Nord-Lock wedge-locking washers NL3 to NL130: inner and outer diameter, thickness, enlarged-OD (sp) pairs, two tables compared — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/nord-lock-wedge-locking-washers/ (sheet CC BY 4.0) 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 Catalog version: 2026-10-20 Overall (mm): length 48.5, width 48.5, height 4.6 - 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). 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 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - 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 — web — Publisher's page; dimensions are facts — https://irontrade.hu/storage/downloads/hu/Megfelelőségi nyilatkozatok/Nord-lock alátét - mérettáblázat (EN).pdf - TFC (distributor): Nord-Lock steel washers: ø, ø, T table, NL3 to NL130 incl. sp — web — Publisher's page; dimensions are facts — https://tfc.eu.com/?p=1422 - 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 — web — Publisher's page; dimensions are facts — https://www.nord-lock.com/en-us/washers/steel/nl3/ Free files (CC BY 4.0, Xem Studio; STEP + STL, 18 parts): https://xemstudio.com/files/hardware/nord-lock-wedge-locking-washers/index.json API: https://xemstudio.com/api/geometry?object=nord-lock-wedge-locking-washers