Knurled Threaded Insert( Nut Insert )
KNURLED THREADED INSERT
( Nut Insert )
( Nut Insert )
Top Screw ST series Threaded insert is designed to be installed in the small space. The body length after riveting is shorter than any standard type of blind rivet nut. The head of insert can press tightly against surface of application. ST series can be installed on application which the thickness is thicker than 0.03” (0.76mm) and the application can be most any type of material. The material for ST series can be Steel and Stainless Steel. Further information about recommended hole size, grip range and application thickness. Please refer below table.
APPLICATION：
ST series Threaded insert is commonly used in any industry including automobile industry.
MATERIAL AVALIABLE：
STEEL
OTHER SIZE, MATERIAL ARE AVAILABLE UPON REQUEST
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| THREAD SIZE | PART NO. | HD ±0.005 | L ±0.015 | D MAX |
| UNC 4-40 | CATI 440 | .211 | .370 | .1875 |
| UNC 6-32 | CATI 632 | .240 | .370 | .2185 |
| UNC 8-32 | CATI 832 | .269 | .370 | .2495 |
| UNC 10-24 | CATI 1024 | .306 | .370 | .2805 |
| UNC 10-32 | CATI 1032 | .306 | .370 | .2805 |
| UNC 1/4-20 | CATI 420 | .400 | .515 | .3745 |
| UNC 5/16-18 | CATI 518 | .528 | .615 | .4995 |
| UNC 3/8-16 | CATI 616 | .588 | .745 | .5615 |
| UNC 1/2-13 | CATI 1213 | .800 | .935 | .7485 |
| THREAD SIZE | PART NO. | HD ±0.005 | L ±0.015 | D MAX |
| ISO M3x0,5 | CATM 350 | 5,36 | 9,40 | 4,76 |
| ISO M4x0,7 | CATM 470 | 6,83 | 9,40 | 6,34 |
| ISO M5x0,8 | CATM 580 | 7,77 | 9,40 | 7,12 |
| ISO M6x1,0 | CATM 610 | 10,16 | 13,08 | 9,51 |
| ISO M8x1,25 | CATM 8125 | 13,41 | 15,62 | 12,69 |
| ISO M10x1,5 | CATM 1015 | 14,94 | 18,92 | 14,26 |
| ISO M12x1,75 | CATM 12175 | 20,32 | 23,75 | 19,01 |
| IL MAX | LB ±0.015 | ILB MAX | IATD MAX | HOLE DEPTH MIN |
| .205 | .660 | .495 | .395 | .400 |
| .205 | .675 | .505 | .410 | .400 |
| .205 | .675 | .505 | .410 | .400 |
| .205 | .685 | .520 | .385 | .400 |
| .205 | .685 | .520 | .385 | .400 |
| .275 | 1.005 | .760 | .615 | .540 |
| .325 | 1.065 | .770 | .630 | .640 |
| .390 | 1.450 | 1.095 | .890 | .770 |
| .485 | NA | NA | NA | .960 |
| IL MAX | LB ±0.015 | ILB MAX | IATD MAX | HOLE DEPTH MIN |
| 5,21 | 16,77 | 12,57 | 10,03 | 10,16 |
| 5,21 | 17,15 | 12,83 | 10,41 | 10,16 |
| 5,21 | 17,40 | 13,21 | 9,78 | 10,16 |
| 6,99 | 25,53 | 19,30 | 15,62 | 13,72 |
| 8,26 | 27,05 | 19,56 | 16,00 | 16,26 |
| 9,91 | 36,83 | 27,81 | 22,61 | 19,56 |
| 12,32 | NA | NA | NA | 24,38 |
| THREAD SIZE | .030-.090 MAT. THICKNESS | .091-.124 MAT. THICKNESS | ||
| DRILL SIZE | DECIMAL | DRILL SIZE | DECIMAL | |
| UNC 4-40 | 3/16 | .1875 | #10 | .1935 |
| UNC 6-32 | 7/32 | .2188 | #2 | .2210 |
| UNC 8-32 | 1/4 | .2500 | "F" | .2570 |
| UNC 10-24 | 9/32 | .2812 | "L" | .2900 |
| UNC 10-32 | 9/32 | .2812 | "L" | .2900 |
| UNC 1/4-20 | 0.375 | .3750 | 0.375 | .3750 |
