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MS51831, KNH, NAS1395, RKK > MS51831, KNH - HEAVY DUTY & THICKWALL - NITRONIC - INCH

Nitronic Keensert® Inch & Mil-Spec Heavy Duty Inserts - MS51831, KNH Series, Locking and Non-Locking

Looking for Nitronic MS51831 / KNH Heavy Duty Key-locking Inserts?

We carry Nitronic MS51831 / KNH Heavy Duty series in both locking and non-locking styles.

Stock sizes include: 1-12 through 7/8-14 in Nitronic.

Additional materials and sizes are available upon request.

Scroll down to find your size, or search by part number.

Add to Cart and buy online or email us for a custom quote.  Most popular products are in stock and ship within 24 hours.

Can't find what you're looking for? Email us at [email protected] for a custom quote. "We have the right screw for you" is our motto after all!
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8-32 ID X 5/16-18 OD Nitronic 60 Keensert® Alternative KNH0832JNIT EQUIVALENT | 76300NIT-MF | 8-32 ID X 5/16-18 OD NITRONIC KEENSERT® ALTERNATIVE
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10-24 ID X 3/8-16 OD Nitronic 60 Keensert® Alternative KNH1024JNIT EQUIVALENT | 76301NIT-MF | 10-24 ID X 3/8-16 OD NITRONIC KEENSERT® ALTERNATIVE
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1/4-20 ID X 7/16-14 OD Nitronic 60 Keensert® Alternative KNH420JNIT EQUIVALENT | 76302NIT-MF | 1/4-20 ID X 7/16-14 OD NITRONIC KEENSERT® ALTERNATIVE
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5/16-18 ID X 1/2-13 OD Nitronic 60 Keensert® Alternative KNH518JNIT EQUIVALENT | 76303NIT-MF | 5/16-18 ID X 1/2-13 OD NITRONIC KEENSERT® ALTERNATIVE
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3/8-16 ID X 9/16-12 OD Nitronic 60 Keensert® Alternative KNH616JNIT EQUIVALENT | 76304NIT-MF | 3/8-16 ID X 9/16-12 OD NITRONIC KEENSERT® ALTERNATIVE
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7/16-14 ID X 5/8-11 OD Nitronic 60 Keensert® Alternative KNH714JNIT EQUIVALENT | 76305NIT-MF | 7/16-14 ID X 5/8-11 OD NITRONIC KEENSERT® ALTERNATIVE
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1/2-13 ID X 11/16-11 OD Nitronic 60 Keensert® Alternative KNH813JNIT EQUIVALENT | 76306NIT-MF | 1/2-13 ID X 11/16-11 OD NITRONIC KEENSERT® ALTERNATIVE
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9/16-12 ID X 13/16-16 OD Nitronic 60 Keensert® Alternative KNH912JNIT EQUIVALENT | 76307NIT-MF | 9/16-12 ID X 13/16-16 OD NITRONIC KEENSERT® ALTERNATIVE
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5/8-11 ID X 7/8-14 OD Nitronic 60 Keensert® Alternative KNH1011JNIT EQUIVALENT | 76308NIT-MF | 5/8-11 ID X 7/8-14 OD NITRONIC KEENSERT® ALTERNATIVE
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3/4-10 ID X 1-1/8-12 OD Nitronic 60 Keensert® Alternative KNH1210JNIT EQUIVALENT | 76309NIT-MF | 3/4-10 ID X 1-1/8-12 OD NITRONIC KEENSERT® ALTERNATIVE
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7/8-9 ID X 1-1/4-12 OD Nitronic 60 Keensert® Alternative KNH1409JNIT EQUIVALENT | 76310NIT-MF | 7/8-9 ID X 1-1/4-12 OD NITRONIC KEENSERT® ALTERNATIVE
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1/8 ID X 1-3/8-12 OD Nitronic 60 Keensert® Alternative KNH1608JNIT EQUIVALENT | 76311NIT-MF | 1/8 ID X 1-3/8-12 OD NITRONIC KEENSERT® ALTERNATIVE
