# Nord-Lock wedge-locking washers NL3 to NL130: inner and outer diameter, thickness, enlarged-OD (sp) pairs, two tables compared

> What are the inner diameter, outer diameter and thickness of a Nord-Lock washer for an M6, M8, M10, M12, M16 or 1/2 in bolt?

- Category: Hardware › Fasteners
- Kind: Standard part
- Basis: Nord-Lock steel washer dimension tables from two distributors (Irontrade, TFC), checked against Nord-Lock's own product pages (NL3, NL1", NL1/2"sp); mm; 18 envelope files for the sizes where the two tables agree
- Page: https://xemstudio.com/objects/nord-lock-wedge-locking-washers/ · JSON: https://xemstudio.com/api/geometry?object=nord-lock-wedge-locking-washers · Plain text: https://xemstudio.com/objects/nord-lock-wedge-locking-washers/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 48.5 | 48.5 | 4.6 |

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- Nord-Lock washers are used as a pair: two washers with cam faces on one side and radial teeth on the other, so any thread movement has to ride up the cam and clamp harder. The tables give one Øi (inside), one Øo (outside) and one T per pair name (NL6 for M6, NL1/2" for 1/2 in). 'sp' is the enlarged-outer-diameter version at the same inside diameter (the maker: sp washers 'have the same inner diameter as the standard washers'). Standard sizes M3 to M42 and #5 to 1-1/2 in; sp sizes M3.5 to M36 and #6 to 1-3/8 in; NL45 to NL130 have no sp version in the tables.
- Where the two tables disagree (listed, and flagged per row): NL1/4 (T 1.8); NL30sp (Øo 58.5, T 6.6); NL33sp (T 6.6); NL36 (T 6.6); NL39 (T 6.6); NL42 (T 6.6). Nord-Lock's own pages match the Irontrade table wherever they were read (NL3 3.4 / 7 / 1.8, NL1" 27.9 / 39 / 3.4, NL1/2"sp 13.5 / 25.4 / 3.4). Neither source says whether T is the thickness of the pair or of one washer. The files and rows use the Irontrade numbers, and only the 18 sizes where both tables agree are drawn.
- Material (Nord-Lock NL3 page): steel EN 1.7182, hardness 465 HV1 or more, zinc flake coating (Delta Protekt), temperature -50 to 200 °C. Tolerances (Irontrade): Øi ±0.1 to ±0.5 mm depending on size, Øo ±0.2 to +0 / -2.0 mm, T ±0.25 mm (NL3 to NL42) and ±0.75 mm (NL45 to NL130). Stainless and other grades are separate Nord-Lock products not tabled here.
- Files: plain annuli at Øi, Øo and T, one per pair (a pair is drawn as one ring; the cam faces and teeth are not drawn). NL3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24 and the enlarged versions NL8sp, 10sp, 12sp, 16sp, 20sp, 24sp. Pair the washers cam face to cam face, bolt-side teeth against the bolt head and the joint (Nord-Lock's own instructions apply).

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| bore (Øi) | NL3 Ø3.4, NL4 4.4, NL5 5.4, NL6 6.5, NL8 8.7, NL10 10.7, NL12 13.0, NL14 15.2, NL16 17.0, NL18 19.5, NL20 21.4, NL24 25.3 mm | bolt or screw of the named size (M3 to M24); the bore is a clearance bore like the flat washer on flat-washers-metric | slide | nord-lock-nl* |

