American standard composite slot pan head screw

Category:Compound slotted screw
Number of views:order
Release date:2025-04-14 15:44:30

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Product name: Composite slot pan head screw

Implementation standard: American standard ASME/ANSI B 18.6.3 (Table 20)

Product Overview: Composite slot pan head screws can be divided into: 1. The composite of cross and slot is called eleven slot pan head screw, 2. The composite of slot and square slot is called composite square slot round head screw. 3. Square slot + cross slot + slot can also be used together. Of course, many kinds of slot types can be used for composite use. The convenience of composite slot is that different screw heads can be used for tightening. The anti-theft slot is for anti-theft effect, and the composite slot is for daily use. Although composite slot screws are very convenient to use, the torque will also be affected to a certain extent because the stress area of composite slot screws will be reduced after the slot types overlap.

Product materials: SUS304, SUS316, SUS316L, 410 and other stainless steel special materials, carbon steel (1008, 1022, 10B21, 35K, 45K), alloy steel (10B33, 40Cr, SCM435), B7, B7M, A320 L7/L7M, etc.

Product grade: A2-50, A2-70, A4-70, A4-80, B8, US grade 2, US grade 5, US grade 8, US grade 10, grade 12.9, etc.

Product surface: blackening, blue-white zinc, colored zinc, black zinc, zinc-nickel alloy, hot-dip galvanizing, hot-dip galvanizing, geomet, Dacromet, electrophoresis, Teflon, baking varnish, anti-loosening glue and other customer-specified surface treatments

Product diameter: 1#-56, 2#-56 teeth, 4#-40 teeth, 6#-32 teeth, 8#-32 teeth, 10#-24 teeth, /12#-24 teeth, 1/4-20 teeth, 5/16-18 teeth, 3/8-16 teeth, 7/16-14 teeth, 1/2-13 teeth, 9/16-12 teeth, 5/8-11 teeth, 3/4-10 teeth

Product length: 1/4 inch - 20 inches length available for selection and customization

Product size

Size unit:inch

Thread size
d

10#

12#

1/4

5/16

3/8

7/16

1/2

d
PP
d_k	Maximum
	Minimum
k	Maximum
	Minimum
n	Maximum
	Minimum
t	Maximum
	Minimum
M	Type I
	IA type
	Type III
P	Type I	Maximum
		Minimum
	IA type	Maximum
		Minimum
	Type III	Maximum
		Minimum
Wrench size	I-type
	IA type
	Type III
R	Minimum

0.0600	0.0730	0.0860	0.0990	0.1120	0.1250	0.1380	0.1640	0.1900	0.2160	0.2500	0.3125	0.3750	0.4375	0.5000
80	64	56	48	40	40	32	32	24	24	20	18	16	14	13
0.116	0.142	0.167	0.193	0.219	0.245	0.270	0.322	0.373	0.425	0.492	0.615	0.740	0.863	0.987
0.104	0.130	0.155	0.180	0.205	0.231	0.256	0.306	0.357	0.407	0.473	0.594	0.716	0.837	0.958
0.044	0.053	0.062	0.071	0.080	0.089	0.097	0.115	0.133	0.151	0.175	0.218	0.261	0.305	0.348
0.036	0.044	0.053	0.062	0.070	0.079	0.087	0.105	0.122	0.139	0.162	0.203	0.244	0.284	0.325
0.023	0.026	0.031	0.035	0.039	0.043	0.048	0.054	0.060	0.067	0.075	0.084	0.094	0.094	0.106
0.016	0.019	0.023	0.027	0.031	0.035	0.039	0.045	0.050	0.056	0.064	0.072	0.081	0.081	0.091
0.022	0.027	0.031	0.036	0.040	0.045	0.050	0.058	0.068	0.077	0.087	0.106	0.124	0.142	0.161
0.013	0.016	0.020	0.023	0.027	0.030	0.033	0.041	0.048	0.055	0.063	0.076	0.090	0.105	0.118
0.060	0.067	0.097	0.105	0.115	0.152	0.159	0.175	0.192	0.252	0.274	0.343	0.382	0.406	0.428
0.060	0.067	0.097	0.105	0.115	0.147	0.155	0.170	0.185	0.247	0.266	0.334	0.370	0.392	0.413
/	/	0.050	0.070	0.070	0,091	0.091	0.112	0.112	0.133	0.133	0.191	0.191	/	/
0.032	0.040	0.052	0.061	0.071	0.072	0.080	0.097	0.113	0.124	0.144	0.173	0.213	0.239	0.260
0.014	0.022	0.034	0.043	0.053	0.046	0.055	0.071	0.089	0.098	0.118	0.149	0.190	0.214	0.235
0.033	0.040	0.053	0.062	0.072	0,068	0.076	0.092	0.108	0.117	0.137	0.164	0.201	0.224	0.246
0.017	0.024	0.037	0.046	0.056	0.050	0.058	0.074	0.090	0.099	0.119	0.146	0.183	0.206	0.228
/	/	0.033	0.038	0.038	0.065	0.065	0.075	0.075	0.095	0,095	0.100	0.100	/	/
/	/	0.028	0.028	0.028	0.050	0.050	0.060	0.060	0.080	0.080	0.085	0.085	/	/
0	0	1	1	1	2	2	2	2	3	3	4	4	4	4
0	0	1	1	1	2	2	2	2	3	3	4	4	4	4
/	/	00	0	0	1R	1R	2R	2R	3R	3R	4R	4R	/	/
0.005	0.005	0.010	0.010	0.010	0.015	0.015	0.015	0.020	0.025	0.035	0.040	0.040	0.050	0.055

①, Material: Unhardened carbon steel. Unless otherwise specified, machine screws shall be made of non-heat treated low carbon steel, such as grades 1006~1022, hardness HRB69-100.
②, Material: Hardened carbon steel. If hardened machine screws are specified, they shall be made of medium and low carbon steel, such as grades 1018~1038 with or without boron, hardened to HRC25-38.
③, For stainless steel and non-ferrous metal materials, see below: Related material standards or grades