Description
Anti-Chafe U-Bolts – With a Thin Silicone Rubber Sleeve
Includes two nuts per leg
U-bolts have a silicone rubber sleeve to help protect the supported element from chafing against the bare metal of the u-bolt.
Although these are manufactured as an extended leg, non-grip u-bolt for BS3974 Pipe, they will of course have many other uses. Just check the full dimensions below to ensure they match your needs
U-Bolt Measurements (mm):
| Size (Pipe NB) | Pipe OD | U-Bolt Inside Diameter | U-Bolt Inside Height | Thread Size | Thread Length | Leg Centers | U-Bolt Straight Leg Length | Sleeve Thickness* |
| 15 | 21.3 | 24 | 77 | M6 | 60 | 30 | 65 | 1 |
| 20 | 26.9 | 29 | 82 | M6 | 60 | 35 | 67 | 1 |
| 25 | 33.7 | 36 | 88 | M6 | 65 | 42 | 70 | 1 |
| 32 | 42.4 | 44 | 96 | M10 | 65 | 54 | 74 | 1 |
| 40 | 48.3 | 52 | 104 | M10 | 65 | 62 | 78 | 1 |
| 50 | 60.3 | 64 | 116 | M10 | 65 | 74 | 84 | 1 |
| 65 | 76.1 | 78 | 131 | M12 | 80 | 90 | 92 | 1.5 |
| 80 | 88.9 | 94 | 147 | M12 | 80 | 106 | 100 | 1.5 |
| 100 | 114.3 | 116 | 172 | M12 | 80 | 128 | 114 | 1.5 |
| 125 | 139.7 | 143 | 200 | M12 | 80 | 155 | 128 | 1.5 |
| 150 | 168.3 | 173 | 240 | M16 | 100 | 189 | 154 | 1.5 |
| 200 | 219.1 | 222 | 287 | M16 | 100 | 238 | 176 | 1.5 |
| 250 | 273 | 276 | 351 | M20 | 110 | 296 | 213 | 1.5 |
| 300 | 323.9 | 328 | 410 | M20 | 110 | 348 | 246 | 1.5 |
*The sleeve comes down to the beginning of the threaded section
Our manufacturing tolerances are + / – 1 mm)
We use roll threading so the diameter of the bar is usually less than the thread size.
U-Bolt Base Material:
A4 (T316) Marine grade stainless steel has a greater corrosion resistance than A2 in certain environments. It is often used for Marine applications especially when coming into direct contact with saltwater.
A2 (T304) stainless steel has good resistance to corrosion except in severe industrial and Marine Condition. Use A4 in a marine environment.
BZP – Bright Zinc Plated Steel – A 3-micron plating is applied to the steel to give a shiny finish. Although it does afford some protection this is best suited to indoor use.
Galvanised Steel – A duller finish than BZP, typically 50 microns thick covering of Zinc and therefore provides much more protection suitable for many outdoor applications. To allow for this layer you should use tapped oversized nuts
Silicone Rubber Specifications:
Platinum Silicone Rubber
SHORE A – DIN 53 505 – 60
N/mm2 – DIN 53 504 S2 – 10
ELONGATION % – DIN 53 504 S2 – 50
TEAR B N/mm – ASTM D 624 die B – 33
Density g/cm3 – DIN 53 479 A – 1.16
Data above is only to be used as a guide
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