Types of lock washers and their uses

terminology

#1

So what is a lockwasher you ask? A washer is a metal or non-metal material that is made to go underneath a nut, bolt, or fastener. Mainly used to stop a leak or simply stopping something from vibrating loose. In addition to that they may also be used to help disperse the amount of pressure exerted onto a hole or joint. Lock washers are made for fasteners that tend to loosen from vibration or friction. They are many different types but they all try to achieve the same goal, and that is to lock a fastener in place. Washer dimensions can come in either imperial or metric units. If you do not have a specific size most manufacturers will be able to custom build a washer to fit your application. Washers can follow ANSI, SAE, USS, and JIS sizes as well.

We currently have a list of split lock, sealing, internal tooth, external tooth, flat, and flat retaining. Below I will go over what each one is and their use.

  • Split Lock- Split locks are also called helical spring lock washers. These are made out of a spring coil that cut or split. This makes it so the two ends of the coil forced outward to the mating surface. So when the washer is fastened each end of the coil will bite into the surface of the head of the screw and to the surface to which you are fastening too.

  • Sealing- Sealing washers use a form of a silicone rubber that is bonded to the steel of the washer. These are made to be used with screws, bolts, and nuts. They are a simple solution to any sealing needs. They have a seal on the bottom of the washer that seals the surface of the washer face, and a seal at the top that encases the shank and under the head of the fastener making a complete seal from top to bottom.

  • Internal Tooth- Internal tooth have teeth on the inner dimension of the washer and the outside of the washer is smooth. They are made for fasteners who have a smaller head. When the head is fastened into the hole the internal teeth will help grab the surface, while at the same time resisting against the force of the washer being compressed.

  • External Tooth- External tooth have teeth on the outer dimension of the washer so that they can actually bite into the surface that it is put on, and the inside is still a cylindrical hole. They are designed for fasteners who have a bigger head. When the head is fastened into the hole the external teeth will help grab the surface, while at the same time resisting against the force of the washer being compressed.
    external tooth

  • Flat- Flat washers are used for basic applications, where the hole is cot directly in the center of the washer. Standard or metric, it does not matter they can accommodate all shapes and sizes.

  • Flat Retaining- These have multiple holes in them so that you can screw or bolt down the washer, and the second hole would be for running your wire to the screw or bolt.