## Sizes

| washer | bolt size | Øi inside (mm) | Øo outside (mm) | T (mm) | second table (TFC) |
|---|---|---|---|---|---|
| NL3 | M3 #5 | 3.4 | 7 | 1.8 | agrees |
| NL3.5 | M3.5 #6 | 3.9 | 7.6 | 1.8 | agrees |
| NL3.5sp | M3.5 #6 | 3.9 | 9 | 1.8 | agrees |
| NL4 | M4 #8 | 4.4 | 7.6 | 1.8 | agrees |
| NL4sp | M4 #8 | 4.4 | 9 | 1.8 | agrees |
| NL5 | M5 #10 | 5.4 | 9 | 1.8 | agrees |
| NL5sp | M5 #10 | 5.4 | 10.8 | 1.8 | agrees |
| NL6 | M6 | 6.5 | 10.8 | 1.8 | agrees |
| NL6sp | M6 | 6.5 | 13.5 | 2.5 | agrees |
| NL1/4 | 1/4 in | 7.2 | 11.5 | 2.5 | TFC prints T 1.8 |
| NL1/4sp | 1/4 in | 7.2 | 13.5 | 2.5 | agrees |
| NL8 | M8 5/16 in | 8.7 | 13.5 | 2.5 | agrees |
| NL8sp | M8 5/16 in | 8.7 | 16.6 | 2.5 | agrees |
| NL3/8 | 3/8 in | 10.3 | 16.6 | 2.5 | agrees |
| NL3/8sp | 3/8 in | 10.3 | 21 | 2.5 | agrees |
| NL10 | M10 | 10.7 | 16.6 | 2.5 | agrees |
| NL10sp | M10 | 10.7 | 21 | 2.5 | agrees |
| NL11 | M11 7/16 in | 11.4 | 18.5 | 2.5 | agrees |
| NL12 | M12 | 13 | 19.5 | 2.5 | agrees |
| NL12sp | M12 | 13 | 25.4 | 3.4 | agrees |
| NL1/2 | 1/2 in | 13.5 | 19.5 | 2.5 | agrees |
| NL1/2sp | 1/2 in | 13.5 | 25.4 | 3.4 | agrees |
| NL14 | M14 9/16 in | 15.2 | 23 | 3.4 | agrees |
| NL14sp | M14 9/16 in | 15.2 | 30.7 | 3.4 | agrees |
| NL16 | M16 5/8 in | 17 | 25.4 | 3.4 | agrees |
| NL16sp | M16 5/8 in | 17 | 30.7 | 3.4 | agrees |
| NL18 | M18 | 19.5 | 29 | 3.4 | agrees |
| NL18sp | M18 | 19.5 | 34.5 | 3.4 | agrees |
| NL3/4 | 3/4 in | 20 | 30.7 | 3.4 | agrees |
| NL3/4sp | 3/4 in | 20 | 39 | 3.4 | agrees |
| NL20 | M20 | 21.4 | 30.7 | 3.4 | agrees |
| NL20sp | M20 | 21.4 | 39 | 3.4 | agrees |
| NL22 | M22 7/8 in | 23.4 | 34.5 | 3.4 | agrees |
| NL22sp | M22 7/8 in | 23.4 | 42 | 4.6 | agrees |
| NL24 | M24 | 25.3 | 39 | 3.4 | agrees |
| NL24sp | M24 | 25.3 | 48.5 | 4.6 | agrees |
| NL1 | 1 in | 27.9 | 39 | 3.4 | agrees |
| NL1sp | 1 in | 27.9 | 48.5 | 4.6 | agrees |
| NL27 | M27 | 28.4 | 42 | 5.8 | agrees |
| NL27sp | M27 | 28.4 | 48.5 | 5.8 | agrees |
| NL30 | M30 1-1/8 in | 31.4 | 47 | 5.8 | agrees |
| NL30sp | M30 1-1/8 in | 31.4 | 55 | 5.8 | TFC prints Øo 58.5, T 6.6 |
| NL33 | M33 1-1/4 in | 34.4 | 48.5 | 5.8 | agrees |
| NL33sp | M33 1-1/4 in | 34.4 | 58.5 | 5.8 | TFC prints T 6.6 |
| NL36 | M36 1-3/8 in | 37.4 | 55 | 5.8 | TFC prints T 6.6 |
| NL36sp | M36 1-3/8 in | 37.4 | 63 | 6.6 | agrees |
| NL39 | M39 1-1/2 in | 40.4 | 58.5 | 5.8 | TFC prints T 6.6 |
| NL42 | M42 | 43.2 | 63 | 5.8 | TFC prints T 6.6 |
| NL45 | M45 1-3/4 in | 46.2 | 70 | 7 | agrees |
| NL48 | M48 | 49.6 | 75 | 7 | agrees |
| NL52 | M52 2 in | 53.6 | 80 | 7 | agrees |
| NL56 | M56 2-1/4 in | 59.1 | 85 | 7 | agrees |
| NL60 | M60 | 63.1 | 90 | 7 | agrees |
| NL64 | M64 2-1/2 in | 67.1 | 95 | 7 | agrees |
| NL68 | M68 | 71.1 | 100 | 9.5 | agrees |
| NL72 | M72 | 75.1 | 105 | 9.5 | agrees |
| NL76 | M76 3 in | 79.1 | 110 | 9.5 | agrees |
| NL80 | M80 3-1/8 in | 83.1 | 115 | 9.5 | agrees |
| NL85 | M85 | 88.1 | 120 | 9.5 | agrees |
| NL90 | M90 | 92.4 | 130 | 9.5 | agrees |
| NL95 | M95 | 97.4 | 135 | 9.5 | agrees |
| NL100 | M100 4 in | 103.4 | 145 | 9.5 | agrees |
| NL105 | M105 | 108.4 | 150 | 9.5 | agrees |
| NL110 | M110 | 113.4 | 155 | 9.5 | agrees |
| NL115 | M115 | 118.4 | 165 | 9.5 | agrees |
| NL120 | M120 | 123.4 | 170 | 9.5 | agrees |
| NL125 | M125 | 128.4 | 173 | 9.5 | agrees |
| NL130 | M130 5 in | 133.4 | 178 | 9.5 | agrees |