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10-32 ID X 3/8-16 OD Nitronic 60 Keensert® Alternative KNH1032JNIT EQUIVALENT | 76501NIT-MF | 10-32 ID X 3/8-16 OD NITRONIC KEENSERT® ALTERNATIVE
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1/4-28 ID X 7/16-14 OD Nitronic 60 Keensert® Alternative KNH428JNIT EQUIVALENT | 76502NIT-MF | 1/4-28 ID X 7/16-14 OD NITRONIC KEENSERT® ALTERNATIVE
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5/16-24 ID X 1/2-13 OD Nitronic 60 Keensert® Alternative KNH524JNIT EQUIVALENT | 76503NIT-MF | 5/16-24 ID X 1/2-13 OD NITRONIC KEENSERT® ALTERNATIVE
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3/8-24 ID X 9/16-12 OD Nitronic 60 Keensert® Alternative KNH624JNIT EQUIVALENT | 76504NIT-MF | 3/8-24 ID X 9/16-12 OD NITRONIC KEENSERT® ALTERNATIVE
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7/16-20 ID X 5/8-11 OD Nitronic 60 Keensert® Alternative KNH720JNIT EQUIVALENT | 76505NIT-MF | 7/16-20 ID X 5/8-11 OD NITRONIC KEENSERT® ALTERNATIVE
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1/2-20 ID X 11/16-11 OD Nitronic 60 Keensert® Alternative KNH820JNIT EQUIVALENT | 76506NIT-MF | 1/2-20 ID X 11/16-11 OD NITRONIC KEENSERT® ALTERNATIVE
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9/16-18 ID X 13/16-16 OD Nitronic 60 Keensert® Alternative KNH918JNIT EQUIVALENT | 76507NIT-MF | 9/16-18 ID X 13/16-16 OD NITRONIC KEENSERT® ALTERNATIVE
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5/8-18 ID X 7/8-14 OD Nitronic 60 Keensert® Alternative KNH1018JNIT EQUIVALENT | 76508NIT-MF | 5/8-18 ID X 7/8-14 OD NITRONIC KEENSERT® ALTERNATIVE
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3/4-16 ID X 1-1/8-12 OD Nitronic 60 Keensert® Alternative KNH1216JNIT EQUIVALENT | 76509NIT-MF | 3/4-16 ID X 1-1/8-12 OD NITRONIC KEENSERT® ALTERNATIVE
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7/8-14 ID X 1-1/4-12 OD Nitronic 60 Keensert® Alternative KNH1414JNIT EQUIVALENT | 76510NIT-MF | 7/8-14 ID X 1-1/4-12 OD NITRONIC KEENSERT® ALTERNATIVE
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1-12 ID X 1-3/8-12 OD Nitronic 60 Keensert® Alternative KNH1612JNIT EQUIVALENT | 76511NIT-MF | 1-12 ID X 1-3/8-12 OD NITRONIC KEENSERT® ALTERNATIVE
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8-32 ID X 5/16-18 OD Nitronic 60 Keensert® Alternative KNHL0832JNIT EQUIVALENT | 77300NIT-MF | 8-32 ID X 5/16-18 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
10-24 ID X 3/8-16 OD Nitronic 60 Keensert® Alternative KNHL1024JNIT EQUIVALENT | 77301NIT-MF | 10-24 ID X 3/8-16 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
1/4-20 ID X 7/16-14 OD Nitronic 60 Keensert® Alternative KNHL420JNIT EQUIVALENT | 77302NIT-MF | 1/4-20 ID X 7/16-14 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
5/16-18 ID X 1/2-13 OD Nitronic 60 Keensert® Alternative KNHL518JNIT EQUIVALENT | 77303NIT-MF | 5/16-18 ID X 1/2-13 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
3/8-16 ID X 9/16-12 OD Nitronic 60 Keensert® Alternative KNHL616JNIT EQUIVALENT | 77304NIT-MF | 3/8-16 ID X 9/16-12 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
