FCH News

1/4 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.

56 results, (click on any line for more information)

Buy Key Locking Inserts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
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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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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CenturyFLKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-28 x 3/8nas1394c4l 54
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HayesCAKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-28 x 3/8nas1394c4l 1/4-28 x 3/8-16 key lkd insert ss44
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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 303sst () ()3
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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.)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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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-28 x .371/4-28 x .37 kylk ins 1/2-13 303sst () ()16
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)1/4-28 x .3751/4-28 x .375 locking kylk ins 3/8-16 4140 () ()32
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)1/4-28 x .401/4-28 x .40 flting knsert 1/2-20 () ()2
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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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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.)SteelPlain1/4-28 x 7/16ms51831-202l keylock insert50
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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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Bostwick INKey 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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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x .37 locking keensert 3/8-16 303sst20
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AbabaCAKey Locking Insert (Keensert, Keysert etc.)1/4 x 61/4 & m6 keysert installation tool (#72250)2
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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-ss30
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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.)1/4-28 x 3/8 161/4-28x3/8-16 tw-csinquire
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Jay-CeeMIKey Locking Insert (Keensert, Keysert etc.)1/4-28 x 7/16 141/4-28x7/16-14 hd-csinquire
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Jay-CeeMIKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-28 x 3/8 161/4-28x3/8-16 tw-ssinquire
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Jay-CeeMIKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-28 x 7/16 141/4-28x7/16-14 hd-ssinquire
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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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Jay-CeeMIKey Locking Insert (Keensert, Keysert etc.)1/4-20 x 3/8 161/4-20x3/8-16 tw-cs175
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Jay-CeeMIKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 extra hvy duty threaded insert keensert (1/4-20id 1/2-13od 3/8long) s/sinquire
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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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CenturyFLKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-28ms51830-202 349
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CenturyFLKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-20ms51831-102l 307
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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.)SteelPlain1/4-28ms51831-202 8
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CenturyFLKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-28 x 7/16 14ms51831-202l 4
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CenturyFLKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-28ms51830-202l 111
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CenturyFLKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-28 86ms51830ca202l 44
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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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BHAMALKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-28keensert MS51830-202L4
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BHAMALKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-28keensert MS51830-202L4
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QFCTXKey Locking Insert (Keensert, Keysert etc.)BrassPlain1/4-20131/4-2013m brass insert type ki45
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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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LibertyILKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-281/4-28 unjf-3b insert key locked to ms51830-202l5
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SWACOOHKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-28ms51830-202 insert45
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SWACOOHKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-20ms51831-102l locking insert 1/4-2027
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AIHAZKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-28insert MS51830-20230
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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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BossardAZKey Locking Insert (Keensert, Keysert etc.)SteelPlaininsert-non locking ms51830-2021
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OlanderCAKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 keensert 3/8-16 thread 303 ss locking4
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RapidNYKey Locking Insert (Keensert, Keysert etc.)SteelPassivated1/4-28insert screw thread locked-in cres 303 .250-28 unjf-3b x .375 lg. passivated MS51830-202L10
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CenturyNYKey Locking Insert (Keensert, Keysert etc.)300 Stainless (A1,A2, 18-8,304,310 etc.)Plainms51830-106 insert scr thread(keylkd) .250-20 x .375l cres42
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QCSORKey Locking Insert (Keensert, Keysert etc.)SteelPlain1/4-281/4-28 int x 3/8-16 ext solid insert ss ms51830-20250
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