Nord-Lock Original Washers
Nord-Lock Original Washers
Nord-Lock Steel Washers |
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| Applications | General steel applications | |||
| Material standard | EN 1.7182 | |||
| Size range | M3-M130 #5 to 5" |
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| Corrosion resistance | Minimum 1,000 hours in salt spray test (according to ISO 9227) | |||
| Hardening | Through hardened | |||
| Washer hardness* | ≥ 465HV1 | |||
| Coating | Delta Protekt® KL100 zinc flake coating | |||
| Bolt grades | Up to 12.9 | |||
| Temperature range*** | -50°C to 200°C | |||
| Product designation | NL NLsp |
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| Laser marking type code | flZn | |||
* Washer hardness must be greater than the hardness of the mating surfaces in order to assure its mechanical function.
*** Temperature recommendations are based on information from the raw material supplier and testing. The locking function is not affected within the specified range.
Nord-Lock Stainless Steel Washers |
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| Applications | General stainless steel applications | |||
| Material standard | EN 1.4404 | |||
| Size range | M3-M80 #5 to 3 1/8" |
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| Corrosion resistance | PREN 27** | |||
| Hardening | Surface hardened | |||
| Washer hardness* | ≥ 520HV0,05 | |||
| Bolt grades | Up to A4-80 | |||
| Temperature range*** | -160°C to 500°C | |||
| Product designation | NLss NLspss |
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| Laser marking type code | SS | |||
* 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 254 SMO® Washers |
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| 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" |
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| Corrosion resistance | PREN 45** | |||
| Hardening | Surface hardened | |||
| Washer hardness* | ≥ 600HV0,05 | |||
| Temperature range*** | -160°C to 500°C | |||
| Product designation | NLss-254 NLspss-254 |
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| 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 |
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| 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" |
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| Corrosion resistance | PREN 68** | |||
| Hardening | Surface hardened | |||
| Washer hardness* | ≥ 520HV0,05 | |||
| Temperature range*** | -160°C to 500°C | |||
| Product designation | NLss-276 NLspss-276 |
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| 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 |
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| Applications | High temperatures – gas turbines, turbo charges, incinerators | |||
| Material standard | EN 2.4668 or equivalent | |||
| Size range | M4-M20 #5 to 1 1/2" |
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| Corrosion resistance | PREN 29** | |||
| Hardening | Surface hardened | |||
| Washer hardness* | ≥ 620HV0,05 | |||
| Temperature range*** | -160°C to 700°C | |||
| Product designation | NLss-718 NLspss-718 |
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| 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 |
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| 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.
材質別仕様比較
| 項目 | ||||
| 鉄（鋼）材 | ステンレス | 高耐食性ステンレス：254 SMO® | ALLOY C-276 |
ALLOY 718 |
| 鉄製 | ||||
| EN 1.7182 | EN 1.4404 | EN 1.4547 | EN 2.4819 あるいは相当品 | EN 2.4668 あるいは相当品 |
| 適用例 | ||||
| スチール全般 | ステンレス全般、非塩化物／非酸性環境 | 海水・塩害環境、食品・化粧品・医薬品工場、化学プラント、オフショア・港湾設備等 | 一般的な酸環境下、化学加工産業、蒸発器、遠洋掘削機等 | 高温環境下、ガスタービン、過給器、焼却炉等 |
| 適用ボルトサイズ | ||||
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M3-M130 #5 - 5" |
M3-M80 #5 - 3 1/8" |
M3-M39 #5 - 1 1/2" |
M3-M39 別作にて対応 #5 - 1 1/2" 別作にて対応 |
M3-M39 別作にて対応 #5 - 1 1/2" 別作にて対応 |
| ワッシャータイプ | ||||
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標準外径タイプ(NL3 - NL130) 幅広外径タイプ(NL3,5sp - NL36sp) |
標準タイプ(NL3ss - NL80ss) 幅広タイプ(NL3,5spss - NL30spss) |
標準タイプ(NL3ss-254 - NL39ss-254) 幅広タイプ(NL3,5spss-254 - NL27spss-254) |
標準タイプ(NL3ss-276 - NL39ss-276) 幅広タイプ(NL3,5spss-276 - NL27spss-276) |
標準タイプ(NL3ss-718 - NL39ss-718) 幅広タイプ(NL3,5spss-718 - NL27spss-718) |
| 焼入れ・表面処理 | ||||
| 全体焼入れ - デルタプロテクトのベースコート（KL100）およびトップコート（VH302GZ） | 表面焼き入れ | 表面焼き入れ | 表面焼き入れ | 表面焼き入れ |
| ワッシャー硬度※ | ||||
| ≥ 465HV1 | ≥ 520HV0,05 | ≥ 600HV0,05 | ≥ 520HV0,05 | ≥ 620HV0,05 |
| 耐腐食性 | ||||
| 塩水噴霧試験（ISO9227による）で1,000時間以上 | PREN 値 27※ | PREN 値 45※ | PREN 値 68※ | PREN 値 29※ |
| 対応ボルト強度 | ||||
| 12.9まで | A4-80まで | |||
| 温度範囲※ | ||||
| -50°C ~ 200°C | -160°C ~ 500°C | -160°C ~ 500°C | -160°C ~ 500°C | -160°C ~ 700°C |
※相手材の硬度がノルトロックワッシャーより高い場合は、ノルトロックのウェッジロッキング機構による緩み止め機能は発揮されません。
※PREN値（耐孔食係数）= %Cr + 3,3x%Mo + 16x%N. 表中の値は素材のものを表します。
※温度の推奨値は原材料メーカーからの情報によります。仕様内ではロック機能に影響はありません。
注）：ノルトロックステンレスワッシャーは、プレス成型・焼入れ工程において、表面層のみ本来の材料EN 1.4404（AISI 316L）よりも耐食性が落ちる場合があります。僅かな錆の発生も懸念される箇所へのご使用を検討されるお客様は、ノルトロック254SMO®ワッシャーの使用をご推奨いたします。
ノルトロックワッシャーの材質・タイプ
ノルトロックワッシャー独自のウェッジロック機能を確実にするため、相手材の表面硬度はノルトロックの硬度を超えないようにして下さい。
| ワッシャーのタイプ | 範囲 | 硬度 亜鉛フレークコーティングあり flZnnc–600 | 硬度 コーティングなし |
| 鉄製ワッシャー (全体焼入れ) | NL3 - NL42 NL45 - NL130 |
≥ 465 HV1 ≥ 465 HV1 |
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| ステンレスワッシャー (表面焼入れ) | NL3ss - NL80ss | ≥ 520 HV0.05 | |
| 254SMO® ワッシャー | NL3ss-254 – NL80ss-254 | ≥ 600 HV0.05 |
硬度換算表
| HV ビッカース硬さ | HB ブリネル硬さ | HRC ロックウェル硬さ | HRA | 強度区分8.8 | 強度区分10.9 | 強度区分12.9 |
| 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 |