Applicable Part numbers

A1129-ND 335-1113-ND 335-1117-ND 36-3348-ND 36-3358-ND 5205820-3-ND 36-4700-ND 36-3349-ND 36-3111-ND 36-3116-ND 36-345-ND RPC2276-ND 36-3175-ND RPC1552-ND 36-3154-ND 36-3120-ND 36-3368-ND 36-3162-ND 36-4693-ND 36-3356-ND 36-3359-ND 36-348-ND 36-3360-ND 36-3122-ND 36-3369-ND 36-3157-ND 36-2245-ND 36-346-ND 36-3123-ND 36-4692-ND 36-3119-ND 36-3118-ND 36-3127-ND 36-3370-ND 36-3347-ND 36-2246-ND 36-3364-ND 36-7235-1-ND 36-3138-ND 36-3202-ND RPC1999-ND 36-3200-ND 36-3363-ND 36-3361-ND 36-3198-ND 36-3114-ND RPC2279-ND RPC2000-ND SC1868-ND ARF1911-ND 335-1112-ND 335-1114-ND 335-1116-ND 335-1063-ND 5-1437720-3-ND 335-1115-ND 335-1121-ND H778-ND H244-ND H236-ND H240-ND H248-ND H730-ND H729-ND H734-ND H733-ND H767-ND H731-ND H735-ND H768-ND H736-ND H766-ND H772-ND H246-ND H232-ND H737-ND A35229-ND 36-3158-ND 36-3121-ND 36-3124-ND 36-3160-ND 36-3159-ND 36-3197-ND 36-3373-ND 36-3134-ND 36-3201-ND 36-3155-ND 36-3117-ND 36-3125-ND 36-3167-ND 36-3112-ND 36-3204-ND 36-3207-ND 36-3130-ND 36-3163-ND 36-3132-ND 36-3168-ND 36-3352-ND 36-3372-ND 36-3156-ND 36-3222-ND 36-3353-ND 36-3366-ND 36-3205-ND 36-3354-ND 36-3218-ND 36-3206-ND 36-3151-ND 36-3365-ND 36-3214-ND 36-1477-ND 36-3144-ND 36-7248-2-ND 36-3219-ND A101962-ND 335-1066-ND 335-1065-ND 335-1062-ND 335-1064-ND 335-1061-ND H775-ND H242-ND H238-ND H249-ND 335-1060-ND 335-1120-ND 36-3350-ND RPC2275-ND 36-7235-2-ND 36-3209-ND 36-349-ND 36-2244-ND 36-2284-ND 36-3212-ND RPC2273-ND RPC2277-ND RPC2274-ND 36-11362-5-ND RPC2278-ND RPC2001-ND RPC2002-ND RPC2286-ND SC2807-ND SC2549-ND 298-11607-ND 335-1119-ND 335-1118-ND SC1146-ND 01070602-ND H777-ND H779-ND H780-ND H728-ND H769-ND H732-ND H776-ND H773-ND H770-ND H774-ND H771-ND 36-3161-ND 36-3196-ND 36-3210-ND SC1524-ND H841-ND H839-ND H837-ND H247-ND H239-ND H838-ND H243-ND H836-ND H241-ND H840-ND H245-ND SC2530-ND 335-1168-ND 335-1167-ND 335-1169-ND 335-1166-ND 335-1170-ND 36-3165-ND RWM100A-ND 335-1067-ND RPC2986-ND RPC2984-ND RPC2983-ND RPC2985-ND RPC2989-ND RPC2992-ND RPC2994-ND RPC2990-ND RPC2987-ND RPC2988-ND RPC2991-ND 5207883-3-ND 36-7230-1-ND 5207883-2-ND RW2032A-ND RW4032A-ND FW0045B-ND RW6032A-ND FW0010A-ND FW0010B-ND FW0050B-ND RW2062A-ND RW4062A-ND 21074-3-ND 36-3113-ND 22873-1-ND 36-3149-ND FW0090A-ND FW0090B-ND NWE-34815-M6-ND 36-3129-ND 36-3150-ND 36-3164-ND 36-3170-ND RW10032A-ND RW6062A-ND RW8032A-ND 36-3367-ND 36-3152-ND FW0020A-ND FW0060A-ND 36-3126-ND 36-3171-ND FW0020B-ND 36-3194-ND 36-3203-ND