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Metric Keensert® Cross Reference - 4140 Alloy, A286, & Mil-Spec

Here at MF Supply, we are a distributor for the most popular Metric Keensert® style inserts. One of our special skills is providing functional equivalents to expensive brand name fasteners including: Acme, Alcoa, Boeing, Carr-Lane, Camloc, Chrislynn, Clarendon, Fairchild, Howmet, Jergens, Kaynar, McMaster-Carr, Microdot and Tridair Keensert® and Keysert style inserts. This helps our customers save money and reduce long lead times.

Trademark Notice & Disclaimer

KEENSERTS® is a registered trademark of Huck Patents, Inc. and Howmet Aerospace Inc. MF Supply is an independent distributor not affiliated with or endorsed by the trademark owners. Any reference to KEENSERTS® is strictly for descriptive compatibility and cross-referencing. Unless explicitly noted, products offered are functionally equivalent alternatives, not original KEENSERTS® brand inserts.

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METRIC MINIATURE INSERTS - NON-LOCKING - 4140 ALLOY STEEL (NA0146 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0146-020 80382 KNCM 2x0.4MX M2 x 0.4 M4 x 0.7 3 4140 ALLOY View Product
- NA0146-025 80383 KNCM 2.5x0.45MX M2.5 x 0.45 M4.5 x 0.75 3.81 4140 ALLOY View Product
- NA0146-030 80384 KNCM 3x0.5MX M3 x 0.5 M5 x 0.8 4.25 4140 ALLOY View Product
- NA0146-040 80386 KNCM 4x0.7MX M4 x 0.7 M6 x 0.75 5.25 4140 ALLOY View Product
METRIC THIN WALL INSERTS - NON-LOCKING - 4140 ALLOY STEEL (NA0148 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0148-050 80351 KNM 5x0.8MX M5 x .8 M8 x 1.25 8 4140 ALLOY View Product
- NA0148-060 80352 KNM 6x1.0MX M6 x 1 M10 x 1.25 10 4140 ALLOY View Product
- - 80353 KNM 8x1.25MX M8 x 1.25 M12 x 1.25 12 4140 ALLOY View Product
- NA0148-080 80553 KNM 8x1.0MX M8 x 1 M12 x 1.25 12 4140 ALLOY View Product
- - 80355 KNM 10x1.5MX M10 x 1.5 M14 x 1.5 14 4140 ALLOY View Product
- NA0148-100 80555 KNM 10x1.25MX M10 x 1.25 M14 x 1.5 14 4140 ALLOY View Product
- - 80356 KNM 12x1.75MX M12 x 1.75 M16 x 1.5 16 4140 ALLOY View Product
- NA0148-120 80556 KNM 12x1.25MX M12 x 1.25 M16 x 1.5 16 4140 ALLOY View Product
METRIC HEAVY DUTY INSERTS - NON-LOCKING - 4140 ALLOY STEEL (NA0150 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0150-040 80363 KNHM 4x0.7MX M4 x .7 M8 x 1.25 8 4140 ALLOY View Product
- NA0150-050 80364 KNHM 5x0.8MX M5 x .8 M10 x 1.25 10 4140 ALLOY View Product
- NA0150-060 80365 KNHM 6x1MX M6 x 1 M12 x 1.25 12 4140 ALLOY View Product
- - 80366 KNHM 8x1.25MX M8 x 1.25 M14 x 1.5 14 4140 ALLOY View Product
- NA0150-080 80566 KNHM 8x1MX M8 x 1 M14 x 1.5 14 4140 ALLOY View Product
- - 80367 KNHM 10x1.5MX M10 x 1.5 M16 x 1.5 16 4140 ALLOY View Product
- NA0150-100 80567 KNHM 10x1.25MX M10 x 1.25 M16 x 1.5 16 4140 ALLOY View Product
- - 80369 KNHM 12x1.75MX M12 x 1.75 M18 x 1.5 18 4140 ALLOY View Product
