Locknuts

1344 products

Locknuts

Locknuts are specialized fasteners designed to resist loosening under vibration, torque, and other dynamic forces. At Skdin, we offer high-quality Locknuts in various designs including nylon insert, all-metal, and prevailing torque types for applications where secure, vibration-resistant fastening is critical. Our locknuts feature innovative designs that create friction or mechanical interference to prevent unintentional loosening, ensuring reliable performance in demanding environments. Available in various materials, sizes, and configurations, our locknuts are ideal for automotive, aerospace, industrial machinery, and other applications where vibration is a concern. Explore our selection to find the perfect locknuts for your vibration-resistant fastening needs.

System of Measurement
Inch Metric
Thread Size
1 1/2"-12 1 1/2"-6 1 1/2"-8 1 1/4"-12 1 1/4"-7 1 1/4"-8 1 1/8"-12 1 1/8"-7 1 3/4"-12 1 3/4"-5 1 3/4"-8 1 3/8"-12 1 3/8"-8 1"-12 1"-14 1"-8 1/2"-13 1/2"-20 1/4"-20 1/4"-28 10-24 10-32 12-24 12-28 2 1/2"-12 2 1/4"-12 2 1/4"-8 2 3/4"-12 2"-12 2"-4 1/2 2"-8 2-56 3"-12 3-48 3/4"-10 3/4"-16 3/8"-16 3/8"-24 4-40 5-40 5/16"-18 5/16"-24 5/8"-11 5/8"-18 6-32 6-40 7/16"-14 7/16"-20 7/8"-14 7/8"-9 8-32 8-36 9/16"-12 9/16"-18 M10 M12 M14 M16 M18 M2 M2.5 M20 M22 M24 M27 M3 M30 M33 M36 M39 M4 M42 M45 M48 M5 M56 M6 M7 M8
Material
18-8 Stainless Steel 316 Stainless Steel 6061 Aluminum Black Corrosion-Resistant-Coated Steel Black Zinc Plated Steel Black-Oxide 18-8 Stainless Steel Black-Oxide Steel Black-Phosphate Steel Brass Cadmium Yellow-Chromate Plated Steel Cadmium-Plated Steel Grade 5 Titanium Silver-Plated 18-8 Stainless Steel Steel Zinc Yellow-Chromate Plated Steel Zinc-Flake-Coated Steel Zinc-Plated Steel
Nut Type
Locknut, Hex Locknut; Hex
Width
1/4" 5/16" 11/32" 3/8" 7/16" 1/2" 9/16" 5/8" 11/16" 3/4" 13/16" 7/8" 15/16" 1" 1 1/16" 1 1/8" 1 1/4" 1 5/16" 1 7/16" 1 1/2" 1 5/8" 1 11/16" 1 13/16" 1 7/8" 1 15/16" 2" 2 1/64" 2 3/16" 2 13/64" 2 1/4" 2 3/8" 2 25/64" 2 5/8" 2 3/4" 2 49/64" 3" 3 1/8" 3 9/64" 3 1/2" 3 33/64" 4" 4 1/2" 4 mm 5 mm 5.5 mm 7 mm 8 mm 10 mm 11 mm 12 mm 13 mm 14 mm 17 mm 19 mm 22 mm 24 mm 27 mm 30 mm 32 mm 33 mm 36 mm 41 mm 46 mm 50 mm 55 mm 60 mm 65 mm 70 mm 75 mm 85 mm
Height
3/32" 7/64" 1/8" 9/64" 5/32" 11/64" 3/16" 7/32" 15/64" 1/4" 17/64" 9/32" 19/64" 5/16" 21/64" 11/32" 23/64" 3/8" 25/64" 13/32" 27/64" 7/16" 29/64" 15/32" 31/64" 1/2" 33/64" 17/32" 35/64" 9/16" 37/64" 19/32" 39/64" 5/8" 41/64" 21/32" 11/16" 45/64" 23/32" 47/64" 3/4" 49/64" 25/32" 13/16" 27/32" 55/64" 7/8" 57/64" 29/32" 59/64" 15/16" 63/64" 1" 1 1/64" 1 1/32" 1 3/64" 1 1/16" 1 3/32" 1 7/64" 1 1/8" 1 9/64" 1 11/64" 1 3/16" 1 13/64" 1 1/4" 1 17/64" 1 9/32" 1 5/16" 1 25/64" 1 13/32" 1 15/32" 1 1/2" 1 39/64" 1 41/64" 1 43/64" 1 11/16" 1 23/32" 1 51/64" 1 59/64" 1 15/16" 2 1/32" 2 3/16" 2 5/16" 2 13/32" 2 41/64" 2 13/16" 2.8 mm 3 mm 3.2 mm 3.3 mm 3.5 mm 3.7 mm 3.8 mm 4 mm 4.1 mm 4.2 mm 4.5 mm 4.6 mm 4.8 mm 5 mm 5.1 mm 5.2 mm 5.3 mm 5.5 mm 6 mm 6.2 mm 6.3 mm 6.4 mm 6.5 mm 6.6 mm 7.2 mm 7.3 mm 7.5 mm 7.8 mm 8 mm 8.5 mm 8.8 mm 9.2 mm 9.5 mm 9.7 mm 10 mm 10.4 mm 10.7 mm 11 mm 11.5 mm 11.7 mm 12 mm 13 mm 13.8 mm 14 mm 14.6 mm 15 mm 15.6 mm 16 mm 18 mm 18.2 mm 18.5 mm 19 mm 20 mm 20.8 mm 21 mm 21.5 mm 22 mm 23.4 mm 24 mm 24.4 mm 25 mm 26 mm 27 mm 28 mm 28.6 mm 30 mm 31.2 mm 33 mm 36 mm 38 mm 39 mm 42 mm 45 mm 46 mm 48 mm 50 mm 57 mm
