Inserts & Kits, Inc. – Your answer in thread repair.

With well over 40+ years experience, Inserts & Kits, Inc. is an industry leader in thread repair products. We are dedicated to providing superior product to our future and existing customers.

At Inserts and Kits, Inc., we pride ourselves on producing a quality product, with prompt, courteous service and providing our customers with reasonable prices.

Service, Integrity and Commitment to our customer is always our first priority.

Our entire inventory is fully traceable and certified. Many of our orders ship out the same day the order was placed. Let Inserts & Kits, Inc. help you with all your threaded inserts needs.


Inserts and Kits, Inc. offers innovative manufacturers the opportunity to design high quality products using lighter weight metals as well as standard materials. Coil-Sert® inserts can be used in aluminum and magnesium alloys, carbon fibres and other materials to achieve stronger and more reliable threads than the parent material alone. Coil-Sert® brand inserts are widely used by manufacturers in a variety of markets including the following:




Coil-Sert® and Tangless® Inserts are precision engineered and have been put through rigorous torque, tension and vibration tests as well as comprehensive dimensional inspections and metallurgical analysis in attaining their MIL-Spec qualifications. Inserts have been thoroughly tested by an independent testing laboratory and are certified to conform to NASM8846. Copies of these reports are available upon request. In addition, Coil-Sert® Kits Inserts and Tools are in conformance with the following military standards and other specifications:

Unified Thread Sizes
AS/NASM Standards Standards Coverage
AS7245 Insert, Screw Thread,
Helical Coil, Corrosion Resistant Steel
NASM8846 Insert, Screw Thread
Helical Coil – Procurement Spec
AS5272 Dry Film Lubricant (Type I)
Optional coating
A-A-59158 Tools for Inserting
and Extracting Helical
Coil Inserts
NASM122076 Series Insert, Corrosion Resistant
Helical Coarse Thread
NASM124651 Series Insert, Corrosion Resistant
Helical Fine Thread
& NASM124651
Insert-Screw Thread Free Running
NASM21209 Insert-Screw Thread Screw-Locking
NASM33537 Assembly and Dimensions, Helical Coil Insert
NAS1130 Tangless Inserts, Free-Running and Locking
QQ-P-416 Cadmium Plating (Type II) – Optional coating
Metric Thread Sizes
MA Standards Standards Coverage
NA0276 Inserts, Screw Thread, Helical Coil, Free-Running and Self-Locking, Tangless, Metric
MA1565 Procurement Standard, Metric Helical Insert
MA1567 Assembly Dimensions, Metric Helical Coil Insert
MA3279 Inserts, Metric, Free-Running, Helical Coil, Uncoated
MA3280 Inserts, Metric, Free-Running, Helical Coil, Lubricated
MA3281 Inserts, Metric, Free-Running, Helical Coil, Cadmium Plated
MA3329 Inserts, Metric, Locking, Helical Coil, Uncoated
MA3330 Inserts, Metric, Locking Helical Coil, Lubricated
MA3331 Inserts, Metric Locking, Helical Coil, Cadmium Plated