1/4-20 Key Locking Inserts

Key Locking Inserts, also commonly known by their trade-names Keensert®, Keysert®, Loksert®, etc., are internally and externally threaded inserts with vertical keys attached to the top on the insert. They are installed by being screwed into a pre-drilled and pre-tapped hole, and during installation the keys are driven into the tapped threads of the parent to provide a positive mechanical lock. They are used to repair stripped or damaged threads or to provide reinforcement in a weak parent material.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
CenturyFLKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-20ms51831-102l () () () () () () () () () () () ()332
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CenturyFLKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20ms51830-106 insert scr thd(keylkd) .250-20 x .375l cres (INSERTSCR THD(KEYLKD) .250-20 X .375LCRES) (INSERT SCR THD(KEYLKD) .250-20 X .375L CRES) () () () () () () () () () ()42
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CenturyFLKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-20ms51830-106l () () () () () () () () () () () ()10
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CenturyFLKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated1/4-20ms51831-102 () () () () () () () () () () () ()13
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CenturyFLKey Locking Insert (Keensert, Keysert etc.)1/4-20ms51832-102l 1/4-20 hvy duty () () () () () () () () () () () ()5
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HayesCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3/8-161/4-20 x 3/8-16 lock keylock insert 18-8ss dfl10
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HayesCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 7/16-141/4-20 x 7/16-14 lock keylock ins 18-8ss dfl381
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SWACOOHKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-20ms51831-102l locking insert 1/4-2027
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SWACOOHKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated1/4-20ms51831-102 1/4-20 insert 304ss500
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GlobalCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20ms51830-106 locking insert military ss/pa 1/4-20 thd internal x 0.370 l x 3/8-16 external thin wall 1/4-20 thd internal x 0.370 l x 3/8-16 external thin wall 1/4-20 thd internal x 0.370 l x 3/8-16 external thin wall25
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EndriesWIKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 7/16-141/4-20x7/16-14 keensert 18-8 3043
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ManscoMIKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 7/16-141/4-20 x 7/16-14 heavywall keysert s.s.129
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Jay-CeeMIKey Locking Insert (Keensert, Keysert etc.)1/4-20 x 7/16 141/4-20x7/16-14 hd-cs10
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Jay-CeeMIKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3/8 161/4-20x3/8-16 tw-ss80
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Jay-CeeMIKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 7/16 141/4-20x7/16-14 hd-ss100
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Jay-CeeMIKey Locking Insert (Keensert, Keysert etc.)1/4-20 x 3/8 161/4-20x3/8-16 tw-csinquire
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .371/4-20 x .37 locking knsert 3/8-16 303sst ()20
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .371/4-20 x .37 kylk ins 3/8-16 303sst dfl () ()909
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .621/4-20 x .62 blind knsert 3/8-16 303sst () ()549
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)Superalloy (Inconel, Hastelloy, Alloy 20)Plain1/4-20 x .371/4-20 x .37 locking kylk ins 3/8-16 a286 () ()199
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RCFastAZKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated1/4-20ms51831-102 insert, screw thrd, 1/4-20, 7/16-14 x 3/8l ss84
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)1/4-20 x .371/4-20 x .37 kylk ins 3/8-16 nit60 ()141
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .371/4-20 x .37 kylk ins 1/2-13 303sst ()69
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)1/4-20 x .371/4-20 x .37 locking kylk ins 3/8-16 ()610
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)1/4-20 x .37 31/4-20 x .37 knsert 3/8-16 nit-60 ()948
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .371/4-20 x .37 locking knsert 1/2-13 303sst3
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SWACOOHKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-20ms51830-106 insert keylock13
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EBN IndusINKey Locking Insert (Keensert, Keysert etc.)1/4-20 x 7/16-14 x .371/4-20 x 7/16-14 x .37 hvy duty keysert6
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AbabaCAKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-201/4-20 i.d. x 7/16-14 o.d. heavy duty stl keyserts (#73042)15
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AIHAZKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-20insert s/s MS51830-106L2
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AIHAZKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-20insert screw-thread MS51830-1061
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AIHAZKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated1/4-201/4-20 insert 304ss MS51831-1024
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AIHAZKey Locking Insert (Keensert, Keysert etc.)Superalloy (Inconel, Hastelloy, Alloy 20)Plain1/4-201/4-20 locking insert nitronic 6050
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AIHAZKey Locking Insert (Keensert, Keysert etc.)Superalloy (Inconel, Hastelloy, Alloy 20)Plain1/4-201/4-20 locking insert nitronic 6050
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)Superalloy (Inconel, Hastelloy, Alloy 20)Plain1/4-20 x .37 7/16-141/4-20 x .37 keensert 7/16-14 nitronic-601827
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-201/4-20 keensert 3/8-16 thd 303 ss locking4
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .371/4-20 x .37 kylk ins 7/16-14 303sst4016
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .371/4-20 x .37 kylk ins 7/16-14 303sst971
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)1/4-20 x .371/4-20 x .37 kylk ins 7/16-14 nit601990
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .371/4-20 x .37 kylk ins 3/8-16 303sst620
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)1/4-20 x .37 71/4-20 x .37 hvy knsert 7/16-14 carbon1
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)1/4-20 x .371/4-20 x .37 locking kylk ins 7/16-142
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .37 71/4-20 x .37 knsert 7/16-14 303sst310
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-201/4-20 keensert 3/8-16 thd 303 ss545
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HewesNYKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 3/81/4-20x 3/8 insert 303 s/sless nylon patch10
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