RW4050A-ND 36-1476-ND MFW030B-ND 36-3135-ND 36-3166-ND 36-3172-ND 36-3131-ND 36-3141-ND 36-3208-ND MFW060A-ND RW250032A-ND RW312032A-ND FW0167A-ND FW0167B-ND 36-3153-ND 36-3215-ND 36-3357-ND 36-3128-ND FW0130A-ND FW0170A-ND FW0203A-ND FW0203B-ND FW0100A-ND RW375032A-ND FW0130B-ND FW0170B-ND 36-3115-ND FW0100B-ND MFW010A-ND 36-3174-ND FW0124A-ND FW0124B-ND 36-3136-ND 36-3142-ND 36-3195-ND 36-3221-ND RW10062A-ND RW8062A-ND 36-3148-ND 36-4699-ND 21057-2-ND 18028-2-ND FW0206A-ND FW0206B-ND 36-4703-ND 36-3180-ND 36-3187-ND 36-3173-ND 36-3179-ND 36-3186-ND RW8045A-ND FW0210A-ND FW0250A-ND 015003000503-ND FW0210B-ND FW0250B-ND RW312062A-ND RW250062A-ND FW0202A-ND FW0202B-ND FW0204A-ND FW0204B-ND 36-3178-ND 36-3133-ND 36-3145-ND 36-3169-ND 36-3176-ND 36-3182-ND FW0290A-ND 36-2248-ND 36-2247-ND 36-3216-ND 21024-1-ND 21024-2-ND 21024-5-ND RW375062A-ND RW4125A-ND 36-3211-ND FW0290B-ND FW0085A-ND FW0085B-ND 36-7248-1-ND 36-2249-ND 36-2285-ND FW0140A-ND FW0180A-ND FW0082A-ND FW0082B-ND FW0084A-ND FW0084B-ND FW0122A-ND FW0122B-ND FW0126A-ND FW0126B-ND FW0164A-ND FW0164B-ND 015204008703-ND MFW060B-ND MFW080A-ND 36-3177-ND 36-3183-ND 36-3190-ND 36-3137-ND 36-3143-ND FW0140B-ND FW0180B-ND FW0004A-ND FW0004B-ND FW0030A-ND FW0070A-ND 36-3139-ND 015104000203-ND 015205008703-ND 36-3213-ND 36-2252-ND 36-2286-ND FW0070B-ND FW0086A-ND FW0086B-ND FW0088A-ND FW0088B-ND FW0089A-ND FW0089B-ND FW0287A-ND FW0287B-ND 015004000503-ND 015005000503-ND FW0208A-ND FW0208B-ND 18025-1-ND 21024-3-ND 21026-2-ND RW437032A-ND RW500032A-ND 015002500503-ND 015202508703-ND FW0220A-ND FW0260A-ND 36-2253-ND 36-2287-ND 36-3225-ND FW0080A-ND FW0300A-ND FW0042A-ND FW0042B-ND FW0220B-ND FW0260B-ND FW0242A-ND FW0242B-ND 36-3181-ND 36-3188-ND 22873-2-ND MFW040A-ND FW0040B-ND FW0080B-ND FW0300B-ND 032030011407-ND FW0150A-ND MFW050A-ND 36-3217-ND 36-3223-ND FW0120A-ND FW0292A-ND FW0292B-ND FW0248A-ND FW0248B-ND FW0241A-ND FW0241B-ND FW0246A-ND FW0246B-ND FW0150B-ND FW0190B-ND 015206008703-ND FW0330A-ND FW0370A-ND 36-2290-ND FW0230A-ND FW0270A-ND FW0120B-ND 015106000203-ND FW0330B-ND FW0370B-ND FW0230B-ND FW0270B-ND FW0166A-ND FW0166B-ND RW500062A-ND RW437062A-ND 36-2291-ND 18025-3-ND 36-3140-ND 36-3146-ND FW0060B-ND 21075-6-ND 015006000503-ND FW0160A-ND FW0200A-ND FW0310A-ND 032040011407-ND FW0244A-ND FW0244B-ND 36-2292-ND FW0281A-ND FW0281B-ND FW0322A-ND FW0322B-ND FW0245A-ND FW0245B-ND FW0160B-ND FW0200B-ND 18027-2-ND FW0296A-ND FW0296B-ND 36-3184-ND 36-3191-ND