## Where the files are

- Nord-Lock (distributor table, Irontrade): [Nord-Lock steel washers (zinc flake coated) dimension table: bolt size, Øi, Øo, T, weight, minimum package, NL3 to NL130 incl. sp](https://irontrade.hu/storage/downloads/hu/Megfelelőségi nyilatkozatok/Nord-lock alátét - mérettáblázat (EN).pdf) — web — Publisher's page; dimensions are facts
- TFC (distributor): [Nord-Lock steel washers: ø, ø, T table, NL3 to NL130 incl. sp](https://tfc.eu.com/?p=1422) — web — Publisher's page; dimensions are facts
- Nord-Lock Group (maker): [Nord-Lock steel wedge-locking washers: product pages NL3 (d 3.4, D 7, T 1.8), NL1" (27.9 / 39 / 3.4) and NL1/2"sp (13.5 / 25.4 / 3.4); material, hardness 465 HV1, Delta Protekt](https://www.nord-lock.com/en-us/washers/steel/nl3/) — web — Publisher's page; dimensions are facts

## Free STEP/STL (18 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/index.json

- nord-lock-nl3: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl3.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl3.stl) — Nord-Lock NL3 washer pair envelope for M3 #5: plain annulus Ø3.4 inside, Ø7 outside, 1.8 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl4: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl4.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl4.stl) — Nord-Lock NL4 washer pair envelope for M4 #8: plain annulus Ø4.4 inside, Ø7.6 outside, 1.8 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl5: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl5.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl5.stl) — Nord-Lock NL5 washer pair envelope for M5 #10: plain annulus Ø5.4 inside, Ø9 outside, 1.8 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl6: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl6.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl6.stl) — Nord-Lock NL6 washer pair envelope for M6: plain annulus Ø6.5 inside, Ø10.8 outside, 1.8 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl8: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl8.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl8.stl) — Nord-Lock NL8 washer pair envelope for M8 5/16 in: plain annulus Ø8.7 inside, Ø13.5 outside, 2.5 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl10: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl10.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl10.stl) — Nord-Lock NL10 washer pair envelope for M10: plain annulus Ø10.7 inside, Ø16.6 outside, 2.5 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl12: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl12.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl12.stl) — Nord-Lock NL12 washer pair envelope for M12: plain annulus Ø13 inside, Ø19.5 outside, 2.5 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl14: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl14.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl14.stl) — Nord-Lock NL14 washer pair envelope for M14 9/16 in: plain annulus Ø15.2 inside, Ø23 outside, 3.4 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl16: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl16.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl16.stl) — Nord-Lock NL16 washer pair envelope for M16 5/8 in: plain annulus Ø17 inside, Ø25.4 outside, 3.4 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl18: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl18.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl18.stl) — Nord-Lock NL18 washer pair envelope for M18: plain annulus Ø19.5 inside, Ø29 outside, 3.4 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl20: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl20.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl20.stl) — Nord-Lock NL20 washer pair envelope for M20: plain annulus Ø21.4 inside, Ø30.7 outside, 3.4 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl24: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl24.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl24.stl) — Nord-Lock NL24 washer pair envelope for M24: plain annulus Ø25.3 inside, Ø39 outside, 3.4 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl8sp: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl8sp.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl8sp.stl) — Nord-Lock NL8sp washer pair envelope for M8 5/16 in: plain annulus Ø8.7 inside, Ø16.6 outside, 2.5 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl10sp: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl10sp.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl10sp.stl) — Nord-Lock NL10sp washer pair envelope for M10: plain annulus Ø10.7 inside, Ø21 outside, 2.5 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl12sp: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl12sp.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl12sp.stl) — Nord-Lock NL12sp washer pair envelope for M12: plain annulus Ø13 inside, Ø25.4 outside, 3.4 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl16sp: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl16sp.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl16sp.stl) — Nord-Lock NL16sp washer pair envelope for M16 5/8 in: plain annulus Ø17 inside, Ø30.7 outside, 3.4 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl20sp: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl20sp.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl20sp.stl) — Nord-Lock NL20sp washer pair envelope for M20: plain annulus Ø21.4 inside, Ø39 outside, 3.4 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn
- nord-lock-nl24sp: [STEP](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl24sp.step) · [STL](https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/nord-lock-nl24sp.stl) — Nord-Lock NL24sp washer pair envelope for M24: plain annulus Ø25.3 inside, Ø48.5 outside, 4.6 mm thick as printed (the maker pages do not say if T is the pair or one washer); cam faces not drawn

## Questions

**What are the dimensions of an NL10 Nord-Lock washer?**

Inner Ø10.7 mm, outer Ø16.6 mm, T 2.5 mm; the enlarged NL10sp is Ø10.7 × Ø21.0 × 2.5 mm.

**What does 'sp' mean on a Nord-Lock washer?**

An enlarged outer diameter at the same inside diameter, for example NL12 is Ø19.5 and NL12sp is Ø25.4 mm.

**Which Nord-Lock washer fits M12?**

NL12: inner Ø13.0 mm, outer Ø19.5 mm, T 2.5 mm (NL12sp: Ø25.4 outer, T 3.4).

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