Thread Cutting Screws Specifications

Thread Cutting Screw

TYPE 1

The Shakeproof Type 1 Thread-Cutting Screw features a thread-cutting slot which actually stimulates true tapping action
as the screw is driven. Placed off center, this slot provides a sharp serrated cutting edge ta
form a perfect mating thread. Hole preporation is simple: just punch or drill and drive the
Shakeproof Type 1 tight!

See Pages 4 and 5
for recommended uses.

TYPE 23

Shakeproof Type 23 Thread- Cutting Screw is the all-purpose thread-
cutting screw. Its wide cutting slot with acute cutting angle assures fast, easy cutting and ample chip clearance. Type 23 is especially
recommended for zinc and cast iron, aluminum die castings and other soft metals. For tough applications in hard metal or plastics,

See pages 4 and 5 for recommended uses.

Screw Size	Threads per inch	C		E
		Point Diameter		Taper Length
		Point Diameter		4 Pitches		3 Pitches
		Max	Min	Max	Min	Max	Min
2	56	.067	.061	.080	.062	.062	.045
2	64	.070	.064	.070	.055 -	.055	.039
3	48	.077	.070	.094	.073	.073	.052
3	56	.080	.074	.080	.062	.062	.045
4	40	.086	.077	.112	.088	.088	.062
4	48	.090	.083	.094	.073	.073	.052
5	40	.099	.090	.112	.088	.088	.062
5	44	.101	.093	.102	.080	.080	.057
6	32	.106	.095	.141	.109	.109	.078
6	40	.112	.103	.112	.088	.088	.062
8	32	.132	.121	.141	.109	.109	.078
8	36	.135	.125	.125	.097	.097	.069
10	24	.147	.133	.188	.146	.146	.104
10	32	.158	.147	.141	.109	.109	.078
12	24	.173	.159	.188	.146	.146	.104
12	28	.179	.167	.161	.125	.125	.089
1/4	20	.198	.181	.225	.175	.175	.125
1/4	28	.213	.201	.161	.125	.125	.089

NOTE:
1. For Head Proportions1 see Head Dimension Tables.
2. Screws having a length of 8 pitches or less will have a taper length of 3 1/2—2 1/2 times the pitch distance. Longer length screws will have a taper length of 4 1/2 —3 1/2 times the pitch distance.

Thread Cutting Screws
Click on the Items Below:

· Thread-Cutting Screws
· Thread Cutting ScrewsTypes
· Type 1 and 23 Screws
· Type 25 For Plastics Screws
· Screw Selections
· Thread Cutting Screw Guide
· Point Specifications
· Torque Specifications
· Special Heads and Points
· Flat Head
· Pan Head
· Hex Head
· Hex Washer Head
· Oval Head
· Sems and Nib Screws

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