- NA0150-120 80569 KNHM 12x1.25MX M12 x 1.25 M18 x 1.5 18 4140 ALLOY View Product
- - 80370 KNHM 14x2MX M14 x 2 M20 x 1.5 20 4140 ALLOY View Product
- NA0150-140 80570 KNHM 14x1.5MX M14 x 1.5 M20 x 1.5 20 4140 ALLOY View Product
- - 80371 KNHM 16x2MX M16 x 2 M22 x 1.5 22 4140 ALLOY View Product
- NA0150-160 80571 KNHM 16x1.5MX M16 x 1.5 M22 x 1.5 22 4140 ALLOY View Product
- NA0150-180 80572 KNHM 18x1.5MX M18 x 1.5 M24 x 1.5 24 4140 ALLOY View Product
- - 80373 KNHM 20x2.5MX M20 x 2.5 M30 x 2 30 4140 ALLOY View Product
- NA0150-200 80573 KNHM 20x1.5MX M20 x 1.5 M30 x 2 30 4140 ALLOY View Product
- NA0150-220 80574 KNHM 22x1.5MX M22 x 1.5 M32 x 2 32 4140 ALLOY View Product
- - 80375 KNHM 24x3MX M24 x 3 M33 x 2 33 4140 ALLOY View Product
- NA0150-240 80575 KNHM 24x2MX M24 x 2 M33 x 2 33 4140 ALLOY View Product
METRIC MINIATURE INSERTS - SELF-LOCKING - 4140 ALLOY STEEL (NA0146 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- - 81382 KNCML 2x0.4MX M2 x 0.4 M4 x 0.7 3 4140 ALLOY View Product
- - 81383 KNCML 2.5x0.45MX M2.5 x 0.45 M4.5 x 0.75 3.81 4140 ALLOY View Product
- NA0146-E030 81384 KNCML 3x0.5MX M3 x 0.5 M5 x 0.8 4.25 4140 ALLOY View Product
- NA0146-E040 81386 KNCML 4x0.7MX M4 x 0.7 M6 x 0.75 5.25 4140 ALLOY View Product
METRIC THIN WALL INSERTS - SELF-LOCKING - 4140 ALLOY STEEL (NA0148 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0148-E050 81351 KNML 5x0.8MX M5 x .8 M8 x 1.25 8 4140 ALLOY View Product
- NA0148-E060 81352 KNML 6x1.0MX M6 x 1 M10 x 1.25 10 4140 ALLOY View Product
- - 81353 KNML 8x1.25MX M8 x 1.25 M12 x 1.25 12 4140 ALLOY View Product
- NA0148-E080 81553 KNML 8x1.0MX M8 x 1 M12 x 1.25 12 4140 ALLOY View Product
- - 81355 KNML 10x1.5MX M10 x 1.5 M14 x 1.5 14 4140 ALLOY View Product
- NA0148-E100 81555 KNML 10x1.25MX M10 x 1.25 M14 x 1.5 14 4140 ALLOY View Product
- - 81356 KNML 12x1.75MX M12 x 1.75 M16 x 1.5 16 4140 ALLOY View Product
- NA0148-E120 81556 KNML 12x1.25MX M12 x 1.25 M16 x 1.5 16 4140 ALLOY View Product
METRIC HEAVY DUTY INSERTS - SELF-LOCKING- 4140 ALLOY STEEL (NA0150 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0150-E040 81363 KNHML 4x0.7MX M4 x .7 M8 x 1.25 8 4140 ALLOY View Product
- NA0150-E050 81364 KNHML 5x0.8MX M5 x .8 M10 x 1.25 10 4140 ALLOY View Product
- NA0150-E060 81365 KNHML 6x1MX M6 x 1 M12 x 1.25 12 4140 ALLOY View Product
- - 81366 KNHML 8x1.25MX M8 x 1.25 M14 x 1.5 14 4140 ALLOY View Product
- NA0150-E080 81566 KNHML 8x1MX M8 x 1 M14 x 1.5 14 4140 ALLOY View Product
- - 81367 KNHML 10x1.5MX M10 x 1.5 M16 x 1.5 16 4140 ALLOY View Product
- NA0150-E100 81567 KNHML 10x1.25MX M10 x 1.25 M16 x 1.5 16 4140 ALLOY View Product
- - 81369 KNHML 12x1.75MX M12 x 1.75 M18 x 1.5 18 4140 ALLOY View Product
- NA0150-E120 81569 KNHML 12x1.25MX M12 x 1.25 M18 x 1.5 18 4140 ALLOY View Product
- - 81370 KNHML 14x2MX M14 x 2 M20 x 1.5 20 4140 ALLOY View Product
- NA0150-E140 81570 KNHML 14x1.5MX M14 x 1.5 M20 x 1.5 20 4140 ALLOY View Product
