Insert type: self-tapping
Means of securing: interference fit
Guide: integral pilot
Guide clearance: .003-.004 under pilot hole diameter
Integral die: 3 to 6 cutting surfaces depending on diameter
Internal threads: Inch: Class 2B, Metric: Class 6H
External thread type: left-handed
External thread profile: ACME
Metallurgy: S-7 tool steel
Hardness: 56 RC
Heat treat: through-hardened
Tempering: double draw

All C-Serts are self-tapping and self-aligning, with an integral die for truing up damaged or defective fasteners, left-handed external engagement threads, and a Life-time warranty against failure and thread wear.

C-SERTS

Standard And Metric are suitable for almost all repairs of OEM threaded holes. Also, they are
thick enough to replace failed Heli-Coils, Keenserts, E-Z Loks, Hole Savers, and other brands.

Standard

Thread I.D. & T.P.I Part Number Package Quantity Pilot Hole Diameter Socket Size C-Sert Length C-Sert Diameter
1/4-20 CDS250 6 pieces 1/2” 1/2” 0.684 0.521
1/4-28 CDS250- F 6 pieces 1/2” 1/2” 0.684 0.521
5/16-18 CDS312 6 pieces 9/16” 5/8” 0.742 0.584
5/16-24 CDS312- F 6 pieces 9/16” 5/8” 0.742 0.584
3/8-16 CDS375 6 pieces 11/16” 3/4” 0.873 0.716
3/8-24 CDS375- F 6 pieces 11/16” 3/4” 0.873 0.716
1/2-13 CDS500 6 pieces 13/16” 3/4” 0.997 0.840
1/2-20 CDS500- F 6 pieces 13/16” 3/4” 0.997 0.840
5/8-11 C625 6 pieces 1” 23mm 1.249 1.052
5/8-18 C625-F 6 pieces 1” 23mm 1.249 1.052
3/4-10 C750 6 pieces 1 1/8” 23mm 1.495 1.176
3/4-16 C750-F 6 pieces 1 1/8” 23mm 1.495 1.176
7/8-9 C875 4 pieces 1 3/8” 27mm 1.875 1.437
1”-8 C1000 4 pieces 1 1/2″ 27mm 2.103 1.562
1”-14 C1000-F 4 pieces 1 1/2″ 27mm 2.103 1.562
1 1/8”-7 C1125 3 pieces 1 3/4″ 33mm 2.437 1.812
1 1/4”-7 C1250 3 pieces 1 3/4″ 33mm 2.437 1.812
1 1/2”-6 C1500 2 pieces 2 40mm 2.750 2.312
1 3/4”-5 C1750 2 pieces 2 3/4” 60mm 3.464 2.812

Metric

Thread I.D. & T.P.I Part Number Package Quantity Pilot Hole Diameter Socket Size C-Sert Length C-Sert Diameter
6mm x 1.0 CDSM6 6 pieces 1/2” 1/2” 0.684 0.521
8mm x 1.25 CDSM8 6 pieces 9/16” 5/8” 0.742 0.584
10mm x 1.50 CDSM10 6 pieces 11/16” 3/4” 0.873 0.716
10mm x 1.25 CDSM10-F 6 pieces 11/16” 3/4” 0.873 0.716
12mm x 1.75 CDSM12 6 pieces 13/16” 3/4” 0.873 0.716
14mm x 2.0 M14 6 pieces 1” 23mm 1.249 1.052
16mm x 2.0 M16 6 pieces 1” 23mm 1.249 1.052
18mm x 2.5 M18 6 pieces 1 1/8” 23mm 1.495 1.176
20mm x 2.5 M20 4 pieces 1 3/8” 27mm 1.875 1.437
24mm x 3.0 M24 4 pieces 1 1/2” 27mm 2.103 1.562
27mm x 3.0 M27 3 pieces 1 3/4” 33mm 2.437 1.812
30mm x 3.5 M30 3 pieces 1 1/8” 33mm 2.437 1.812
36mm x 4.0 M36 2 pieces 2” 40mm 2.700 2.062
42mm x 3.0 M42-F 2 pieces 2 3/4″ 60mm 3.464 2.812

HEAVY WALL C-SERTS

Heavy-wall C-Serts are intended for when a hole has already been enlarged, and you want to return to the original
fastener size. They can also be used to replace failed heavy-wall Keenserts and failed custom threaded sleeves.

Standard

Thread I.D. & T.P.I Part Number Package Quantity Pilot Hole Diameter Socket Size C-Sert Length C-Sert Diameter
5/8-11 C625-HW 4 pieces 1 5/16” 23mm 1.495 1.364
3/4-10 C750-HW 4 pieces 1 5/16” 23mm 1.495 1.364
1”-8 C1000-HW 3 pieces 1 3/4” 33mm 2.103 1.812
1” 1/4-7 C1250-HW 2 pieces 2” 40mm 2.700 2.062

Metric

Thread I.D. & T.P.I Part Number Package Quantity Pilot Hole Diameter Socket Size C-Sert Length C-Sert Diameter
16mm x 2.0 M16-HW 4 pieces 1 1/2” 27mm 1.495 1.364
20mm x 2.5 M20-HW 4 pieces 1 1/2” 27mm 2.103 1.562
24mm x 3.0 M24-HW 3 pieces 1 3/4” 33mm 2.103 1.812
30mm x 3.5 M30-HW 2 pieces 1 3/4” 40mm 2.700 2.062

Insert type: self-tapping
Means of securing: interference fit
Guide: detachable pilot
Guide clearance: .003-.004 under pilot hole diameter
Internal threads: Inch: Class 2B, Metric: Class 6H

External thread type: right-handed
External thread profile: standard with flat crest
Metallurgy: 8620 gear steel
Hardness: surface 62RC, core 45RC
Heat treat: case hardened

All Mini Thinwall C-Serts are self-tapping and self-aligning, with a detachable
pilot and a Life-time warranty against failure and thread wear.

MINI THINWALL C-SERTS

For use where space is at a premium.

Standard

Thread I.D. & T.P.I Part Number Package Quantity Pilot Hole Diameter Socket Size C-Sert Length C-Sert Diameter
1/4 – 20 C250 10 pieces 23/64” 7/16” 0.487 0.375
5/16 -18 C312 10 pieces 29/64” 1/2” 0.557 0.469
3/8 – 16 C375 10 pieces 17/32” 9/16” 0.687 0.563
1/2-13 C500 8 pieces 45/64” 3/4” 0.745 0.734

Metric

Thread I.D. & T.P.I Part Number Package Quantity Pilot Hole Diameter Socket Size C-Sert Length C-Sert Diameter
16mm x 1.0 M6 10 pieces 23/64” 10mm 0.487 0.375
8mm x 1.25 M8 10 pieces 29/64” 13mm 0.557 0.469
10mm x 1.50 M10 10 pieces 17/32” 17mm 0.687 0.563
10mm x 1.25 M10-F 10 pieces 17/32” 17mm 0.687 0.563
12mm x 1.75 M12 8 pieces 45/64” 19mm 0.745 0.734
12mm x 1.25 M12-F 8 pieces 45/64” 19mm 0.745 0.734