STACME 29° Threading Inserts

Thread Form: American Standard Stub Acme 29°
Insert Style: Standard laydown threading insert
Versions: External and internal, right-hand and left-hand
Pitch Range: 16–3 TPI
Insert Sizes: IC 1/4″–5/8″
Grade: CP5225 — available in every size listed

29° Stub Acme thread form — a shallower Acme profile for thin-walled parts and where full-depth Acme is impractical.

Right Hand	Left Hand	Pitch (TPI)	Insert Size INSL (mm)	PDX (mm)	PDY (mm)	IC (in)
3ER16STACME	3EL16STACME	16	16.0	1.1	1.0	1/4
3ER14STACME	3EL14STACME	14	16.0	1.1	1.1	1/4
3ER12STACME	3EL12STACME	12	16.0	1.2	1.2	1/4
3ER10STACME	3EL10STACME	10	16.0	1.3	1.2	1/4
3ER8STACME	3EL8STACME	8	16.0	1.5	1.4	1/4
3ER6STACME	3EL6STACME	6	16.0	1.8	1.7	1/4
4ER5STACME	4EL5STACME	5	22.0	2.3	2.1	3/8
5ER4STACME	5EL4STACME	4	27.0	2.4	2.3	5/8
5ER3STACME	5EL3STACME	3	27.0	2.9	2.9	5/8

Right Hand	Left Hand	Pitch (TPI)	Insert Size INSL (mm)	PDX (mm)	PDY (mm)	IC (in)
3NR16STACME	3NL16STACME	16	16.0	1.1	1.0	1/4
3NR14STACME	3NL14STACME	14	16.0	1.1	1.1	1/4
3NR12STACME	3NL12STACME	12	16.0	1.2	1.2	1/4
3NR10STACME	3NL10STACME	10	16.0	1.3	1.2	1/4
3NR8STACME	3NL8STACME	8	16.0	1.5	1.4	1/4
3NR6STACME	3NL6STACME	6	16.0	1.8	1.7	1/4
4NR5STACME	4NL5STACME	5	22.0	2.3	2.1	3/8
5NR4STACME	5NL4STACME	4	27.0	2.4	2.3	5/8
5NR3STACME	5NL3STACME	3	27.0	2.9	2.9	5/8

Workpiece Material	CP5230	CP5225	CP4324	NA10
P — Steel	Light intermittent — preferred	Light intermittent — preferred	Light intermittent — preferred	—
M — Stainless Steel	Light intermittent — alternative	Light intermittent — preferred	Light intermittent — alternative	—
K — Cast Iron	Light intermittent — preferred	Light intermittent — alternative	Light intermittent — preferred	—
N — Non-Ferrous Metals	—	—	—	Continuous — preferred
S — Heat-Resistant Alloys	—	—	—	—
H — Hardened Materials	—	Light intermittent — alternative	Light intermittent — preferred	—