FW0310B-ND 36-4691-ND FW0240A-ND FW0280A-ND 36-2293-ND FW0247A-ND FW0247B-ND FW0207A-ND FW0207B-ND FW0410A-ND FW0410B-ND RW7062A-ND 36-1485-ND FW0340A-ND FW0380A-ND MFW080B-ND FW0240B-ND FW0280B-ND 36-3226-ND FW0340B-ND FW0380B-ND 585010000011-ND FW0324A-ND FW0324B-ND FW0201A-ND FW0201B-ND FW0282A-ND FW0282B-ND FW0243A-ND FW0243B-ND FW0249A-ND FW0249B-ND FW0285A-ND FW0285B-ND 36-3189-ND FW0286A-ND FW0286B-ND FW0320A-ND 36-3185-ND 36-3192-ND FW0320B-ND 585020000011-ND 36-3224-ND 585030000011-ND MFW050B-ND 585040000011-ND FW0350A-ND FW0390A-ND W3-1#-ND 21023-6-ND 21074-2-ND 015008000503-ND 015108000203-ND 015208008703-ND 36-3220-ND 36-3227-ND FW0360A-ND FW0400A-ND FW0350B-ND FW0390B-ND 36-3147-ND FW0360B-ND FW0400B-ND FW0294A-ND FW0294B-ND MFW070B-ND FW0283A-ND FW0283B-ND 032050011407-ND 033030011407-ND RW875062A-ND 200503-1-ND 1-21899-4-ND FW0450A-ND FW0450B-ND 36-3193-ND FW0326A-ND FW0326B-ND RWM050A-ND 015210008703-ND RWM150A-ND 032060011407-ND 033040011407-ND 1-21899-3-ND RWM200A-ND 585060000011-ND RWM250A-ND FW0328A-ND FW0328B-ND RWM300A-ND RWM350A-ND 173000200022-ND RWM400A-ND 36-3228-ND RWM450A-ND FW0205A-ND FW0205B-ND FW0404A-ND FW0404B-ND 300141-ND 21023-4-ND 21023-7-ND 21024-6-ND 21075-4-ND RWM500A-ND 173000400022-ND P4WN-ND 1-22145-3-ND 1-21108-1-ND MFW090B-ND 21023-5-ND FW0415A-ND FW0415B-ND 033050011407-ND RWM550A-ND 18027-3-ND MFW100B-ND 21025-2-ND MFW110A-ND 18027-1-ND 21899-7-ND 21055-5-ND 173000600022-ND FW0362A-ND FW0362B-ND 21024-9-ND 21057-1-ND 18027-4-ND 21055-4-ND S2957-ND 21026-3-ND 21055-8-ND 21055-6-ND MFW120A-ND 21899-3-ND P2061SW-ND S3997-ND 032100011407-ND 033060011407-ND 18027-7-ND 21026-1-ND 21108-4-ND MFW140A-ND 22260-5-ND 21099-4-ND 21899-4-ND 21899-5-ND MFW130A-ND 185020070409-ND 21899-6-ND 36-1719-1-ND 21024-8-ND 5-1437720-2-ND 185030070409-ND 21899-1-ND SSFW14-C-ND MFW150A-ND 185040070409-ND 1-328691-2-ND 21057-4-ND 329632-ND 9-329632-0-ND SSFW38-C-ND 1-21899-5-ND 185050070409-ND MFW160A-ND MFW170A-ND 185060070409-ND 1-18028-2-ND 18025-2-ND 18025-4-ND 18027-5-ND 18027-8-ND 21025-5-ND 21899-2-ND 61060-ND 18027-9-ND CW-38-L-ND CW-56-L-ND 61090-ND 1-18027-0-ND CW-12-Q-ND SSCW14-C-ND 61120-ND SSCW38-C-ND MFW190A-ND 1-21055-2-ND CW-58-Q-ND 202079-5-ND MFW180A-ND 185080070409-ND 22145-3-ND 185100070409-ND W-1573-ND 1-21055-3-ND 0636000075-ND 0636001290-ND 0636003014-ND 0638000129-ND 0636003009-ND H250-ND SC1144-ND 205820-3-ND 205820-2-ND P10603-ND P10149SW-ND NWE-34815-M3-ND NWE-34815-M4-ND

