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    3,626 Products
    About Threaded Inserts
    industrial info icon

    Choose the right threaded insert for your application and learn how to install it securely.

    Screw-Locking Seize-Resistant Key-Locking Threaded Inserts for Soft Metal

    Image of Product. Bottom orientation. Threaded Inserts. Screw-Locking Seize-Resistant Key-Locking Threaded Inserts for Soft Metal.
    Create the tightest hold in aluminum and other soft metal without screws sticking. The lubricant on these inserts eases installation, and the irregularly shaped threads won’t let screws back out from vibration. Inserts have keys that drive into material to prevent them from slipping or rotating in the hole.
    To install, drill and tap a hole in your material. Then, thread the insert onto the installation tool and screw it into the hole. Place the tool over the keys and hit it with a hammer to drive them in.
    Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.
    Thin Wall—Use these inserts near the edge of workpieces or wherever you only have space for a small hole. They're also lighter than standard and extra-thick wall inserts for applications with strict weight limitations.
    Dry-Film-Lubricated Cadmium-Plated Steel—The plating creates a barrier against rust.
    Dry-Film-Lubricated 18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Inserts
    Installation
    Tools
    Thread Size
    For Tap Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    No. of Locking
    Keys
    Specs. Met
    Each
    Each
    Standard Wall
     
    Dry-Film-Lubricated Cadmium-Plated Steel
    10-24
    		3/8"-16
    		0.313"Q
    		0.332"2MS51831A101L97255A24600000093904A515000000
    10-32
    		3/8"-16
    		0.313"Q
    		0.332"2MS51831A201L, NAS1395-3L97255A24700000———0
    1/4"-20
    		7/16"-14
    		0.375"X
    		0.397"2MS51831A102L97255A2480000093904A52500000
    5/16"-18
    		1/2"-13
    		0.438"29/64"
    		0.453"4MS51831A103L97255A2490000093904A53500000
    5/16"-24
    		1/2"-13
    		0.438"29/64"
    		0.453"4MS51831A203L97255A25100000———0
    3/8"-16
    		9/16"-12
    		0.500"33/64"
    		0.516"4MS51831A104L97255A2520000093904A54500000
    3/8"-24
    		9/16"-12
    		0.500"33/64"
    		0.516"4MS51831A204L97255A25300000———0
    7/16"-14
    		5/8"-11
    		0.625"37/64"
    		0.578"4MS51831A105L97255A2540000093904A73900000
    7/16"-20
    		5/8"-11
    		0.625"37/64"
    		0.578"4MS51831A205L97255A25500000———0
    1/2"-13
    		11/16"-11
    		0.688"41/64"
    		0.641"4MS51831A106L97255A2560000093904A55500000
    1/2"-20
    		11/16"-11
    		0.688"41/64"
    		0.641"4MS51831A206L97255A25700000———0
    3/4"-10
    		1 1/8"-12
    		1.250"1 1/16"
    		1.063"4MS51831A109L97255A2630000093904A748000000
    M16 x 1.5 mmM22 x 1.5 mm22 mm20.5 mm
    		20.5 mm4NA0150E16097255A3330000093904A79400000
    M16 x 2 mmM22 x 1.5 mm22 mm20.5 mm
    		20.5 mm4—97255A3320000093904A79400000
    M24 x 3 mmM33 x 2 mm33 mm31 mm
    		31 mm4—97255A33800000093904A79800000
     