Thread Type
Metric UN UNC UNEF UNF UNS
Thread Direction
Left Hand Right Hand
Thread Pitch
0.4 mm 0.45 mm 0.5 mm 0.7 mm 0.8 mm 1 mm 1.25 mm 1.5 mm 1.75 mm 2 mm 2.5 mm 3 mm 3.5 mm 4 mm 4.5 mm 5 mm 5.5 mm
Washer Type
External-Tooth Lock Spring Lock
Washer OD
0.281" 0.328" 0.344" 0.375" 0.406" 0.5" 0.578" 0.592" 0.656" 0.871" 0.891" 6.5 mm 7.1 mm 8 mm 8.2 mm 8.5 mm 9.5 mm 10 mm 11.5 mm 12 mm 14 mm 15.1 mm 15.5 mm 18 mm 19.2 mm 20.1 mm 22 mm 25.5 mm
Washer Material
18-8 Stainless Steel 400 Stainless Steel Black-Oxide 400 Stainless Steel Steel
Strength Class
ASTM Grade C Class 10 Class 6 Class 8 Grade 2 Grade 5 Grade 8 Grade 9
Show more▼
Part Number Thread Size Thread Type Thread Fit Thread Direction Width Drive Style Material Height Locking Type Nut Type
1167FA00025 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Steel 21/64" Distorted Thread Locknut; Hex
1138FA00007 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Steel 29/64" Nylon Insert Locknut, Hex
1174FA00005 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc Yellow-Chromate Plated Steel 21/64" Distorted Thread Locknut, Hex
1167FA00123 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc Yellow-Chromate Plated Steel 21/64" Distorted Thread Locknut; Hex
1138FA00049 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc Yellow-Chromate Plated Steel 29/64" Nylon Insert Locknut, Hex
1174FA00029 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Flake-Coated Steel 21/64" Distorted Thread Locknut, Hex
1167FA00161 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Flake-Coated Steel 21/64" Distorted Thread Locknut; Hex
1193FA00005 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Cotter Pin Locknut, Hex
1191FA00003 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Cotter Pin Locknut; Hex
1177FA00003 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Distorted Thread Locknut, Hex
1170FA00007 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Distorted Thread Locknut, Hex
1167FA00043 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Distorted Thread Locknut; Hex
1136FA00006 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Serrations Locknut, Hex
1169FA00031 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 3/8" Distorted Thread Locknut, Hex
1161FA00015 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 25/64" Lock Washer Locknut, Hex
1144FA00026 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 29/64" Nylon Insert Locknut, Hex
1141FA00004 3/8"-16 UNC Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 29/64" Nylon Insert Locknut; Hex
1189FA00003 3/8"-16 UNC Class 2B Right Hand 5/8" External Hex 18-8 Stainless Steel 25/64" Flex-Top Locknut, Hex
1190FA00006 3/8"-16 UNC Class 2B Right Hand 5/8" External Hex Cadmium-Plated Steel 9/32" Flex-Top Locknut, Hex
1188FA00006 3/8"-16 UNC Class 2B Right Hand 5/8" External Hex Cadmium-Plated Steel 25/64" Flex-Top Locknut, Hex