- - 81371 KNHML 16x2MX M16 x 2 M22 x 1.5 22 4140 ALLOY View Product
- NA0150-E160 81571 KNHML 16x1.5MX M16 x 1.5 M22 x 1.5 22 4140 ALLOY View Product
- NA0150-E180 81572 KNHML 18x1.5MX M18 x 1.5 M24 x 1.5 24 4140 ALLOY View Product
- - 81373 KNHML 20x2.5MX M20 x 2.5 M30 x 2 30 4140 ALLOY View Product
- NA0150-E200 81573 KNHML 20x1.5MX M20 x 1.5 M30 x 2 30 4140 ALLOY View Product
- NA0150-E220 81574 KNHML 22x1.5MX M22 x 1.5 M32 x 2 32 4140 ALLOY View Product
- - 81375 KNHML 24x3MX M24 x 3 M33 x 2 33 4140 ALLOY View Product
- NA0150-E240 81575 KNHML 24x2MX M24 x 2 M33 x 2 33 4140 ALLOY View Product
METRIC MINIATURE INSERTS - NON-LOCKING - A286 (NA0147 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0147-020 78382 KNCM 2x0.4T M2 x 0.4 M4 x 0.7 3 A286 CRES View Product
- NA0147-025 78383 KNCM 2.5x0.45T M2.5 x 0.45 M4.5 x 0.75 3.81 A286 CRES View Product
- NA0147-030 78384 KNCM 3x0.5T M3 x 0.5 M5 x 0.8 4.25 A286 CRES View Product
- NA0147-040 78386 KNCM 4x0.7T M4 x 0.7 M6 x 0.75 5.25 A286 CRES View Product
METRIC THIN WALL INSERTS - NON-LOCKING - A286 (NA0149 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0149-050 78351 KNM 5x0.8T M5 x .8 M8 x 1.25 8 A286 CRES View Product
- NA0149-060 78352 KNM 6x1.0T M6 x 1 M10 x 1.25 10 A286 CRES View Product
- - 78353 KNM 8x1.25T M8 x 1.25 M12 x 1.25 12 A286 CRES View Product
- NA0149-080 78553 KNM 8x1.0T M8 x 1 M12 x 1.25 12 A286 CRES View Product
- - 78355 KNM 10x1.5T M10 x 1.5 M14 x 1.5 14 A286 CRES View Product
- NA0149-100 78555 KNM 10x1.25T M10 x 1.25 M14 x 1.5 14 A286 CRES View Product
- - 78356 KNM 12x1.75T M12 x 1.75 M16 x 1.5 16 A286 CRES View Product
- NA0149-120 78556 KNM 12x1.25T M12 x 1.25 M16 x 1.5 16 A286 CRES View Product
METRIC HEAVY DUTY INSERTS - NON-LOCKING - A286 (NA0151 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0151-040 78363 KNHM 4x0.7T M4 x .7 M8 x 1.25 8 A286 CRES View Product
- NA0151-050 78364 KNHM 5x0.8T M5 x .8 M10 x 1.25 10 A286 CRES View Product
- NA0151-060 78365 KNHM 6x1T M6 x 1 M12 x 1.25 12 A286 CRES View Product
- - 78366 KNHM 8x1.25T M8 x 1.25 M14 x 1.5 14 A286 CRES View Product
- NA0151-080 78566 KNHM 8x1T M8 x 1 M14 x 1.5 14 A286 CRES View Product
- - 78367 KNHM 10x1.5T M10 x 1.5 M16 x 1.5 16 A286 CRES View Product
- NA0151-100 78567 KNHM 10x1.25T M10 x 1.25 M16 x 1.5 16 A286 CRES View Product
- - 78369 KNHM 12x1.75T M12 x 1.75 M18 x 1.5 18 A286 CRES View Product
- NA0151-120 78569 KNHM 12x1.25T M12 x 1.25 M18 x 1.5 18 A286 CRES View Product
- - 78370 KNHM 14x2T M14 x 2 M20 x 1.5 20 A286 CRES View Product
- NA0151-140 78570 KNHM 14x1.5T M14 x 1.5 M20 x 1.5 20 A286 CRES View Product
- - 78371 KNHM 16x2T M16 x 2 M22 x 1.5 22 A286 CRES View Product
- NA0151-160 78571 KNHM 16x1.5T M16 x 1.5 M22 x 1.5 22 A286 CRES View Product
- NA0151-180 78572 KNHM 18x1.5T M18 x 1.5 M24 x 1.5 24 A286 CRES View Product
- - 78373 KNHM 20x2.5T M20 x 2.5 M30 x 2 30 A286 CRES View Product