| UNC 5/16-18 | 0.5 | .5000 | 0.5 | .5000 |
| UNC 3/8-16 | 0.5625 | .5625 | 0.5625 | .5625 |
| UNC 1/2-13 | 0.75 | .7500 | 0.765625 | .7656 |
| THREAD SIZE | .030-.090 MAT. THICKNESS | .091-.124 MAT. THICKNESS | ||
| DRILL SIZE | DECIMAL | DRILL SIZE | DECIMAL | |
| ISO M3x0,5 | 4,75 | .1875 | 4,90 | .1935 |
| ISO M4x0,7 | 6,35 | .2500 | 6,52 | .2570 |
| ISO M5x0,8 | 7,14 | .2812 | 7,36 | .2900 |
| ISO M6x1,0 | 9,52 | .3750 | 9,52 | .3750 |
| ISO M8x1,25 | 12,70 | .5000 | 12,70 | .5000 |
| ISO M10x1,5 | 14,28 | .5625 | 14,28 | .5625 |
| ISO M12x1,75 | 19,05 | .7500 | 19,44 | .7656 |
| .125-.186 MAT. THICKNESS | .187-OVER MAT. THICKNESS | ||
| DRILL SIZE | DECIMAL | DRILL SIZE | DECIMAL |
| #10 | .1935 | #9 | .1960 |
| #1 | .2280 | #1 | .2280 |
| 17/64 | .2656 | 17/64 | .2656 |
| "L" | .2900 | 19/64 | .2969 |
| "L" | .2900 | 19/64 | .2969 |
| "W" | .3860 | 25/64 | .3906 |
| 33/64 | .5156 | 33/64 | .5156 |
| 37/64 | .5781 | 37/64 | .5781 |
| 25/32 | .7810 | 51/64 | .7970 |
| .125-.186 MAT. THICKNESS | .187-OVER MAT. THICKNESS | ||
| DRILL SIZE | DECIMAL | DRILL SIZE | DECIMAL |
| 4,90 | .1935 | 4,97 | .1960 |
| 6,74 | .2656 | 6,74 | .2656 |
| 7,36 | .2900 | 7,54 | .2969 |
| 9,80 | .3860 | 9,92 | .3906 |
| 13,09 | .5156 | 13,09 | .5156 |
| 14,68 | .5781 | 14,68 | .5781 |
| 19,83 | .7810 | 20,24 | .7970 |
UNIFIED (INCH) AND METRIC THREAD SIZES
| THREAD SIZE | PART NO. | HD ±0.005 | L ±0.015 | D MAX | IL MAX |
| UNC 4-40 | CATI 440 | .211 | .370 | .1875 | .205 |
| UNC 6-32 | CATI 632 | .240 | .370 | .2185 | .205 |
| UNC 8-32 | CATI 832 | .269 | .370 | .2495 | .205 |
| UNC 10-24 | CATI 1024 | .306 | .370 | .2805 | .205 |
| UNC 10-32 | CATI 1032 | .306 | .370 | .2805 | .205 |
| UNC 1/4-20 | CATI 420 | .400 | .515 | .3745 | .275 |
| UNC 5/16-18 | CATI 518 | .528 | .615 | .4995 | .325 |
| UNC 3/8-16 | CATI 616 | .588 | .745 | .5615 | .390 |
| UNC 1/2-13 | CATI 813 | .800 | .935 | .7485 | .485 |
| THREAD SIZE | PART NO. | HD ±0.005 | L ±0.015 | D MAX | IL MAX |
| ISO M3x0,5 | CATM 350 | 5,36 | 9,40 | 4,76 | 5,21 |
| ISO M4x0,7 | CATM 470 | 6,83 | 9,40 | 6,34 | 5,21 |
| ISO M5x0,8 | CATM 580 | 7,77 | 9,40 | 7,12 | 5,21 |
| ISO M6x1,0 | CATM 610 | 10,16 | 13,08 | 9,51 | 6,99 |
| ISO M8x1,25 | CATM 8125 | 13,41 | 15,62 | 12,69 | 8,26 |
| ISO M10x1,5 | CATM 1015 | 14,94 | 18,92 | 14,26 | 9,91 |
| ISO M12x1,75 | CATM 12175 | 20,32 | 23,75 | 19,01 | 12,32 |
HOLE SIZE / MATERIAL THICKNESS CHART
| THREAD SIZE | .030-.090 MAT. THICKNESS | .091-.124 MAT. THICKNESS | .125-.186 MAT. THICKNE | ||
| DRILL SIZE | DECIMAL | DRILL SIZE | DECIMAL | DRILL SIZE | |
| UNC 4-40 | 3/16 | .1875 | #10 | .1935 | #10 |
| UNC 6-32 | 7/32 | .2188 | #2 | .2210 | #1 |
| UNC 8-32 | 1/4 | .2500 | "F" | .2570 | 17/64 |
| UNC 10-24 | 9/32 | .2812 | "L" | .2900 | "L" |
| UNC 10-32 | 9/32 | .2812 | "L" | .2900 | "L" |
| UNC 1/4-20 | 3/8 | .3750 | 3/8 | .3750 | "W" |