1158FA00003 3/8"-16 UNC Class 2B Right Hand 11/16" External Hex 18-8 Stainless Steel 35/64" Nylon Insert Locknut, Hex
1157FA00001 3/8"-16 UNC Class 2B Right Hand 11/16" External Hex 316 Stainless Steel 13/32" Nylon Insert Locknut, Hex
1159FA00001 3/8"-16 UNC Class 2B Right Hand 11/16" External Hex 316 Stainless Steel 35/64" Nylon Insert Locknut, Hex
1155FA00011 3/8"-16 UNC Class 2B Right Hand 11/16" External Hex Black Corrosion-Resistant-Coated Steel 13/32" Nylon Insert Locknut, Hex
1197FA00002 3/8"-16 UNC Class 2B Right Hand 11/16" External Hex Steel 13/32" Steel Insert Locknut, Hex
1155FA00003 3/8"-16 UNC Class 2B Right Hand 11/16" External Hex Zinc-Plated Steel 13/32" Nylon Insert Locknut, Hex
1160FA00003 3/8"-16 UNC Class 2B Right Hand 11/16" External Hex Zinc-Plated Steel 35/64" Nylon Insert Locknut, Hex
1148FA00010 3/8"-16 UNC Class 3B Right Hand 9/16" External Hex 18-8 Stainless Steel 29/64" Nylon Insert Locknut, Hex
1156FA00005 3/8"-16 UNC Class 3B Right Hand 11/16" External Hex 18-8 Stainless Steel 13/32" Nylon Insert Locknut, Hex
1187FA00010 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex 18-8 Stainless Steel 9/32" Flex-Top Locknut, Hex
1172FA00022 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex 18-8 Stainless Steel 21/64" Distorted Thread Locknut, Hex
1178FA00006 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex 18-8 Stainless Steel 21/64" Distorted Thread Locknut, Hex
1163FA00014 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex 18-8 Stainless Steel 25/64" Lock Washer Locknut, Hex
1194FA00014 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex 18-8 Stainless Steel 13/32" Cotter Pin Locknut, Hex
1146FA00024 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex 18-8 Stainless Steel 29/64" Nylon Insert Locknut, Hex
1183FA00009 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex 18-8 Stainless Steel 15/32" Flex-Top Locknut, Hex
1149FA00020 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex 316 Stainless Steel 29/64" Nylon Insert Locknut, Hex
1146FA00054 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Black-Oxide 18-8 Stainless Steel 29/64" Nylon Insert Locknut, Hex
1167FA00152 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Black-Oxide Steel 21/64" Distorted Thread Locknut; Hex
1169FA00012 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Black-Oxide Steel 3/8" Distorted Thread Locknut, Hex
1138FA00081 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Black-Oxide Steel 29/64" Nylon Insert Locknut, Hex
1186FA00037 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Cadmium-Plated Steel 9/32" Flex-Top Locknut, Hex
1167FA00008 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Cadmium-Plated Steel 21/64" Distorted Thread Locknut; Hex
1186FA00014 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Steel 9/32" Flex-Top Locknut, Hex
1167FA00026 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Steel 21/64" Distorted Thread Locknut; Hex
1138FA00014 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Steel 29/64" Nylon Insert Locknut, Hex
