NF E25-511 Surface treatments
● Serrated Conical Spring Washers NF E25-511 Applications

► Serrated Conical Spring Washers NF E 25-511 Introduction

The contact washers are made from high carbon spring steel or stainless steel. They are manufactured in a variety of ID, OD and thickness combinations to suit various applications. The contact washers are produced in accordance with French National Standard NF E25-511. It can be ordered with either a plain smooth bearing surface or with barbs for grounding purposes when mounting surfaces are painted or coated. The Contact Washers with barbs are also named Grounding Washers.

NFE 25-511 A2, A4
NFE 25-511 SS304
NFE25-511 Zinc
NFE25-511 ZY

► Serrated Conical Spring Washers NF E 25-511 Dimensions

NFE25-511
Serrated Conical Spring Washers NF E 25-511
M Type d1 d2 s h No of
serrations 		 d3 d4 Weight/M
min tol. nom tol. nom tol. min max min min max
(mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (kgs)
3 N 3.1  ﹢0.25 6  ± 0.24 0.5  ± 0.03 0.70  0.90  28 5.5  3.6  4.1  0.08 
3 M 3.1 ﹢0.25 8  ± 0.29 0.6  ± 0.03 0.80  1.00  28 5.5  3.6  4.1  0.20 
3 L 3.1 ﹢0.25 10  ± 0.29 0.6  ± 0.03 0.95  1.20  28 5.5  3.6  4.1  0.33 
4 N 4.1  ﹢0.30 8  ± 0.29 0.8  ± 0.03 1.00  1.20  32 7  4.7  5.2  0.23 
4 M 4.1  ﹢0.30 10  ± 0.29 0.9  ± 0.04 1.15  1.40  32 7  4.7  5.2  0.46 
4 L 4.1  ﹢0.30 14  ± 0.35 1.0  ± 0.04 1.40  1.80  32 7  4.7  5.2  1.10 
5 N 5.1  ﹢0.30 10  ± 0.29 1.0  ± 0.04 1.25  1.50  36 8  5.7  6.2  0.46 
5 M 5.1 ﹢0.30 12  ± 0.35 1.1  ± 0.04 1.45  1.80  36 8  5.7  6.2  0.80 
5 L 5.1 ﹢0.30 16  ± 0.35 1.2  ± 0.04 1.70  2.10  36 8  5.7  6.2  1.70 
6 N 6.1  ﹢0.30 12  ± 0.35 1.2  ± 0.04 1.55  1.85  45  10  6.8  7.4  0.79 
6 M 6.1  ﹢0.30 14  ± 0.35 1.3  ± 0.04 1.75  2.10  45  10  6.8  7.4  1.27 
6 L 6.1  ﹢0.30 18  ± 0.35 1.4  ± 0.04 2.10  2.50  45  10  6.8  7.4  2.48 
8 N 8.2  ﹢0.36 16  ± 0.35 1.4  ± 0.04 1.80  2.20  45  13  9.2  9.8  1.63 
8 M 8.2 ﹢0.36 18  ± 0.35 1.4  ± 0.04 1.90  2.35  45  13  9.2  9.8  2.22 
8 L 8.2 ﹢0.36 22  ± 0.42 1.6  ± 0.05 2.20  2.70  45  13  9.2  9.8  4.11 
10 N 10.2  ﹢0.36 20  ± 0.42 1.6  ± 0.05 2.10  2.60  45  16  11.2  11.9  2.90 
10 M 10.2 ﹢0.36 22  ± 0.42 1.6  ± 0.05 2.25  2.75  45  16  11.2  11.9  3.75 
10 L 10.2 ﹢0.36 27  ± 0.42 1.8  ± 0.05 2.60  3.10  45  16  11.2  11.9  6.90 
12 N 12.4  ﹢0.43 24  ± 0.42 1.8  ± 0.05 2.40  2.90  45  18  13.7  14.4  4.69 
12 M 12.4 ﹢0.43 27  ± 0.42 1.8  ± 0.05 2.60  3.10  45  18  13.7  14.4  6.34 
12 L 12.4 ﹢0.43 32  ± 0.50 2.0  ± 0.05 3.10  3.60  45  18  13.7  14.4  10.65 
14 M 14.4  ﹢0.43 30  ± 0.42 2.4  ± 0.06 3.20  3.70  45  21  15.7  16.4  10.18 
16 M 16.4  ﹢0.43 32  ± 0.50 2.8  ± 0.06 3.60  4.10   45  24  17.7  18.4  12.95 
20 M 20.5  ﹢0.52 40  ± 0.50 3.2  ± 0.06 4.30  4.90   45  30  23.1  22.8  23.12 
Conical Serpentine Washers Plain1-3

Contact washer according to NF E 25-511 N standard. To be used with cylindrical screw head of resistance class ≤ 8.8 and applications with counter bores.

Conical Serpentine Washers Plain1-1

Contact washer according to NF E 25-511 M standard. To be used with hexagonal screw heads of resistance class 8.8 and 10.9.

Conical Serpentine Washers Plain1-2

Contact washer according to NF E 25-511 L standard. To be used with oval bores and 'soft' underlying surfaces (aluminum, plastic materials, etc.) with screws of resistane classes 8.8 and 10.9.

► Serrated Conical Spring Washers NF E 25-511 Materials

Materials Product Instructions
Spring steel: 65Mn ≤200°C, used in a regular environment.
Stainless steel: SUS304, SUS316(A2, A4) ≤300°C, used in corrosive environment.
Customized. Any technical questions, please contact us at info@techstamping.com

► Serrated Conical Spring Washers NF E 25-511 Surface Treatments

Surface Treatments
● Zinc Cr+3 ● Mechanical Zinc Cr+3 ● Mechanical Zinc Yellow Cr+3
● Geomet ● Dacromet ● Stainless steel polishing
● Black oxide ● Customized  

► Serrated Conical Spring Washers NF E 25-511 Applications

Applications
● Motors ● Safety assembling
● Transmissions ● Electro-mechanics
● Industry supplies ● Heavy - construction mechanics

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