3227 FW0360A FW0400A FW0350B FW0390B 3147 FW0360B FW0400B FW0294A FW0294B MFW070B FW0283A FW0283B 032050011407 033030011407 RW875062A 200503-1 1-21899-4 FW0450A FW0450B 3193 FW0326A FW0326B RWM050A 015210008703 RWM150A 032060011407 033040011407 1-21899-3 RWM200A 585060000011 RWM250A FW0328A FW0328B RWM300A RWM350A 173000200022 RWM400A 3228 RWM450A FW0205A FW0205B FW0404A FW0404B 300141 21023-4 21023-7 21024-6 21075-4 RWM500A 173000400022 P4WN 1-22145-3 1-21108-1 MFW090B 21023-5 FW0415A FW0415B 033050011407 RWM550A 18027-3 MFW100B 21025-2 MFW110A 18027-1 21899-7 21055-5 173000600022 FW0362A FW0362B 21024-9 21057-1 18027-4 21055-4 S2957 21026-3 21055-8 21055-6 MFW120A 21899-3 P2061 S3997 032100011407 033060011407 18027-7 21026-1 21108-4 MFW140A 22260-5 21099-4 21899-4 21899-5 MFW130A 185020070409 21899-6 1719-1 21024-8 5-1437720-2 185030070409 21899-1 SSFW14-C MFW150A 185040070409 1-328691-2 21057-4 329632 9-329632-0 SSFW38-C 1-21899-5 185050070409 MFW160A MFW170A 185060070409 1-18028-2 18025-2 18025-4 18027-5 18027-8 21025-5 21899-2 61060 18027-9 CW-38-L CW-56-L 61090 1-18027-0 CW-12-Q SSCW14-C 61120 SSCW38-C MFW190A 1-21055-2 CW-58-Q 202079-5 MFW180A 185080070409 22145-3 185100070409 W-1573 1-21055-3 0636000075 0636001290 0636003014 0638000129 0636003009 3/8 INT TH LOCK WSHR S-2207 205820-3 205820-2 P10603 P10149 NWE-34815-M3 NWE-34815-M4 1-329632-2 75801 75051 3348 3358 5205820-3 4700 3349 3111 3116 345 FW0050A 3175 MFW030A 3154 3120 3368 3162 4693 3356 3359 348 3360 3122 3369 3157 2245 346 3123 4692 3119 3118 3127 3370 3347 2246 3364 7235-1 3138 3202 MFW020A 3200 3363 3361 3198 3114 FW0190A MFW070A S10451 000-5579-NA 75601 75101 75041 75082 5-1437720-3 75031 75062 #6FWZ INTLWZ 008 INTLWZ 004 INTLWZ 006 INTLWZ 010 INT LWSS 006 INTLWSS 004 FWSS 004 FWSS 002 MFWZ 003 INTLWSS 008 FWSS 006 MFWZ 004 FWSS 008 MFWZ 002 MLWZ 003 INTLWSS 025 INT LWZ 002 FWSS 010 5205820-2 3158 3121 3124 3160 3159 3197 3373 3134 3201 3155 3117 3125 3167 3112 3204 3207 3130 3163 3132 3168 3352 3372 3156 3222 3353 3366 3205 3354 3218 3206 3151 3365 3214 1477 3144 7248-2 3219 1-329492-1 75142 75122 75102 75107 75802 MLWZ 006 LWSS 025 FWSS 025 INTLWSS 038 75602 75052 3350 FW0045A 7235-2 3209 349 2244 2284 3212 FW0030B FW0110A FW0040A 11362-5 FW0110B MFW090A MFW100A 032080011407 S17901 S10221 CW-14-L 75042 75032 S1028 D01070602 SAEFZ 004 #8FWZ #10FWZ INT LWSS 002 MFWZ 005 INTLWSS 010 SAEFZ 002 MLWZ 004 MFWZ 006 MLWZ 005 MLWZ 002 3161 3196 3210 S2207 LWZ 038 USSFZ 038 LWZ 044 INTLWSS 031 FWSS 031 LWZ 050 LWSS 031 USSFZ 044 FWSS 038 USSFZ 050 LWSS 038 P10149X 