7/16-14 ID X 5/8-11 OD Nitronic 60 Keensert® Alternative KNHL714JNIT EQUIVALENT | 77305NIT-MF | 7/16-14 ID X 5/8-11 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
1/2-13 ID X 11/16-11 OD Nitronic 60 Keensert® Alternative KNHL813JNIT EQUIVALENT | 77306NIT-MF | 1/2-13 ID X 11/16-11 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
9/16-12 ID X 13/16-16 OD Nitronic 60 Keensert® Alternative KNHL912JNIT EQUIVALENT | 77307NIT-MF | 9/16-12 ID X 13/16-16 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
5/8-11 ID X 7/8-14 OD Nitronic 60 Keensert® Alternative KNHL1011JNIT EQUIVALENT | 77308NIT-MF | 5/8-11 ID X 7/8-14 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
3/4-10 ID X 1-1/8-12 OD Nitronic 60 Keensert® Alternative KNHL1210JNIT EQUIVALENT | 77309NIT-MF | 3/4-10 ID X 1-1/8-12 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
7/8-9 ID X 1-1/4-12 OD Nitronic 60 Keensert® Alternative KNHL1409JNIT EQUIVALENT | 77310NIT-MF | 7/8-9 ID X 1-1/4-12 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
1/8 ID X 1-3/8-12 OD Nitronic 60 Keensert® Alternative KNHL1608JNIT EQUIVALENT | 77311NIT-MF | 1/8 ID X 1-3/8-12 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
10-32 ID X 3/8-16 OD Nitronic 60 Keensert® Alternative KNHL1032JNIT EQUIVALENT | 77501NIT-MF | 10-32 ID X 3/8-16 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
1/4-28 ID X 7/16-14 OD Nitronic 60 Keensert® Alternative KNHL428JNIT EQUIVALENT | 77502NIT-MF | 1/4-28 ID X 7/16-14 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
5/16-24 ID X 1/2-13 OD Nitronic 60 Keensert® Alternative KNHL524JNIT EQUIVALENT | 77503NIT-MF | 5/16-24 ID X 1/2-13 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
3/8-24 ID X 9/16-12 OD Nitronic 60 Keensert® Alternative KNHL624JNIT EQUIVALENT | 77504NIT-MF | 3/8-24 ID X 9/16-12 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
7/16-20 ID X 5/8-11 OD Nitronic 60 Keensert® Alternative KNHL720JNIT EQUIVALENT | 77505NIT-MF | 7/16-20 ID X 5/8-11 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
1/2-20 ID X 11/16-11 OD Nitronic 60 Keensert® Alternative KNHL820JNIT EQUIVALENT | 77506NIT-MF | 1/2-20 ID X 11/16-11 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
5/8-18 ID X 7/8-14 OD Nitronic 60 Keensert® Alternative KNHL1018JNIT EQUIVALENT | 77508NIT-MF | 5/8-18 ID X 7/8-14 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
3/4-16 ID X 1-1/8-12 OD Nitronic 60 Keensert® Alternative KNHL1216JNIT EQUIVALENT | 77509NIT-MF | 3/4-16 ID X 1-1/8-12 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
7/8-14 ID X 1-1/4-12 OD Nitronic 60 Keensert® Alternative KNHL1414JNIT EQUIVALENT | 77510NIT-MF | 7/8-14 ID X 1-1/4-12 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
1-12 ID X 1-3/8-12 OD Nitronic 60 Keensert® Alternative KNHL1612JNIT EQUIVALENT | 77511NIT-MF | 1-12 ID X 1-3/8-12 OD NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
1/2-20 ID X 3/4-16 OD Nitronic 60 Keensert® Alternative RKK1/2-20NIT EQUIVALENT | RKK1/2-20NIT-MF | 1/2-20 ID X 3/4-16 OD HEAVY DUTY NITRONIC KEENSERT® ALTERNATIVE
Get a custom quote today!
   
 
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