| UNC 5/16-18 | 1/2 | .5000 | 1/2 | .5000 | 33/64 |
| UNC 3/8-16 | 9/16 | .5625 | 9/16 | .5625 | 37/64 |
| UNC 1/2-13 | 3/4 | .7500 | 49/64 | .7656 | 25/32 |
| THREAD SIZE | .030-.090 MAT. THICKNESS | .091-.124 MAT. THICKNESS | .125-.186 MAT. THICKNE | ||
| DRILL SIZE | DECIMAL | DRILL SIZE | DECIMAL | DRILL SIZE | |
| ISO M3x0,5 | 4,75 | .1875 | 4,90 | .1935 | 4,90 |
| ISO M4x0,7 | 6,35 | .2500 | 6,52 | .2570 | 6,74 |
| ISO M5x0,8 | 7,14 | .2812 | 7,36 | .2900 | 7,36 |
| ISO M6x1,0 | 9,52 | .3750 | 9,52 | .3750 | 9,80 |
| ISO M8x1,25 | 12,70 | .5000 | 12,70 | .5000 | 13,09 |
| ISO M10x1,5 | 14,28 | .5625 | 14,28 | .5625 | 14,68 |
| ISO M12x1,75 | 19,05 | .7500 | 19,44 | .7656 | 19,83 |
| LB ±0.015 | ILB MAX | IATD MAX | HOLE DEPTH MIN |
| .660 | .495 | .395 | .400 |
| .675 | .505 | .410 | .400 |
| .675 | .505 | .410 | .400 |
| .685 | .520 | .385 | .400 |
| .685 | .520 | .385 | .400 |
| 1.005 | .760 | .615 | .540 |
| 1.065 | .770 | .630 | .640 |
| 1.450 | 1.095 | .890 | .770 |
| NA | NA | NA | .960 |
| LB ±0.015 | ILB MAX | IATD MAX | HOLE DEPTH MIN |
| 16,77 | 12,57 | 10,03 | 10,16 |
| 17,15 | 12,83 | 10,41 | 10,16 |
| 17,40 | 13,21 | 9,78 | 10,16 |
| 25,53 | 19,30 | 15,62 | 13,72 |
| 27,05 | 19,56 | 16,00 | 16,26 |
| 36,83 | 27,81 | 22,61 | 19,56 |
| NA | NA | NA | 24,38 |
| 5-.186 MAT. THICKNESS | .187-OVER MAT. THICKNESS | |
| DECIMAL | DRILL SIZE | DECIMAL |
| .1935 | #9 | .1960 |
| .2280 | #1 | .2280 |
| .2656 | 17/64 | .2656 |
| .2900 | 19/64 | .2969 |
| .2900 | 19/64 | .2969 |
| .3860 | 25/64 | .3906 |
| .5156 | 33/64 | .5156 |
| .5781 | 37/64 | .5781 |
| .7810 | 51/64 | .7970 |
| 5-.186 MAT. THICKNESS | .187-OVER MAT. THICKNESS | |
| DECIMAL | DRILL SIZE | DECIMAL |
| .1935 | 4,97 | .1960 |
| .2656 | 6,74 | .2656 |
| .2900 | 7,54 | .2969 |
| .3860 | 9,92 | .3906 |
| .5156 | 13,09 | .5156 |
| .5781 | 14,68 | .5781 |
| .7810 | 20,24 | .7970 |
| Thread size | P/N. | A | D | L | C | D | Thread Depth Min. | Hole size |
| ± 0.25 | ± 0.15 | ± 0.3 | ± 0.1 | |||||
| 10-24 | ESNI512 | 0.433 | 0.244 | 0.500 | 0.197 | 0.303 | 0.34 | 0.255 |
| ESNI516 | 0.433 | 0.244 | 0.625 | 0.197 | 0.303 | 0.47 | 0.255 | |
| ESNI520 | 0.433 | 0.244 | 0.750 | 0.197 | 0.303 | 0.59 | 0.255 | |
| ESNI524 | 0.433 | 0.244 | 1.000 | 0.197 | 0.303 | 0.84 | 0.255 | |
| 1/4-20 | ESNI612 | 0.563 | 0.308 | 0.500 | 0.197 | 0.378 | 0.34 | 0.311 |
| ESNI616 | 0.563 | 0.308 | 0.625 | 0.197 | 0.378 | 0.47 | 0.311 | |
| ESNI620 | 0.563 | 0.308 | 0.750 | 0.197 | 0.378 | 0.59 | 0.311 | |
| ESNI624 | 0.563 | 0.308 | 1.000 | 0.197 | 0.378 | 0.84 | 0.311 | |
| 5/16-18 | ESNI812 | 0.687 | 0.375 | 0.500 | 0.197 | 0.445 | 0.34 | 0.378 |
| ESNI816 | 0.687 | 0.375 | 0.625 | 0.197 | 0.445 | 0.47 | 0.378 | |
| ESNI820 | 0.687 | 0.375 | 0.750 | 0.197 | 0.445 | 0.59 | 0.378 | |
| ESNI824 | 0.687 | 0.375 | 1.000 | 0.197 | 0.445 | 0.84 | 0.378 |