1137FA00003 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Steel 33/64" Two-Piece Clamp Locknut, Hex
1174FA00006 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc Yellow-Chromate Plated Steel 21/64" Distorted Thread Locknut, Hex
1167FA00133 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc Yellow-Chromate Plated Steel 21/64" Distorted Thread Locknut; Hex
1138FA00050 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc Yellow-Chromate Plated Steel 29/64" Nylon Insert Locknut, Hex
1167FA00167 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Flake-Coated Steel 21/64" Distorted Thread Locknut; Hex
1193FA00006 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Cotter Pin Locknut, Hex
1191FA00010 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Cotter Pin Locknut; Hex
1177FA00007 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Distorted Thread Locknut, Hex
1170FA00010 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Distorted Thread Locknut, Hex
1167FA00044 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 21/64" Distorted Thread Locknut; Hex
1169FA00023 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 3/8" Distorted Thread Locknut, Hex
1161FA00019 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 25/64" Lock Washer Locknut, Hex
1144FA00033 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 29/64" Nylon Insert Locknut, Hex
1141FA00005 3/8"-24 UNF Class 2B Right Hand 9/16" External Hex Zinc-Plated Steel 29/64" Nylon Insert Locknut; Hex
1148FA00011 3/8"-24 UNF Class 3B Right Hand 9/16" External Hex 18-8 Stainless Steel 15/32" Nylon Insert Locknut, Hex
1182FA00007 3/8"-24 UNF Class 3B Right Hand 9/16" External Hex Cadmium Yellow-Chromate Plated Steel 15/32" Flex-Top Locknut, Hex
1145FA00007 3/8"-24 UNF Class 3B Right Hand 9/16" External Hex Cadmium Yellow-Chromate Plated Steel 15/32" Nylon Insert Locknut, Hex
1185FA00006 3/8"-24 UNF Class 3B Right Hand 9/16" External Hex Silver-Plated 18-8 Stainless Steel 25/64" Flex-Top Locknut, Hex
1163FA00001 4-40 UNC Class 2B Right Hand 1/4" External Hex 18-8 Stainless Steel 1/8" Lock Washer Locknut, Hex
1146FA00003 4-40 UNC Class 2B Right Hand 1/4" External Hex 18-8 Stainless Steel 9/64" Nylon Insert Locknut, Hex
1149FA00001 4-40 UNC Class 2B Right Hand 1/4" External Hex 316 Stainless Steel 9/64" Nylon Insert Locknut, Hex
1161FA00001 4-40 UNC Class 2B Right Hand 1/4" External Hex Black Zinc Plated Steel 1/8" Lock Washer Locknut, Hex
1146FA00037 4-40 UNC Class 2B Right Hand 1/4" External Hex Black-Oxide 18-8 Stainless Steel 9/64" Nylon Insert Locknut, Hex
1166FA00001 4-40 UNC Class 2B Right Hand 1/4" External Hex Black-Oxide Steel 9/64" Lock Washer Locknut, Hex
1152FA00011 4-40 UNC Class 2B Right Hand 1/4" External Hex Brass 9/64" Nylon Insert Locknut, Hex
1153FA00001 4-40 UNC Class 2B Right Hand 1/4" External Hex Grade 5 Titanium 9/64" Nylon Insert Locknut, Hex
1161FA00009 4-40 UNC Class 2B Right Hand 1/4" External Hex Zinc-Plated Steel 7/64" Lock Washer Locknut, Hex
1166FA00006 4-40 UNC Class 2B Right Hand 1/4" External Hex Zinc-Plated Steel 9/64" Lock Washer Locknut, Hex
