Nord-Lock Group Über Nord-Lock Nord-Lock Original Washers | Product information

Nord-Lock Keilsicherungsscheiben aus Stahl
Anwendungen Allgemeine Stahlanwendung
Werkstoffnummer EN 1.7182
Abmessungen M3 - M130
#5 bis 5"
Korrosionsbeständigkeit Minimum 1,000 hours in salt spray test (according to ISO 9227)
Bearbeitung Durchgehärtet
Härte* ≥ 465HV1
Coating Delta Protekt® KL100 zinc flake coating
Schraubengüte Bis zu 12.9
Temperaturbereich*** -50°C bis 200°C
Produktbezeichnung NL
NLsp
Lasermarkierung
Typenschlüssel		 flZn

* Die Härte der Keilsicherungsscheibe muss größer sein als die Härte der Gegenauflage, um ihre Funktion zu gewährleisten.

*** Die Temperaturempfehlungen basieren auf Informationen des Rohstofflieferanten und der Materialprüfungen. Die Sicherungsfunktion ist innerhalb des angegebenen Bereichs nicht beeinträchtigt.

Nord-Lock Keilsicherungsscheiben aus Edelstahl
Anwendungen Allgemeine Edelstahlanwendungen
Werkstoffnummer EN 1.4404
Abmessungen M3 - M80 
#5 bis 3 1/8"
Korrosionsbeständigkeit PREN 27**
Bearbeitung Oberflächengehärtet
Härte* ≥ 520HV0,05
Schraubengüte Bis zu A4-80
Temperaturbereich*** -160°C bis 500°C
Produktbezeichnung NLss
NLspss
Lasermarkierung
Typenschlüssel		 SS

* Die Härte der Keilsicherungsscheibe muss größer sein als die Härte der Gegenauflage, um ihre Funktion zu gewährleisten.

** Die Korrosionsbeständigkeit wird als PREN bezeichnet. PREN, oder Pitting Resistance Equivalent Number, ist eine theoretische Zahl, die aus der chemischen Zusammensetzung des Rohmaterials berechnet wird. Die Formel lautet: PREN = %Cr + 3,3x%Mo + 16x%N.


*** Die Temperaturempfehlungen basieren auf Informationen des Rohstofflieferanten und der Materialprüfungen. Die Sicherungsfunktion ist innerhalb des angegebenen Bereichs nicht beeinträchtigt.

NORD-LOCK 254 SMO® WASHERS
Applications Corrosive environment – chloride rich environments, offshore, pumps, heat exchangers, nuclear, food, medical, processing
Material standard EN 1.4547
Size range M3-M39
#5 to 1 1/2"
Corrosion resistance PREN 45**
Hardening Surface hardened
Washer hardness* ≥ 600HV0,05
Temperature range*** -160°C to 500°C
Product designation NLss-254
NLspss-254
Laser marking type code 254

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

 

Nord-Lock Alloy C-276 Washers
Applications Acidic environment – chemical industry, evaporators, offshore, downhole tooling
Material standard EN 2.4819 or equivalent
Size range M4-M20
#8 to 1 1/2"
Corrosion resistance PREN 68**
Hardening Surface hardened
Washer hardness* ≥ 520HV0,05
Temperature range*** -160°C to 500°C
Product designation NLss-276
NLspss-276
Laser marking type code 276

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

Nord-Lock Alloy 718 Washers
Applications High temperatures – gas turbines, turbo charges, incinerators
Material standard EN 2.4668 or equivalent
Size range M4-M20
#5 to 1 1/2"
Corrosion resistance PREN 29**
Hardening Surface hardened
Washer hardness* ≥ 620HV0,05
Temperature range*** -160°C to 700°C
Product designation NLss-718
NLspss-718
Laser marking type code 718

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

All types of Nord-Lock washers
Material type
Steel Stainless
steel (ss)		 254 SMO® ALLOY 
C-276		 ALLOY
718
Applications
General steel applications General stainless steel applications Corrosive environment – chloride rich environments, offshore, pumps, heat exchangers, nuclear, food, medical, processing Acidic environment – chemical industry, evaporators, offshore, downhole tooling High temperatures – gas turbines, turbo charges, incinerators
Material standard
EN 1.7182 EN 1.4404 EN 1.4547 EN 2.4819 or equivalent EN 2.4668 or equivalent
Size range

M3-M130

#5 to 5"

M3-M80

#5 to 3 1/8"

