Brand: NORD-LOCK
Nord-Lock wedge-locking washers are designed to prevent threaded fasteners from loosening. Each Nord-Lock consists of two washers with interlocking faces. The cam angle on the interlocking faces is greater than the thread pitch angle, effectively increasing the torque required to loosen the fastener. This version is made from corrosion-resistant 316L (EN 1.4404) stainless steel. Each is enough for one bolt.
The NLSS Series washers have a small OD that matches the head OD on standard socket-head cap screws ("Allen" screws). This allows their use in a recessed hole that is just large enough to accept the "Allen" head. Note that this size is not appropriate for use under a nut (use the larger OD Nord-Lock NLSS-SP Series under a nut or hex bolt head). Install a Nord-Lock in place of a flat washer (using a Nord-Lock with a flat washer will defeat the locking action).
| Nord-Lock NLSS Series Small OD Locking Washers for Socket-Head Cap Screws |
| Nominal Size | SAE Size | Metric Size | ID (inch) | ID (metric) | OD (inch) | OD (metric) | Thickness (inch) | Thickness (metric) | Part No. |
|---|
| M5 | #10 | M5 | 0.21" | 5.4mm | 0.35" | 9.0mm | 0.09" | 2.2mm | NLSS-M5 |
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| M6 | | M6 | 0.26" | 6.5mm | 0.43" | 10.8mm | 0.09" | 2.2mm | NLSS-M6 |
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| 1/4" | 1/4" | | 0.28" | 7.2mm | 0.45" | 11.5mm | 0.09" | 2.2mm | NLSS-.250 |
|---|
| M8 | 5/16" | M8 | 0.34" | 8.7mm | 0.53" | 13.5mm | 0.08" | 2.0mm | NLSS-M8 |
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| 3/8" | 3/8" | | 0.41" | 10.3mm | 0.65" | 16.6mm | 0.08" | 2.0mm | NLSS-.375 |
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| M10 | | M10 | 0.42" | 10.7mm | 0.65" | 16.6mm | 0.08" | 2.0mm | NLSS-M10 |
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| M11 | 7/16" | M11 | 0.45" | 11.4mm | 0.73" | 18.5mm | 0.09" | 2.2mm | NLSS-M11 |
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| M12 | | M12 | 0.51" | 13mm | 0.77" | 19.5mm | 0.08" | 2.0mm | NLSS-M12 |
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| 1/2" | 1/2" | | 0.53" | 13.5mm | 0.77" | 19.5mm | 0.08" | 2.0mm | NLSS-.500 |
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| M14 | 9/16" | M14 | 0.60" | 15.2mm | 0.91" | 23.0mm | 0.12" | 3.0mm | NLSS-M14 |
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| M16 | 5/8" | M16 | 0.67" | 17mm | 1.00" | 25.4mm | 0.12" | 3.0mm | NLSS-M16 |
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| M18 | | M18 | 0.77" | 19.5mm | 1.14" | 29mm | 0.13" | 3.2mm | NLSS-M18 |
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| 3/4" | 3/4" | | 0.79" | 20mm | 1.21" | 30.7mm | 0.13" | 3.2mm | NLSS-.750 |
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| M20 | | M20 | 0.84" | 21.4mm | 1.21" | 30.7mm | 0.12" | 3.0mm | NLSS-M20 |
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| M22 | 7/8" | M22 | 0.92" | 23.4mm | 1.36" | 34.5mm | 0.13" | 3.2mm | NLSS-M22 |
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| M24 | | M24 | 1.0" | 25.3mm | 1.54" | 39mm | 0.13" | 3.2mm | NLSS-M24 |
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| 1" | 1" | | 1.1" | 27.9mm | 1.54" | 39mm | 0.13" | 3.2mm | NLSS-1.00 |
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