Safety Backup Washers
The Safety Backup Washer are the ideal solution for counter-holding large bolted joints that are tightened with RAD Battery, electric, or pneumatic torque tools. This innovative washer prevents the bolt/nut from turning on the passive side during the tightening process.
Advantages
- Immediate, effective locking even at low preload forces.
- No additional counter-holding measures or second person required for bolted joint assembly.
- Ideal for installation in confined spaces.
- Tightening and loosening possible with access from only one side.
- Backup-washer for use with Reaction Lock Washer.
Design and function
The Safety Backup Washer is a single washer with wave- shaped locking ribs on both sides, which was specially designed for use with Reaction Lock Washers to prevent the passive side from rotating in through-bolt connections during torque tightening.
Due to the arrangement of the locking ribs and the wave- shaped design of the Safety Backup Washer, a positive friction/form fit is created even with low tightening forces.
The bolted joint is tightened from the active side. Additional locking with a wrench by a second person or with the help of special tools is unnecessary thanks to the use of the Safety Backup Washer therefore making it safer as well.
Technical data
- Material: 1.1191 (C45E) with black zinc flake coating (flZnnc).
- Hardness: 485±25 HV0,3.
- Corrosion resistance: min.1,000 h in NSS-test according to ISO 9227.
- Suitable for high-strength bolts and nuts up to strength class 12.9.
- Available dimensions: M16 - M48 (5/8“- 1 ¾“)
- Other sizes, materials and coatings available on request.
Product overview
| {"lang-en": "Prod.no.", "lang-nl": "Art.nr.", "lang-de": "Prod.nr", "lang-it": "N. Prod.", "lang-es": "Prod. n.º", "lang-fr": "N° de prod.", "lang-da": "Prod.nr.", "lang-tr": "Ürün no."} | {"lang-en": "Model", "lang-nl": "Model", "lang-de": "Modell", "lang-it": "Modello", "lang-es": "Modelo", "lang-fr": "Modèle", "lang-da": "Model", "lang-tr": "Model"} | {"lang-en": "Bolt diameter size", "lang-nl": "Boutdiameter maat", "lang-de": "Schraubendurchmessergröße", "lang-it": "Dimensione del diametro del bullone", "lang-es": "Tamaño del diámetro del perno", "lang-fr": "Taille du diamètre du boulon"} | {"lang-en": "Hex size", "lang-nl": "Sleutelwijdte maat", "lang-de": "Sechskantschlüsselweite", "lang-it": "Dimensione esagonale", "lang-es": "Tamaño hex", "lang-fr": "Dimension hexagonale", "lang-da": "Hex size", "lang-tr": "Altı köşe boyutu"} |
|---|---|---|---|
| 🠋 222640 | BUW M16 - A/F 24MM | M16 | 24MM |
| 🠋 222641 | BUW M18 - A/F 27MM | M18 | 27MM |
| 🠋 222642 | BUW M20 - A/F 30MM | M20 | 30MM |
| 🠋 222643 | BUW M24 - A/F 36MM | M24 | 36MM |
| 🠋 222644 | BUW M27 - A/F 41MM | M27 | 41MM |
| 🠋 222645 | BUW M30 - A/F 46MM | M30 | 46MM |
| 🠋 222646 | BUW M33 - A/F 50MM | M33 | 50MM |
| 🠋 222647 | BUW M36 - A/F 55MM | M36 | 55MM |
| 🠋 222648 | BUW M39 - A/F 60MM | M39 | 60MM |
| 🠋 222649 | BUW M42 - A/F 65MM | M42 | 65MM |
| 🠋 222650 | BUW M45 - A/F 70MM | M45 | 70MM |
| 🠋 222651 | BUW M48 - A/F 75MM | M48 | 75MM |
| {“lang-en”: “Prod.no.”, “lang-nl”: “Art.nr.”, “lang-de”: “Prod.nr”, “lang-it”: “N. Prod.”, “lang-es”: “Prod. n.º”, “lang-fr”: “N° de prod.”, “lang-da”: “Prod.nr.”, “lang-tr”: “Ürün no.”} | {“lang-en”: “Model”, “lang-nl”: “Model”, “lang-de”: “Modell”, “lang-it”: “Modello”, “lang-es”: “Modelo”, “lang-fr”: “Modèle”, “lang-da”: “Model”, “lang-tr”: “Model”} | {“lang-en”: “Bolt diameter size”, “lang-nl”: “Boutdiameter maat”, “lang-de”: “Schraubendurchmessergröße”, “lang-it”: “Dimensione del diametro del bullone”, “lang-es”: “Tamaño del diámetro del perno”, “lang-fr”: “Taille du diamètre du boulon”} | {“lang-en”: “Hex size”, “lang-nl”: “Sleutelwijdte maat”, “lang-de”: “Sechskantschlüsselweite”, “lang-it”: “Dimensione esagonale”, “lang-es”: “Tamaño hex”, “lang-fr”: “Dimension hexagonale”, “lang-da”: “Hex size”, “lang-tr”: “Altı köşe boyutu”} |
|---|---|---|---|
| 🠋 222640 | BUW M16 – A/F 24MM | M16 | 24MM |
| 🠋 222641 | BUW M18 – A/F 27MM | M18 | 27MM |
| 🠋 222642 | BUW M20 – A/F 30MM | M20 | 30MM |
| 🠋 222643 | BUW M24 – A/F 36MM | M24 | 36MM |
| 🠋 222644 | BUW M27 – A/F 41MM | M27 | 41MM |
| 🠋 222645 | BUW M30 – A/F 46MM | M30 | 46MM |
| 🠋 222646 | BUW M33 – A/F 50MM | M33 | 50MM |
| 🠋 222647 | BUW M36 – A/F 55MM | M36 | 55MM |
| 🠋 222648 | BUW M39 – A/F 60MM | M39 | 60MM |
| 🠋 222649 | BUW M42 – A/F 65MM | M42 | 65MM |
| 🠋 222650 | BUW M45 – A/F 70MM | M45 | 70MM |
| 🠋 222651 | BUW M48 – A/F 75MM | M48 | 75MM |
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