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Solid Inserts for Metal

Here at MF Supply, we are a distributor for the most popular EZ-Lok inserts in Carbon steel & Stainless Steel 303 or 316.  UNC 4-40 to 1-8. UNF 10-32 to 1-14. Metric M3 to M20. One of our special skills is providing functional equivalents to expensive brand name fasteners. This helps our customers save money and reduce long lead times.

Use CTRL-F to find the part number you need and cross it to an equivalent .

Then, click the "More Info" link next to your part number or use the search bar  to see our e-commerce offerings and buy online or request a quote.

Can't find what you're looking for? Email us at sales@mfsupply.com for a custom quote. "We have the right screw for you" is our motto after all!

Stainless Steel Solid Thread Inserts for Metal

COARSE THREAD SIZES IN 303 STAINLESS STEEL
EZ-LOK
Part
303-004 4-40 10-32 .250 5/32 10-32 9/32 Quote Request
303-006 6-32 1/4-20 .280 7 1/4-20 11/32 Quote Request
303-008 8-32 5/16-18 .290 F 5/16-18 7/16 500-1 Quote Request
303-3 10-24 3/8-16 .406 5/16 3/8-16 15/32 500-2 Quote Request
303-4 1/4-20 7/16-14 .437 23/64 7/16-14 1/2 500-3 Quote Request
303-5 5/16-18 1/2-13 .484 27/64 1/2-13 9/16 500-4 Quote Request
303-6 3/8-16 9/16-12 .515 31/64 9/16-12 19/32 500-5 Quote Request
303-7 7/16-14 5/8-11 .656 17/32 5/8-11 23/32 500-6 Quote Request
303-8 1/2-13 3/4-10 .656 21/32 3/4-10 3/4 500-7 Quote Request
303-10 5/8-11 7/8-9 .687 49/64 7/8-9 13/16 500-8 Quote Request
303-12 3/4-10 1-8 .781 7/8 1-8 7/8 500-9 Quote Request
FINE THREAD SIZES IN 303 STAINLESS STEEL
EZ-LOK Internal External Length Tap Drill Tap Minimum Full
Part No. Thread Thread in. Size Size Thread Depth
303-332 10-32 3/8-16 .406 5/16 3/8-16 15/32 500-2 Quote Request
303-428 1/4-28 7/16-14 .437 23/64 7/16-14 1/2 500-3 Quote Request
303-524 5/16-24 1/2-13 .484 27/64 1/2-13 9/16 500-4 Quote Request
303-624 3/8-24 9/16-12 .515 31/64 9/16-12 19/32 500-5 Quote Request
303-720 7/16-20 5/8-11 .656 17/32 5/8-11 23/32 500-6 Quote Request
303-820 1/2-20 3/4-10 .656 21/32 3/4-10 3/4 500-7 Quote Request

METRIC THREAD SIZES IN 303 STAINLESS STEEL METRIC
EZ-LOK Internal External Length Tap Drill Tap Minimum Full
Part No. Thread Thread Size Size Thread Depth
453-3 M3-0.5 M6-1.0 6.5mm 5.1mm M6-1.0 7.8mm Quote Request
453-4 M4-0.7 M8-1.25 7.5mm 6.9mm M8-1.25 9.0mm 500-1 Quote Request
453-5 M5-0.8 M8-1.25 7.5mm 6.9mm M8-1.25 9.0mm 500-1 Quote Request
453-6 M6-1.0 M10-1.5 10.5mm 8.6mm M10-1.5 12.0mm 500-3 Quote Request
453-8 M8-1.25 M12-1.75 12.5mm 10.4mm M12-1.75 14.5mm 500-4 Quote Request
453-10 M10-1.5 M16-2.0 17.0mm 14.0mm M16-2.0 19.0mm 500-5 Quote Request
453-12 M12-1.75 M16-2.0 17.0mm 14.0mm M16-2.0 19.0mm 500-6 Quote Request
453-16 M16-2.0 M24-3.0 20.0mm 21.0mm M24-3.0 24.0mm 500-8 Quote Request
METRIC THREAD SIZES IN 303 STAINLESS STEEL— METRIC INTERNAL/U.S.
EZ-LOK Internal External Length Tap Drill Tap Minimum
Part No. Thread Thread Size Size Thread Depth
653-6 M6-1.0 3/8-16 .406 5/16 3/8-16 15/32 500-3 Quote Request
653-8 M8-1.25 1/2-13 .484 27/64 1/2-13 9/16 500-4 Quote Request
653-10 M10-1.50 9/16-12 .515 31/64 9/16-12 19/32 500-5 Quote Request
653-10F M10-1.25 9/16-12 .515 31/64 9/16-12 19/32 500-5 Quote Request
653-12 M12-1.75 3/4-10 .656 21/32 3/4-10 3/4 500-6 Quote Request
653-14 M14-2.0 7/8-9 .687 49/64 7/8-9 13/16 500-7 Quote Request
653-16 M16-2.0 1-8 .781 7/8 1-8 7/8 500-8 Quote Request
COARSE/FINE THREAD SIZES IN 316 STAINLESS STEEL
EZ-LOK Internal External Length Tap Drill Tap Minimum Full
Part No. Thread Thread in. Size Size Thread
316-008 8-32 5/16-18 .290 F 5/16-18 7/16 500-1 Quote Request
316-3 10-24 3/8-16 .406 5/16 3/8-16 15/32 500-2 Quote Request
316-332 10-32 3/8-16 .406 5/16 3/8-16 15/32 500-2 Quote Request
316-4 1/4-20 7/16-14 .437 23/64 7/16-14 1.125 500-3 Quote Request
316-5 5/16-18 1/2-13 .484 27/64 1/2-13 1.125 500-4 Quote Request
316-6 3/8-16 9/16-12 .515 31/64 9/16-12 1.125 500-5 Quote Request