AT Screw / Thread Inserts & Kits
Alfa Tools thread inserts and repair kits offer permanent solutions for restoring stripped, damaged, or worn threads in aluminum, magnesium, cast iron, and other soft metals. Whether you’re fixing stripped spark plug threads, reinforcing aluminum manifolds, or repairing damaged fastener holes, our comprehensive selection includes helical coil (wire thread) inserts, solid screw inserts, NPT pipe thread inserts, and complete repair kits with installation tools. These thread inserts create threads stronger than the original material, prevent future thread damage, and enable the use of standard fasteners in soft metals without the risk of stripping.
Alfa Tools SI67501 4-40 NC SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67501
MPN: SI67501
Alfa Tools SI67502 6-32 NC SOLID THREAD INSERTS - Std Qty Pack 10
SKU: AT-SI67502
MPN: SI67502
Alfa Tools SI67503 8-32 NC SOLID THREAD INSERTS - Std Qty Pack 10
SKU: AT-SI67503
MPN: SI67503
Alfa Tools SI67504 10-24 NC SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67504
MPN: SI67504
Alfa Tools SI67505 1/4-20 NC SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67505
MPN: SI67505
Alfa Tools SI67506 5/16-18 NC SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67506
MPN: SI67506
Alfa Tools SI67507 3/8-16 NC SOLID THEAD INSERT - Std Qty Pack 10
SKU: AT-SI67507
MPN: SI67507
Alfa Tools SI67508 7/16-14 NC SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67508
MPN: SI67508
Alfa Tools SI67509 1/2-13 NC SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67509
MPN: SI67509
Alfa Tools SI67510 9/16-12 NC SOLID THREAD INSERT - Std Qty Pack 5
SKU: AT-SI67510
MPN: SI67510
Alfa Tools SI67511 5/8-11 NC SOLID THREAD INSERT - Std Qty Pack 5
SKU: AT-SI67511
MPN: SI67511
Alfa Tools SI67512 5/8-11 NC SOLID THREAD INSERT - Std Qty Pack 5
SKU: AT-SI67512
MPN: SI67512
Alfa Tools SI67513 3/4-10 NC SOLID THREAD INSERT - Std Qty Pack 5
SKU: AT-SI67513
MPN: SI67513
Alfa Tools SI67514 7/8-9 NC SOLID THREAD INSERT - Std Qty Pack 5
SKU: AT-SI67514
MPN: SI67514
Alfa Tools SI67515 1-8 NC SOLID THREAD INSERT - Std Qty Pack 5
SKU: AT-SI67515
MPN: SI67515
Alfa Tools SI67521 10-32 NF SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67521
MPN: SI67521
Alfa Tools SI67522 1/4-28 NF SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67522
MPN: SI67522
Alfa Tools SI67523 5/16-24 NF SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67523
MPN: SI67523
Alfa Tools SI67524 3/8-24 NF SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67524
MPN: SI67524
Alfa Tools SI67525 7/16-20 NF SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67525
MPN: SI67525
Alfa Tools SI67526 1/2-20 NF SOLID THREAD INSERT - Std Qty Pack 10
SKU: AT-SI67526
MPN: SI67526
Alfa Tools SI67527 9/16-18 NF SOLID THREAD INSERT - Std Qty Pack 5
SKU: AT-SI67527
MPN: SI67527
Alfa Tools SI67528 5/8-18 NF SOLID THREAD INSERT - Std Qty Pack 5
SKU: AT-SI67528
MPN: SI67528
Alfa Tools SI67529 3/4-16 NF SOLID THREAD INSERT - Std Qty Pack 5
SKU: AT-SI67529
MPN: SI67529