    Dry-Film-Lubricated 18-8 Stainless Steel
    8-32
    		5/16"-18
    		0.313"I
    		0.272"2NAS1395C08L97255A129000093904A50500000
    10-24
    		3/8"-16
    		0.313"Q
    		0.332"2MS51831-101L97255A131000093904A51500000
    10-32
    		3/8"-16
    		0.313"Q
    		0.332"2NAS1395C3L97255A1320000———0
    1/4"-20
    		7/16"-14
    		0.375"X
    		0.397"2MS51831-102L97255A133000093904A52500000
    1/4"-28
    		7/16"-14
    		0.375"X
    		0.397"2NAS1395C4L97255A1340000———0
    5/16"-18
    		1/2"-13
    		0.438"29/64"
    		0.453"4MS51831-103L97255A135000093904A53500000
    5/16"-24
    		1/2"-13
    		0.438"29/64"
    		0.453"4NAS1395C5L97255A1360000———0
    3/8"-16
    		9/16"-12
    		0.500"33/64"
    		0.516"4MS51831-104L97255A137000093904A54500000
    3/8"-24
    		9/16"-12
    		0.500"33/64"
    		0.516"4NAS1395C6L97255A1380000———0
    7/16"-14
    		5/8"-11
    		0.625"37/64"
    		0.578"4MS51831-105L97255A1390000093904A73900000
    1/2"-13
    		11/16"-11
    		0.688"41/64"
    		0.641"4MS51831-106L97255A1420000093904A55500000
    1/2"-20
    		11/16"-11
    		0.688"41/64"
    		0.641"4NAS1395C8L97255A14300000———0
    5/8"-11
    		7/8"-14
    		0.875"53/64"
    		0.828"4MS51831-108L97255A1460000093904A74600000
    3/4"-10
    		1 1/8"-12
    		1.250"1 1/16"
    		1.063"4MS51831-109L97255A1480000093904A748000000
    7/8"-9
    		1 1/4"-12
    		1.375"1 3/16"
    		1.188"4MS51831-110L97255A1510000093904A751000000
    7/8"-14
    		1 1/4"-12
    		1.375"1 3/16"
    		1.188"4MS51831-210L97255A15200000———0
    1"-8
    		1 3/8"-12
    		1.500"1 5/16"
    		1.313"4MS51831-111L97255A1530000093904A753000000
    M4 x 0.7 mmM8 x 1.25 mm8 mm6.9 mm
    		6.9 mm2—97255A2210000093904A78600000
    M5 x 0.8 mmM10 x 1.25 mm10 mm8.8 mm
    		8.8 mm2—97255A2220000093904A78700000
    M6 x 1 mmM12 x 1.25 mm12 mm10.8 mm
    		10.8 mm2—97255A2230000093904A78800000
    M8 x 1 mmM14 x 1.5 mm14 mm12.8 mm
    		12.8 mm4—97255A2240000093904A78900000
    M8 x 1.25 mmM14 x 1.5 mm14 mm12.8 mm
    		12.8 mm4—97255A2250000093904A78900000
    M10 x 1.25 mmM16 x 1.5 mm16 mm14.75 mm
    		14.75 mm4—97255A1790000093904A79100000
    M10 x 1.5 mmM16 x 1.5 mm16 mm14.75 mm
    		14.75 mm4—97255A1960000093904A79100000
    M12 x 1.75 mmM18 x 1.5 mm18 mm16.75 mm
    		16.75 mm4—97255A1980000093904A79200000
    M16 x 2 mmM22 x 1.5 mm22 mm20.5 mm
    		20.5 mm4—97255A2130000093904A79400000
     
    Thin Wall
     
    Dry-Film-Lubricated Cadmium-Plated Steel
    2-56
    		8-32
    		0.125"29 Ga.
    		0.134"2MS51830A101L97255A2260000093904A15000000
    4-40
    		10-32
    		0.172"20 Ga.
    		0.161"2MS51830A102L97255A2270000093904A25000000
    6-32
    		12-28
    		0.172"3/16"
    		0.187"2MS51830A103L97255A2280000093904A35000000
    8-32
    		1/4"-28
    		0.219"1 Ga.
    		0.228"2MS51830A104L97255A2290000093904A45000000
    10-32
    		5/16"-18
    		0.313"I
    		0.272"2MS51830A201L, NAS1394-3L97255A2320000———0
    1/4"-20
    		3/8"-16
    		0.375"Q
    		0.332"2MS51830A106L97255A233000093904A61500000
    1/4"-28
    		3/8"-16
    		0.375"Q
    		0.332"2MS51830A202L, NAS1394-4L97255A2340000———0
    1/4"-28
    		7/16"-14
    		0.375"X
    		0.397"2MS51831A202L, NAS1395-4L97255A23500000———0
    3/8"-16
    		1/2"-13
    		0.500"29/64"
    		0.453"4MS51830A108L97255A238000093904A63500000
    3/8"-24
    		1/2"-13
    		0.500"29/64"
    		0.453"4MS51830A204L, NAS1394-6L97255A2390000———0
    1/2"-13
    		5/8"-11
    		0.625"37/64"
    		0.578"4MS51830A110L97255A2430000093904A64500000
    1/2"-20
    		5/8"-11
    		0.625"37/64"
    		0.578"4MS51830A206L, NAS1394-8L97255A24400000———0
    M2 x 0.4 mmM4 x 0.7 mm3 mm3.4 mm
    		3.4 mm2—97255A2940000094010A41500000
    M3 x 0.5 mmM5 x 0.8 mm4.25 mm4.4 mm
    		4.4 mm2NA0146E03097255A2960000094010A43500000
    M4 x 0.7 mmM6 x 0.75 mm5.25 mm5.5 mm
    		5.5 mm2NA0146E04097255A2970000094010A44500000
    M5 x 0.5 mmM8 x 1.25 mm8 mm6.9 mm
    		6.9 mm2—97255A2990000093904A77900000
    M5 x 0.8 mmM8 x 1.25 mm8 mm6.9 mm
    		6.9 mm2NA0146E05097255A2980000093904A77900000
    M6 x 1 mmM10 x 1.25 mm10 mm8.8 mm
    		8.8 mm2NA0146E06097255A3110000093904A78100000
    M8 x 1.25 mmM12 x 1.25 mm12 mm10.8 mm
    		10.8 mm4—97255A3130000093904A78200000
    Screw-Locking Key-Locking Insert with Thin Wall, Cadmium Plated Steel, M8 x 1.25 mm Thread
    EachShips in 1-3 weeks
    Compatible Products for This Threaded Insert
    M10 x 1.5 mmM14 x 1.5 mm14 mm12.8 mm
    		12.8 mm4—97255A3150000093904A78300000
     