- NA0151-200 78573 KNHM 20x1.5T M20 x 1.5 M30 x 2 30 A286 CRES View Product
- NA0151-220 78574 KNHM 22x1.5T M22 x 1.5 M32 x 2 32 A286 CRES View Product
- - 78375 KNHM 24x3T M24 x 3 M33 x 2 33 A286 CRES View Product
- NA0151-240 78575 KNHM 24x2T M24 x 2 M33 x 2 33 A286 CRES View Product
METRIC MINIATURE INSERTS - SELF-LOCKING - A286 (NA0147 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- - 79382 KNCML 2x0.4T M2 x 0.4 M4 x 0.7 3 A286 CRES View Product
- - 79383 KNCML 2.5x0.45T M2.5 x 0.45 M4.5 x 0.75 3.81 A286 CRES View Product
- NA0147-E030 79384 KNCML 3x0.5T M3 x 0.5 M5 x 0.8 4.25 A286 CRES View Product
- NA0147-E040 79386 KNCML 4x0.7T M4 x 0.7 M6 x 0.75 5.25 A286 CRES View Product
METRIC THIN WALL INSERTS - SELF-LOCKING - A286 (NA0149 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0149-E050 79351 KNML 5x0.8T M5 x .8 M8 x 1.25 8 A286 CRES View Product
- NA0149-E060 79352 KNML 6x1.0T M6 x 1 M10 x 1.25 10 A286 CRES View Product
- - 79353 KNML 8x1.25T M8 x 1.25 M12 x 1.25 12 A286 CRES View Product
- NA0149-E080 79553 KNML 8x1.0T M8 x 1 M12 x 1.25 12 A286 CRES View Product
- - 79355 KNML 10x1.5T M10 x 1.5 M14 x 1.5 14 A286 CRES View Product
- NA0149-E100 79555 KNML 10x1.25T M10 x 1.25 M14 x 1.5 14 A286 CRES View Product
- - 79356 KNML 12x1.75T M12 x 1.75 M16 x 1.5 16 A286 CRES View Product
- NA0149-E120 79556 KNML 12x1.25T M12 x 1.25 M16 x 1.5 16 A286 CRES View Product
METRIC HEAVY DUTY INSERTS - SELF-LOCKING - A286 (NA0151 SERIES)
MIL-SPEC NA SPEC CHRISLYNN FAIRCHILD P/N I.D. O.D. LENGTH MATERIAL MORE INFO
- NA0151-E040 79363 KNHML 4x0.7T M4 x .7 M8 x 1.25 8 A286 CRES View Product
- NA0151-E050 79364 KNHML 5x0.8T M5 x .8 M10 x 1.25 10 A286 CRES View Product
- NA0151-E060 79365 KNHML 6x1T M6 x 1 M12 x 1.25 12 A286 CRES View Product
- - 79366 KNHML 8x1.25T M8 x 1.25 M14 x 1.5 14 A286 CRES View Product
- NA0151-E080 79566 KNHML 8x1T M8 x 1 M14 x 1.5 14 A286 CRES View Product
- - 79367 KNHML 10x1.5T M10 x 1.5 M16 x 1.5 16 A286 CRES View Product
- NA0151-E100 79567 KNHML 10x1.25T M10 x 1.25 M16 x 1.5 16 A286 CRES View Product
- - 79369 KNHML 12x1.75T M12 x 1.75 M18 x 1.5 18 A286 CRES View Product
- NA0151-E120 79569 KNHML 12x1.25T M12 x 1.25 M18 x 1.5 18 A286 CRES View Product
- - 79370 KNHML 14x2T M14 x 2 M20 x 1.5 20 A286 CRES View Product
- NA0151-E140 79570 KNHML 14x1.5T M14 x 1.5 M20 x 1.5 20 A286 CRES View Product
- - 79371 KNHML 16x2T M16 x 2 M22 x 1.5 22 A286 CRES View Product
- NA0151-E160 79571 KNHML 16x1.5T M16 x 1.5 M22 x 1.5 22 A286 CRES View Product
- NA0151-E180 79572 KNHML 18x1.5T M18 x 1.5 M24 x 1.5 24 A286 CRES View Product
- - 79373 KNHML 20x2.5T M20 x 2.5 M30 x 2 30 A286 CRES View Product
- NA0151-E200 79573 KNHML 20x1.5T M20 x 1.5 M30 x 2 30 A286 CRES View Product
- NA0151-E220 79574 KNHML 22x1.5T M22 x 1.5 M32 x 2 32 A286 CRES View Product
- - 79375 KNHML 24x3T M24 x 3 M33 x 2 33 A286 CRES View Product
- NA0151-E240 79575 KNHML 24x2T M24 x 2 M33 x 2 33 A286 CRES View Product