KATO Fastening Systems, Inc.

MA/MS/NAS Specs

Military, Commercial & Aerospace Specifications

Kato Tangless and Tanged CoilThread Inserts are precision-engineered products that have been put through rigorous torque, tension, and vibration test; as well as comprehensive dimensional inspections, and metallurgical analysis in attaining their MIL-Spec qualifications.

Kato CoilThread Inserts have been thoroughly tested by an independent testing laboratories and are certified to conform to NASM8846 (MIL-I-8846). A copy of these reports are available by contacting the Kato Tech-Group.

In addition, CoilThread Inserts and Tools are in conformance with the following military standards and other specifications listed below.

Unified Thread Sizes

AS/MS/NAS Standards	New AS/NASM Standards	Standards Coverage
AS7245	unchanged	Insert, Screw Thread, Helical Coil, Corrosion Resistant Steel
MIL-I-8846	NASM8846	Inserts, Screw Thread, Helical Coil - Procurement Spec
MIL-L-46010	AS5272	Dry Film Lubricant (Type I) - Optional coating.
MIL-T-21309	A-A-59158	Tools for Inserting and Extracting Helical Coil Inserts
MS122076 series	NASM122076 series	Insert, Corrosion Resistant Helical Coarse Thread
MS124651 series	NASM124651 series	Insert, Corrosion Resistant Helical Fine Thread
MS21208*	NASM122076 & NASM124651	Insert-Screw Thread Free Running
MS21209	NASM21209	Insert-Screw Thread Screw-Locking
MS33537	NASM33537	Assembly and Dimensions, Helical Coil Insert
NAS1130	unchanged	Tangless Inserts, Free-Running and Locking
QQ-P-416	unchanged	Cadmium Plating (Type II) - Optional coating

* MS21208 was superseded by MS122076 & MS124651 series, and subsequently superseded by NASM122076 & NASM124651 series.

Metric Thread Sizes

MA Standards	Standards Coverage
MA1565	Procurement Standard, Metric Helical Coil 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

Special Notes:

The Military Standard (MS) drawings covering Unified size Tanged inserts have been superseded by National Aerospace Standard drawings (NAS) with an "M" suffix designating that it was previously a military drawing. Following are the affected standards:

NASM122076-122115, NASM122116-122155, NASM122156-122195, NASM122196-122235, NASM122236-122275, NASM124651-124690, NASM124691-124730, NASM124731-124770, NASM124771-124810, NASM124811-124850, NASM21209, and NASM8846.

Specification MS33537 covering installation dimensions has now been superseded by NASM33537 standard.
*MS21208 has for some time been superseded by MS122076 & MS124651 series. Although CoilThread inserts conform to MS21208 all documentation and certification denotes the current standards (NASM122076 & NASM124651 series) and not MS21208 for particular part numbers. MS21208 is only referenced in the Certificate of Compliance (C of C).
Sound confusing? It isn't really. For Example: Specification MS21209 is now NASM21209, and MS122076-MS122115 is now NASM122076-NASM122115.
The good news is that the individual part numbers on the new NASM drawings did not change. They still carry the MS prefix. For Example: MS21209-C0415 remains unchanged, and MS122076 remains MS122076.
If you have any questions please contact the KATO Tech-Group for clarification.

Due to Copyright Laws it is not legal to distribute or publish military & aerospace standards on our website. Technical and dimensional information in these standards are available in the Tech Info section of our website and in our catalog. To obtain a hard copy of our catalog please fill out our Customer Request Form, or for more information contact the KATO Tech-Group, and we will be happy to assist you.