75101 HD 75122 HD 75602 HD 75082 HD 75102 HD 3165 RWM100A 75162 015203008703 015103000203 015102500203 015105000203 173000300022 173002600022 585050000011 173000500022 032120011407 033080011407 173000800022 5207883-3 7230-1 5207883-2 RW2032A RW4032A FW0045B RW6032A FW0010A FW0010B FW0050B RW2062A RW4062A 21074-3 3113 22873-1 3149 FW0090A FW0090B NWE-34815-M6 3129 3150 3164 3170 RW10032A RW6062A RW8032A 3367 3152 FW0020A FW0060A 3126 3171 FW0020B 3194 3203 RW4050A 1476 MFW030B 3135 3166 3172 3131 3141 3208 MFW060A RW250032A RW312032A FW0167A FW0167B 3153 3215 3357 3128 FW0130A FW0170A FW0203A FW0203B FW0100A RW375032A FW0130B FW0170B 3115 FW0100B MFW010A 3174 FW0124A FW0124B 3136 3142 3195 3221 RW10062A RW8062A 3148 4699 21057-2 18028-2 FW0206A FW0206B 4703 3180 3187 3173 3179 3186 RW8045A FW0210A FW0250A 015003000503 FW0210B FW0250B RW312062A RW250062A FW0202A FW0202B FW0204A FW0204B 3178 3133 3145 3169 3176 3182 FW0290A 2248 2247 3216 21024-1 21024-2 21024-5 RW375062A RW4125A 3211 FW0290B FW0085A FW0085B 7248-1 2249 2285 FW0140A FW0180A FW0082A FW0082B FW0084A FW0084B FW0122A FW0122B FW0126A FW0126B FW0164A FW0164B 015204008703 MFW060B MFW080A 3177 3183 3190 3137 3143 FW0140B FW0180B FW0004A FW0004B FW0030A FW0070A 3139 015104000203 015205008703 3213 2252 2286 FW0070B FW0086A FW0086B FW0088A FW0088B FW0089A FW0089B FW0287A FW0287B 015004000503 015005000503 FW0208A FW0208B 18025-1 21024-3 21026-2 RW437032A RW500032A 015002500503 015202508703 FW0220A FW0260A 2253 2287 3225 FW0080A FW0300A FW0042A FW0042B FW0220B FW0260B FW0242A FW0242B 3181 3188 22873-2 MFW040A FW0040B FW0080B FW0300B 032030011407 FW0150A MFW050A 3217 3223 FW0120A FW0292A FW0292B FW0248A FW0248B FW0241A FW0241B FW0246A FW0246B FW0150B FW0190B 015206008703 FW0330A FW0370A 2290 FW0230A FW0270A FW0120B 015106000203 FW0330B FW0370B FW0230B FW0270B FW0166A FW0166B RW500062A RW437062A 2291 18025-3 3140 3146 FW0060B 21075-6 015006000503 FW0160A FW0200A FW0310A 032040011407 FW0244A FW0244B 2292 FW0281A FW0281B FW0322A FW0322B FW0245A FW0245B FW0160B FW0200B 18027-2 FW0296A FW0296B 3184 3191 FW0310B 4691 FW0240A FW0280A 2293 FW0247A FW0247B FW0207A FW0207B FW0410A FW0410B RW7062A 1485 FW0340A FW0380A MFW080B FW0240B FW0280B 3226 FW0340B FW0380B 585010000011 FW0324A FW0324B FW0201A FW0201B FW0282A FW0282B FW0243A FW0243B FW0249A FW0249B FW0285A FW0285B 3189 FW0286A FW0286B FW0320A 3185 3192 FW0320B 585020000011 3224 585030000011 MFW050B 585040000011 FW0350A FW0390A W3-1# 21023-6 21074-2 015008000503 015108000203 015208008703 3220


#4

That was nice info. Thanks:smile: