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
1186FA00004 1 1/2"-12 UNF Class 2B Right Hand 2 3/16" External Hex Cadmium-Plated Steel 57/64" Flex-Top Locknut, Hex
1186FA00025 1 1/2"-12 UNF Class 2B Right Hand 2 3/16" External Hex Steel 57/64" Flex-Top Locknut, Hex
1138FA00101 1 1/2"-12 UNF Class 2B Right Hand 2 13/64" External Hex Black-Oxide Steel 1 39/64" Nylon Insert Locknut, Hex
1138FA00025 1 1/2"-12 UNF Class 2B Right Hand 2 13/64" External Hex Steel 1 39/64" Nylon Insert Locknut, Hex
1138FA00042 1 1/2"-12 UNF Class 2B Right Hand 2 13/64" External Hex Zinc Yellow-Chromate Plated Steel 1 39/64" Nylon Insert Locknut, Hex
1193FA00024 1 1/2"-12 UNF Class 2B Right Hand 2 1/4" External Hex Zinc-Plated Steel 1 5/16" Cotter Pin Locknut, Hex
1167FA00064 1 1/2"-12 UNF Class 2B Right Hand 2 1/4" External Hex Zinc-Plated Steel 1 5/16" Distorted Thread Locknut; Hex
1154FA00002 1 1/2"-12 UNF Class 2B Right Hand 2 3/8" External Hex Black-Phosphate Steel 1 5/16" Nylon Insert Locknut, Hex
1138FA00024 1 1/2"-6 UNC Class 2B Right Hand 2 3/16" External Hex Steel 1 39/64" Nylon Insert Locknut, Hex
1146FA00016 1 1/2"-6 UNC Class 2B Right Hand 2 13/64" External Hex 18-8 Stainless Steel 1 39/64" Nylon Insert Locknut, Hex
1149FA00028 1 1/2"-6 UNC Class 2B Right Hand 2 13/64" External Hex 316 Stainless Steel 1 39/64" Nylon Insert Locknut, Hex
1138FA00100 1 1/2"-6 UNC Class 2B Right Hand 2 13/64" External Hex Black-Oxide Steel 1 39/64" Nylon Insert Locknut, Hex
1138FA00065 1 1/2"-6 UNC Class 2B Right Hand 2 13/64" External Hex Zinc Yellow-Chromate Plated Steel 1 39/64" Nylon Insert Locknut, Hex
1141FA00001 1 1/2"-6 UNC Class 2B Right Hand 2 13/64" External Hex Zinc-Plated Steel 1 39/64" Nylon Insert Locknut; Hex
1194FA00010 1 1/2"-6 UNC Class 2B Right Hand 2 1/4" External Hex 18-8 Stainless Steel 1 1/2" Cotter Pin Locknut, Hex
1199FA00009 1 1/2"-6 UNC Class 2B Right Hand 2 1/4" External Hex Steel 1" Steel Insert Locknut, Hex
1195FA00009 1 1/2"-6 UNC Class 2B Right Hand 2 1/4" External Hex Steel 1 1/2" Steel Insert Locknut, Hex
1193FA00023 1 1/2"-6 UNC Class 2B Right Hand 2 1/4" External Hex Zinc-Plated Steel 1 5/16" Cotter Pin Locknut, Hex
1167FA00063 1 1/2"-6 UNC Class 2B Right Hand 2 1/4" External Hex Zinc-Plated Steel 1 5/16" Distorted Thread Locknut; Hex
1197FA00008 1 1/2"-6 UNC Class 2B Right Hand 2 3/8" External Hex Steel 1 11/16" Steel Insert Locknut, Hex
1160FA00011 1 1/2"-6 UNC Class 2B Right Hand 2 3/8" External Hex Zinc-Plated Steel 1 59/64" Nylon Insert Locknut, Hex
1138FA00104 1 1/2"-6 UNC Class 2B Right Hand 2 25/64" External Hex Black-Oxide Steel 1 59/64" Nylon Insert Locknut, Hex
1138FA00030 1 1/2"-6 UNC Class 2B Right Hand 2 25/64" External Hex Steel 1 59/64" Nylon Insert Locknut, Hex
1138FA00070 1 1/2"-6 UNC Class 2B Right Hand 2 25/64" External Hex Zinc Yellow-Chromate Plated Steel 1 59/64" Nylon Insert Locknut, Hex
1138FA00105 1 1/2"-8 UNC Class 2B Right Hand 2 25/64" External Hex Black-Oxide Steel 1 59/64" Nylon Insert Locknut, Hex
1138FA00031 1 1/2"-8 UNC Class 2B Right Hand 2 25/64" External Hex Steel 1 59/64" Nylon Insert Locknut, Hex
1138FA00071 1 1/2"-8 UNC Class 2B Right Hand 2 25/64" External Hex Zinc Yellow-Chromate Plated Steel 1 59/64" Nylon Insert Locknut, Hex
1138FA00099 1 1/4"-12 UNF Class 2B Right Hand 1 13/16" External Hex Black-Oxide Steel 1 25/64" Nylon Insert Locknut, Hex
1186FA00003 1 1/4"-12 UNF Class 2B Right Hand 1 13/16" External Hex Cadmium-Plated Steel 49/64" Flex-Top Locknut, Hex
1186FA00023 1 1/4"-12 UNF Class 2B Right Hand 1 13/16" External Hex Steel 49/64" Flex-Top Locknut, Hex
1138FA00023 1 1/4"-12 UNF Class 2B Right Hand 1 13/16" External Hex Steel 1 25/64" Nylon Insert Locknut, Hex
1138FA00041 1 1/4"-12 UNF Class 2B Right Hand 1 13/16" External Hex Zinc Yellow-Chromate Plated Steel 1 25/64" Nylon Insert Locknut, Hex
1193FA00022 1 1/4"-12 UNF Class 2B Right Hand 1 7/8" External Hex Zinc-Plated Steel 1 1/16" Cotter Pin Locknut, Hex
1191FA00020 1 1/4"-12 UNF Class 2B Right Hand 1 7/8" External Hex Zinc-Plated Steel 1 3/32" Cotter Pin Locknut; Hex
1167FA00062 1 1/4"-12 UNF Class 2B Right Hand 1 7/8" External Hex Zinc-Plated Steel 1 3/32" Distorted Thread Locknut; Hex
1154FA00001 1 1/4"-12 UNF Class 2B Right Hand 2" External Hex Black-Phosphate Steel 1 7/64" Nylon Insert Locknut, Hex
1146FA00015 1 1/4"-7 UNC Class 2B Right Hand 1 13/16" External Hex 18-8 Stainless Steel 1 25/64" Nylon Insert Locknut, Hex
1149FA00027 1 1/4"-7 UNC Class 2B Right Hand 1 13/16" External Hex 316 Stainless Steel 1 25/64" Nylon Insert Locknut, Hex
1138FA00098 1 1/4"-7 UNC Class 2B Right Hand 1 13/16" External Hex Black-Oxide Steel 1 25/64" Nylon Insert Locknut, Hex
1138FA00064 1 1/4"-7 UNC Class 2B Right Hand 1 13/16" External Hex Zinc Yellow-Chromate Plated Steel 1 25/64" Nylon Insert Locknut, Hex
1144FA00045 1 1/4"-7 UNC Class 2B Right Hand 1 13/16" External Hex Zinc-Plated Steel 1 25/64" Nylon Insert Locknut, Hex
1141FA00023 1 1/4"-7 UNC Class 2B Right Hand 1 13/16" External Hex Zinc-Plated Steel 1 25/64" Nylon Insert Locknut; Hex
1194FA00009 1 1/4"-7 UNC Class 2B Right Hand 1 7/8" External Hex 18-8 Stainless Steel 1 1/4" Cotter Pin Locknut, Hex
1199FA00008 1 1/4"-7 UNC Class 2B Right Hand 1 7/8" External Hex Steel 7/8" Steel Insert Locknut, Hex
1195FA00008 1 1/4"-7 UNC Class 2B Right Hand 1 7/8" External Hex Steel 1 1/4" Steel Insert Locknut, Hex
1193FA00021 1 1/4"-7 UNC Class 2B Right Hand 1 7/8" External Hex Zinc-Plated Steel 1 3/32" Cotter Pin Locknut, Hex
1191FA00019 1 1/4"-7 UNC Class 2B Right Hand 1 7/8" External Hex Zinc-Plated Steel 1 3/32" Cotter Pin Locknut; Hex
1167FA00061 1 1/4"-7 UNC Class 2B Right Hand 1 7/8" External Hex Zinc-Plated Steel 1 3/32" Distorted Thread Locknut; Hex
1197FA00007 1 1/4"-7 UNC Class 2B Right Hand 2" External Hex Steel 1 13/32" Steel Insert Locknut, Hex
1155FA00008 1 1/4"-7 UNC Class 2B Right Hand 2" External Hex Zinc-Plated Steel 1 7/64" Nylon Insert Locknut, Hex
1160FA00010 1 1/4"-7 UNC Class 2B Right Hand 2" External Hex Zinc-Plated Steel 1 41/64" Nylon Insert Locknut, Hex
1138FA00103 1 1/4"-7 UNC Class 2B Right Hand 2 1/64" External Hex Black-Oxide Steel 1 41/64" Nylon Insert Locknut, Hex
1138FA00027 1 1/4"-7 UNC Class 2B Right Hand 2 1/64" External Hex Steel 1 41/64" Nylon Insert Locknut, Hex
1138FA00068 1 1/4"-7 UNC Class 2B Right Hand 2 1/64" External Hex Zinc Yellow-Chromate Plated Steel 1 41/64" Nylon Insert Locknut, Hex
1138FA00028 1 1/4"-8 UNC Class 2B Right Hand 2 1/64" External Hex Steel 1 41/64" Nylon Insert Locknut, Hex
1138FA00069 1 1/4"-8 UNC Class 2B Right Hand 2 1/64" External Hex Zinc Yellow-Chromate Plated Steel 1 41/64" Nylon Insert Locknut, Hex
1138FA00097 1 1/8"-12 UNF Class 2B Right Hand 1 5/8" External Hex Black-Oxide Steel 1 11/64" Nylon Insert Locknut, Hex
1186FA00022 1 1/8"-12 UNF Class 2B Right Hand 1 5/8" External Hex Steel 41/64" Flex-Top Locknut, Hex
1138FA00022 1 1/8"-12 UNF Class 2B Right Hand 1 5/8" External Hex Steel 1 11/64" Nylon Insert Locknut, Hex
1138FA00040 1 1/8"-12 UNF Class 2B Right Hand 1 5/8" External Hex Zinc Yellow-Chromate Plated Steel 1 11/64" Nylon Insert Locknut, Hex
1167FA00060 1 1/8"-12 UNF Class 2B Right Hand 1 11/16" External Hex Zinc-Plated Steel 1" Distorted Thread Locknut; Hex
1154FA00008 1 1/8"-12 UNF Class 2B Right Hand 1 7/8" External Hex Steel 1" Nylon Insert Locknut, Hex
1146FA00014 1 1/8"-7 UNC Class 2B Right Hand 1 5/8" External Hex 18-8 Stainless Steel 1 11/64" Nylon Insert Locknut, Hex
1149FA00026 1 1/8"-7 UNC Class 2B Right Hand 1 5/8" External Hex 316 Stainless Steel 1 11/64" Nylon Insert Locknut, Hex
1138FA00096 1 1/8"-7 UNC Class 2B Right Hand 1 5/8" External Hex Black-Oxide Steel 1 11/64" Nylon Insert Locknut, Hex
1138FA00021 1 1/8"-7 UNC Class 2B Right Hand 1 5/8" External Hex Steel 1 11/64" Nylon Insert Locknut, Hex
1138FA00063 1 1/8"-7 UNC Class 2B Right Hand 1 5/8" External Hex Zinc Yellow-Chromate Plated Steel 1 11/64" Nylon Insert Locknut, Hex
1144FA00044 1 1/8"-7 UNC Class 2B Right Hand 1 5/8" External Hex Zinc-Plated Steel 1 11/64" Nylon Insert Locknut, Hex
1141FA00022 1 1/8"-7 UNC Class 2B Right Hand 1 5/8" External Hex Zinc-Plated Steel 1 11/64" Nylon Insert Locknut; Hex
1167FA00059 1 1/8"-7 UNC Class 2B Right Hand 1 11/16" External Hex Zinc-Plated Steel 1" Distorted Thread Locknut; Hex
1197FA00001 1 1/8"-7 UNC Class 2B Right Hand 1 13/16" External Hex Steel 1 17/64" Steel Insert Locknut, Hex
1193FA00026 1 3/4"-12 UN Class 2B Right Hand 2 5/8" External Hex Zinc-Plated Steel 1 1/2" Cotter Pin Locknut, Hex
1154FA00003 1 3/4"-12 UN Class 2B Right Hand 2 3/4" External Hex Black-Phosphate Steel 1 15/32" Nylon Insert Locknut, Hex
1138FA00107 1 3/4"-12 UNF Class 2B Right Hand 2 49/64" External Hex Black-Oxide Steel 2 5/16" Nylon Insert Locknut, Hex
1138FA00033 1 3/4"-12 UNF Class 2B Right Hand 2 49/64" External Hex Steel 2 5/16" Nylon Insert Locknut, Hex