    Dry-Film-Lubricated 18-8 Stainless Steel
    2-56
    		6-40
    		0.109"31 Ga.
    		0.118"2—97255A1120000093904A71100000
    2-56
    		8-32
    		0.125"29 Ga.
    		0.134"2MS51830-101L97255A111000093904A15000000
    4-40
    		10-32
    		0.172"20 Ga.
    		0.161"2MS51830-102L97255A113000093904A25000000
    6-32
    		12-28
    		0.172"3/16"
    		0.187"2MS51830-103L97255A114000093904A35000000
    8-32
    		1/4"-28
    		0.219"1 Ga.
    		0.228"2MS51830-104L97255A115000093904A45000000
    10-24
    		5/16"-18
    		0.313"I
    		0.272"2MS51830-105L97255A116000093904A60500000
    10-32
    		5/16"-18
    		0.313"I
    		0.272"2MS51830-201L, NAS1394C3L97255A1170000———0
    1/4"-20
    		3/8"-16
    		0.375"Q
    		0.332"2MS51830-106L97255A118000093904A61500000
    1/4"-28
    		3/8"-16
    		0.375"Q
    		0.332"2MS51830-202L, NAS1394C4L97255A1190000———0
    5/16"-18
    		7/16"-14
    		0.438"X
    		0.397"4MS51830-107L97255A121000093904A62500000
    5/16"-24
    		7/16"-14
    		0.438"X
    		0.397"4MS51830-203L, NAS1394C5L97255A1220000———0
    3/8"-16
    		1/2"-13
    		0.500"29/64"
    		0.453"4MS51830-108L97255A123000093904A63500000
    3/8"-24
    		1/2"-13
    		0.500"29/64"
    		0.453"4MS51830-204L, NAS1394C6L97255A1240000———0
    7/16"-14
    		9/16"-12
    		0.563"33/64"
    		0.516"4MS51830-109L97255A1250000093904A72500000
    7/16"-20
    		9/16"-12
    		0.563"33/64"
    		0.516"4MS51830-205L, NAS1394C7L97255A12600000———0
    1/2"-13
    		5/8"-11
    		0.625"37/64"
    		0.578"4MS51830-110L97255A1270000093904A64500000
    1/2"-20
    		5/8"-11
    		0.625"37/64"
    		0.578"4MS51830-206L, NAS1394C8L97255A12800000———0
    M2 x 0.4 mmM4 x 0.7 mm3 mm3.4 mm
    		3.4 mm2—97255A1810000094010A41500000
    M2.5 x 0.45 mmM4.5 x 0.75 mm3.81 mm3.9 mm
    		3.9 mm2—97255A1820000094010A42500000
    M3 x 0.5 mmM5 x 0.8 mm4.25 mm4.4 mm
    		4.4 mm2—97255A1830000094010A43500000
    M4 x 0.7 mmM6 x 0.75 mm5.25 mm5.5 mm
    		5.5 mm2—97255A1840000094010A44500000
    M5 x 0.5 mmM8 x 1.25 mm8 mm6.9 mm
    		6.9 mm2—97255A1890000093904A77900000
    M5 x 0.8 mmM8 x 1.25 mm8 mm6.9 mm
    		6.9 mm2—97255A1910000093904A77900000
    M6 x 0.75 mmM10 x 1.25 mm10 mm8.8 mm
    		8.8 mm2—97255A1920000093904A78100000
    M6 x 1 mmM10 x 1.25 mm10 mm8.8 mm
    		8.8 mm2—97255A1930000093904A78100000
    M8 x 1.25 mmM12 x 1.25 mm12 mm10.8 mm
    		10.8 mm4—97255A1950000093904A78200000
    M10 x 1.5 mmM14 x 1.5 mm14 mm12.8 mm
    		12.8 mm4—97255A1860000093904A78300000
    M12 x 1.75 mmM16 x 1.5 mm16 mm14.75 mm
    		14.75 mm4—97255A1880000093904A78400000
     
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    Other Threaded Inserts
    Helical Inserts
    Key-Locking Inserts
    Heat-Set Inserts
    Tapping Inserts
    Press-In Inserts
    Hammer-In Inserts