M3-M39

#5 to 1 1/2"

M4-M20

#8 to 1 1/2"

M4-M20

#5 to 1 1/2"
Corrosion resistance
Minimum 1,000 hours in salt spray test (according to ISO 9227) PREN 27** PREN 45** PREN 68** PREN 29**
Hardening
Through hardened Surface hardened Surface hardened Surface hardened Surface hardened
Washer hardness*
≥ 465HV1 ≥ 520HV0,05 ≥ 600HV0,05 ≥ 520HV0,05 ≥ 620HV0,05
Coating
Delta Protekt® KL100 zinc flake coating - - - -
Bolt grades
Up to 12.9 Up to A4-80 Up to A4-80 Up to A4-80 Up to A4-80
Temperature range***
-50°C to 200°C -160°C to 500°C -160°C to 500°C -160°C to 500°C -160°C to 700°C
Product designation
NL
NLsp		 NLss
NLspss		 NLss-254
NLspss-254		 NLss-276
NLspss-276		 NLss-718
NLspss-718
Laser marking type code
flZn SS 254 276 718

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

Selection guide

Application parameter
Steel Stainless
steel (ss)		 254 SMO® ALLOY 
C-276		 ALLOY
718
Steel type
EN 1.7182 EN 1.4404 EN 1.4547 EN 2.4819 or equivalent EN 2.4668 or equivalent
Examples of applications
General steel applications General stainless steel applications. Non chlorine / acid environments General salt water applications, pumps, chloride applications, heat exchangers, nuclear, desalination, food processing & medical equipment General acidic environments, process and chemical industry, evaporators, offshore downhole tooling Applications with high temperatures, gas turbines, turbo charges, incinerators
Available for bolt sizes

M3-M130

#5 to 5"

M3-M80

#5 to 3 1/8"

M3-M39

#5 to 1 1/2"

M3-M39 available on request

#5 to 1 1/2" available on request

M3-M39 available on request

#5 to 1 1/2" available on request
Washer types

Regular outer diameter (NL3 - NL130)

Enlarged outer diameter (NL3,5sp - NL36sp)

Regular outer diameter (NL3ss-NL80ss)

Enlarged outer diameter (NL3,5spss - NL30spss)

Regular outer diameter (NL3ss-254 - NL39ss-254)

Enlarged outer diameter (NL3,5spss-254 - NL27spss-254)

Regular outer diameter (NL3ss-276 - NL39ss-276)

Enlarged outer diameter (NL3,5spss-276 - NL27spss-276)

Regular outer diameter (NL3ss-718 - NL39ss-718)

Enlarged outer diameter (NL3,5spss-718 - NL27spss-718)
Treatment surface coating
Through hardened Delta Protekt® base coat (KL100) and top coat (VH302GZ) Surface hardened Surface hardened Surface hardened Surface hardened
Washer hardness*
≥ 465HV1 ≥ 520HV0,05 ≥ 600HV0,05 ≥ 520HV0,05 ≥ 620HV0,05
Corrosion resistance
Minimum 1,000 hours in salt spray test (according to IS09227) PREN 27** PREN 45** PREN 68** PREN 29**
Bolt grades
Up to 12.9 Up to A4-80      
Temperature range***
-50°C to 200°C -160°C to 500°C -160°C to 500°C -160°C to 500°C -160°C to 700°C

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

Hardness Conversion Table

Vickers
HV		 Brinell
HB		 Rockwell HRC Rockwell HRA 8.8
bolt		 10.9 bolt 12.9 bolt
300 285 29,8 65,5 |    
310 295 31,0 65,8 |    
320 304 32,2 66,4 | 320 HV  
330 314 33,3 67,0 | |  
335 319 33,9 67,3 335 HV |  
340 325 34,4 67,6   |  
350 333 35,5 68,1   |  
360 342 36,6 68,7   |  
370 352 37,7 69,2   |  
380 361 38,8 69,8   380 HV  
385 366 39,3 70,1     385 HV
390 371 39,8 70,3     |
400 380 40,8 70,8     |
410 390 41,8 71,4     |
420 399 42,7 71,8     |
430 409 43,6 72,3     |
435 414 44,1 72,5     435 HV
440 418 44,5 72,8      
460 437 46,1 73,6      
480 (456) 47,7 74,5      
500 (475) 49,1 75,3      
520 (494) 50,5 76,1      
540 (513) 51,7 76,7      

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