1138FA00073 1 3/4"-12 UNF Class 2B Right Hand 2 49/64" External Hex Zinc Yellow-Chromate Plated Steel 2 5/16" Nylon Insert Locknut, Hex
1193FA00025 1 3/4"-5 UNC Class 2B Right Hand 2 5/8" External Hex Zinc-Plated Steel 1 1/2" Cotter Pin Locknut, Hex
1197FA00009 1 3/4"-5 UNC Class 2B Right Hand 2 3/4" External Hex Steel 2 1/32" Steel Insert Locknut, Hex
1138FA00106 1 3/4"-5 UNC Class 2B Right Hand 2 49/64" External Hex Black-Oxide Steel 2 5/16" Nylon Insert Locknut, Hex
1138FA00032 1 3/4"-5 UNC Class 2B Right Hand 2 49/64" External Hex Steel 2 5/16" Nylon Insert Locknut, Hex
1138FA00072 1 3/4"-5 UNC Class 2B Right Hand 2 49/64" External Hex Zinc Yellow-Chromate Plated Steel 2 5/16" Nylon Insert Locknut, Hex
1138FA00034 1 3/4"-8 UNC Class 2B Right Hand 2 49/64" External Hex Steel 2 5/16" Nylon Insert Locknut, Hex
1138FA00074 1 3/4"-8 UNC Class 2B Right Hand 2 49/64" External Hex Zinc Yellow-Chromate Plated Steel 2 5/16" Nylon Insert Locknut, Hex
1186FA00024 1 3/8"-12 UNF Class 2B Right Hand 1 15/16" External Hex Steel 57/64" Flex-Top Locknut, Hex
1154FA00009 1 3/8"-12 UNF Class 2B Right Hand 2 13/64" External Hex Steel 1 3/16" Nylon Insert Locknut, Hex
1138FA00029 1 3/8"-8 UNC Class 2B Right Hand 2 3/16" External Hex Steel 1 51/64" Nylon Insert Locknut, Hex
1146FA00018 1"-12 UNF Class 2B Right Hand 1 7/16" External Hex 18-8 Stainless Steel 1 3/64" Nylon Insert Locknut, Hex
1149FA00031 1"-12 UNF Class 2B Right Hand 1 7/16" External Hex 316 Stainless Steel 1 3/64" Nylon Insert Locknut, Hex
1138FA00066 1"-12 UNF Class 2B Right Hand 1 7/16" External Hex Zinc Yellow-Chromate Plated Steel 1 3/64" Nylon Insert Locknut, Hex
1191FA00018 1"-14 UNEF Class 2B Right Hand 1 1/2" External Hex Zinc-Plated Steel 55/64" Cotter Pin Locknut; Hex
1146FA00035 1"-14 UNS Class 2B Right Hand 1 7/16" External Hex 18-8 Stainless Steel 1 3/64" Nylon Insert Locknut, Hex
1149FA00014 1"-14 UNS Class 2B Right Hand 1 7/16" External Hex 316 Stainless Steel 1 3/64" Nylon Insert Locknut, Hex
1138FA00095 1"-14 UNS Class 2B Right Hand 1 7/16" External Hex Black-Oxide Steel 1 3/64" Nylon Insert Locknut, Hex
1186FA00027 1"-14 UNS Class 2B Right Hand 1 7/16" External Hex Cadmium-Plated Steel 37/64" Flex-Top Locknut, Hex
1186FA00021 1"-14 UNS Class 2B Right Hand 1 7/16" External Hex Steel 37/64" Flex-Top Locknut, Hex
1138FA00018 1"-14 UNS Class 2B Right Hand 1 7/16" External Hex Steel 1 3/64" Nylon Insert Locknut, Hex
1138FA00039 1"-14 UNS Class 2B Right Hand 1 7/16" External Hex Zinc Yellow-Chromate Plated Steel 1 3/64" Nylon Insert Locknut, Hex
1144FA00043 1"-14 UNS Class 2B Right Hand 1 7/16" External Hex Zinc-Plated Steel 1 3/64" Nylon Insert Locknut, Hex
1141FA00021 1"-14 UNS Class 2B Right Hand 1 7/16" External Hex Zinc-Plated Steel 1 3/64" Nylon Insert Locknut; Hex
1178FA00017 1"-14 UNS Class 2B Right Hand 1 1/2" External Hex 18-8 Stainless Steel 55/64" Distorted Thread Locknut, Hex
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