Screw Thread Insert Tap (Sti Taps)

• Standard: Standard
• Coating: Uncoated
• Material: High Speed Steel
• Transport Package: plastic box
• Specification: m2 to m52
• Trademark: stc
• Origin: china
• HS Code: 82074000
• Production Capacity: 5000pcs/month

Product Description

Before screw thread insert installation, the drilled hole has to be tapped with a STI hand tap or machine tap of the correct tap size.

Types of STI Taps available include:
1. Standard Plug screw thread insert taps (4-Thread Chamfer): Easy starting for through-holes and blind holes.

2. Standard Bottoming screw thread insert taps (2-Thread Chamfer): Ideal for blind holes that are drilled to a minimum depth.

3. Spiral Pointed Plug screw thread insert taps (4-Thread Chamfer): Free-cutting for use in long through-holes and in blind holes with chip clearance.

4. Spiral Flute Bottoming screw thread insert taps (2-Thread Chamfer): Pulls chips out of deep or blind holes in soft materials.

thread size	overall length	thread length	shank Dia.	Square drive		thread size	overall length	thread length	shank Dia.	Square drive
2-56	1.875	0.562	0.141	0.110		3-56	1.937	0.625	0.141	0.110
3-48	1.937	0.625	0.141	0.110		4-48	2.000	0.687	0.141	0.110
4-40	2.000	0.687	0.141	0.110		6-40	2.125	0.750	0.168	0.131
5-40	2.125	0.750	0.168	0.131		8-36	2.375	0.937	0.220	0.165
6-32	2.375	0.875	0.194	0.152		10-32	2.500	1.000	0.255	0.191
8-32	2.375	0.937	0.220	0.165		12-28	2.718	1.125	0.318	0.238
10-24	2.500	1.000	0.255	0.191		1/4-28	2.718	1.125	0.318	0.238
12-24	2.718	1.125	0.318	0.238		5/16-24	2.937	1.250	0.381	0.286
1/4-20	2.718	1.125	0.318	0.238		3/8-24	3.156	1.438	0.323	0.242
5/16-18	2.937	1.250	0.381	0.286		7/16-20	3.375	1.656	0.367	0.275
3/8-16	3.375	1.656	0.367	0.275		1/2-20	3.593	1.656	0.429	0.322
7/16-14	3.593	1.656	0.429	0.322		9/16-18	3.812	1.812	0.480	0.360
1/2-13	3.812	1.812	0.480	0.360		5/8-18	4.031	1.812	0.542	0.406
9/16-12	4.031	1.812	0.542	0.406		3/4-16	4.468	2.000	0.652	0.489
5/8-11	4.250	2.000	0.590	0.442		7/8-14	5.125	2.500	0.800	0.600
3/4-10	4.687	2.218	0.697	0.523		1-12	5.437	2.562	0.896	0.672
7/8-9	5.125	2.500	0.800	0.600		1-14	5.437	2.562	0.896	0.672
1-8	5.750	2.562	1.021	0.766		11/8-12	5.750	2.562	1.021	0.766
11/8-7	6.062	3.000	1.108	0.831		11/4-12	6.062	3.000	1.108	0.831
11/4-7	6.375	3.000	1.233	0.925		13/8-12	6.375	3.000	1.233	0.925
13/8-6	6.687	3.187	1.305	0.979		11/2-12	6.687	3.187	1.305	0.979
11/2-6	7.000	3.187	1.430	1.072

                                   Metric Series

thread size	overall length	thread length	shank Dia.	Square drive
M2 x 0.4	45	10	2.80	2.24
M2.2 x 0.45	48	11	3.15	2.50
M2.5 x 0.45	48	11	3.15	2.50
M3 x 0.5	50	13	3.55	2.80
M3.5 x 0.6	53	13	4.50	3.55
M4 x 0.7	58	16	5.00	4.00
M5 x 0.8	66	19	6.30	5.00
M6 x 1	72	22	8.00	6.30
M7 x1	72	22	9.00	7.10
M8 x 1.25	80	24	10.00	8.00
M9 x 1.25	85	25	8.00	6.30
M10 x 1.5	89	29	9.00	7.10
M11 x 1.5	89	29	9.00	7.10
M12 x 1.75	95	30	11.20	9.00
M14 x 2	102	32	12.50	10.00
M15 x 2	112	37	14.00	11.20
M16 x 2	112	37	14.00	11.20
M18 x 2.5	118	38	16.00	12.50
M20 x 2.5	130	45	18.00	14.00
M22 x 2.5	135	48	20.00	16.00
M24 x 3	135	48	20.00	16.00
M27 x 3	151	51	22.40	18.00
M30 x 3.5	162	57	25.00	20.00
M30 x 3	162	57	25.00	20.00
M33 x 3.5	170	60	28.00	22.40
M36 x 4	170	60	28.00	22.40
M39 x 4	187	67	31.50	25.00
M42 x 4.5	187	67	31.50	25.00
M42 X 4	200	70	35.50	28.00
M52 X 5	221	76	40.00	31.50