1144FA00003 4-40 UNC Class 2B Right Hand 1/4" External Hex Zinc-Plated Steel 9/64" Nylon Insert Locknut, Hex
1148FA00002 4-40 UNC Class 3B Right Hand 1/4" External Hex 18-8 Stainless Steel 5/32" Nylon Insert Locknut, Hex
1182FA00002 4-40 UNC Class 3B Right Hand 1/4" External Hex Cadmium Yellow-Chromate Plated Steel 5/32" Flex-Top Locknut, Hex
1145FA00001 4-40 UNC Class 3B Right Hand 1/4" External Hex Cadmium Yellow-Chromate Plated Steel 5/32" Nylon Insert Locknut, Hex
1185FA00001 4-40 UNC Class 3B Right Hand 1/4" External Hex Silver-Plated 18-8 Stainless Steel 9/64" Flex-Top Locknut, Hex
1146FA00004 5-40 UNC Class 2B Right Hand 1/4" External Hex 18-8 Stainless Steel 9/64" Nylon Insert Locknut, Hex
1149FA00002 5-40 UNC Class 2B Right Hand 1/4" External Hex 316 Stainless Steel 9/64" Nylon Insert Locknut, Hex
1146FA00047 5-40 UNC Class 2B Right Hand 1/4" External Hex Black-Oxide 18-8 Stainless Steel 9/64" Nylon Insert Locknut, Hex
1144FA00004 5-40 UNC Class 2B Right Hand 1/4" External Hex Zinc-Plated Steel 9/64" Nylon Insert Locknut, Hex
1161FA00020 5-40 UNC Class 2B Right Hand 5/16" External Hex Zinc-Plated Steel 9/64" Lock Washer Locknut, Hex
1175FA00002 5/16"-18 UNC Class 2B Left Hand 1/2" External Hex Zinc-Plated Steel 17/64" Distorted Thread Locknut, Hex
1172FA00019 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 18-8 Stainless Steel 17/64" Distorted Thread Locknut, Hex
1178FA00003 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 18-8 Stainless Steel 17/64" Distorted Thread Locknut, Hex
1187FA00007 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 18-8 Stainless Steel 17/64" Flex-Top Locknut, Hex
1194FA00002 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 18-8 Stainless Steel 21/64" Cotter Pin Locknut, Hex
1163FA00011 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 18-8 Stainless Steel 21/64" Lock Washer Locknut, Hex
1146FA00010 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 18-8 Stainless Steel 11/32" Nylon Insert Locknut, Hex
1183FA00006 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 18-8 Stainless Steel 23/64" Flex-Top Locknut, Hex
1179FA00002 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 316 Stainless Steel 17/64" Distorted Thread Locknut, Hex
1173FA00005 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 316 Stainless Steel 17/64" Distorted Thread Locknut, Hex
1149FA00017 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 316 Stainless Steel 11/32" Nylon Insert Locknut, Hex
1151FA00005 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex 6061 Aluminum 11/32" Nylon Insert Locknut, Hex
1144FA00051 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex Black Corrosion-Resistant-Coated Steel 11/32" Nylon Insert Locknut, Hex
1146FA00042 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex Black-Oxide 18-8 Stainless Steel 11/32" Nylon Insert Locknut, Hex
1174FA00020 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex Black-Oxide Steel 17/64" Distorted Thread Locknut, Hex
1167FA00142 5/16"-18 UNC Class 2B Right Hand 1/2" External Hex Black-Oxide Steel 17/64" Distorted Thread Locknut; Hex
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