Cross recessed round head tapping screws with collar -1

Cross recessed round head tapping screws with collar -2

Cross recessed round head tapping screws with collar -3

Cross Recessed Round Head Tapping Screws with Collar

The self-tapping screws are designed with a cross grooved pan head with washers, providing a solid connection without the need for pre-drilling while ensuring an even distribution of enhanced grip and load.

Product Technical Parameters

●Material: Carbon Steel and Stainless Steel
●Surface Treatment: Galvanized, Nickel Plated, Black Oxide
●Metric Strength Grades: 4.8	●Imperial Strength Grades: 2
●Metric Thread Diameter: ST2.9~ ST6.3	●Imperial Thread Diameter: #5 ~ 1/2
●Metric Thread Length: 5 ~ 60	●Imperial Thread Length: 1/8 ~ 12

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Product Description of Cross Recessed Round Head Tapping Screws with Collar

Function and use: Integrated screw with cross slot drive, pan head and built-in washer design, with easy installation characteristics, can self-drill thread in metal or plastic materials, significantly enhance its holding force.
Application: Widely used in electronic, electrical and sheet metal assembly fields, especially for the pursuit of flat appearance and enhanced bearing surface scenes, and without prior hole processing.
Needs solved: Built-in washers optimize load distribution and reduce the possibility of material deformation, thereby increasing the reliability and durability of the fastening system.

Wanhong Fasteners supply high quality cross recessed round head tapping screws with collar, various sizes and materials, suitable for a wide range of industrial applications.

Data Sheet of Cross Recessed Round Head Tapping Screws with Collar

Cross recessed round head tapping screws with collar Dimensions Chart: Based on DIN 968

(mm)	ST2.9	ST3.5	ST4.2	ST4.8	ST5.5	ST6.3
P	1.1	1.3	1.4	1.6	1.8	1.8
a max	1.1	1.3	1.4	1.6	1.8	1.8
da max	3.5	4.1	4.9	5.6	6.3	7.3
dk max	7.5	9	10	11.5	13	14.5
dk min	6.92	8.42	9.42	10.8	12.3	13.8
k max	2.35	2.6	3.05	3.55	3.8	4.55
k min	2.1	2.35	2.75	3.25	3.5	4.25
h max	0.8	0.9	1.1	1.35	1.6	1.8
h min	0.6	0.7	0.9	1.05	1.2	1.4
r min	0.1	0.1	0.2	0.2	0.25	0.25
No.	1	2	2	2	3	3
M	3	4.2	4.6	5	6.5	7.1
t min	1.35	1.4	1.8	2.26	2.49	3
t max	1.8	2.03	2.46	2.87	3.15	3.66

Cross recessed round head tapping screws with collar Dimensions Chart: Based on ASME/ANSI B18.6.3-Table 39

(inch)	#5	#6	#7	#8	#10	#12	1/4	5/16	3/8	7/16	1/2
P	20	20	19	18	16	14	14	12	12	10	10
dk	0.177	0.218	0.238	0.259	0.3	0.341	0.396	0.494	0.593	0.691	0.79
dc max	0.261	0.321	0.35	0.38	0.439	0.498	0.576	0.719	0.861	1.004	1.146
dc min	0.243	0.301	0.33	0.358	0.416	0.473	0.548	0.687	0.825	0.963	1.101
k max	0.079	0.096	0.105	0.113	0.13	0.148	0.17	0.211	0.253	0.294	0.335
k min	0.067	0.084	0.092	0.101	0.118	0.134	0.157	0.197	0.238	0.278	0.319
h	0.03	0.04	0.04	0.04	0.05	0.05	0.05	0.06	0.06	0.07	0.09
M	0.116	0.147	0.15	0.161	0.177	0.228	0.244	0.292	0.348	0.366	0.383
No.	1	2	2	2	2	3	3	3	4	4	4
t max	0.065	0.061	0.065	0.076	0.093	0.094	0.107	0.156	0.17	0.19	0.21
t min	0.044	0.033	0.037	0.048	0.066	0.066	0.08	0.129	0.144	0.165	0.184
d max	0.114	0.139	0.154	0.166	0.189	0.215	0.246	0.315	0.38	0.44	0.504
d min	0.108	0.132	0.147	0.159	0.182	0.208	0.237	0.306	0.371	0.429	0.493
d1 max	0.086	0.104	0.115	0.122	0.141	0.164	0.192	0.244	0.309	0.359	0.423
d1 min	0.082	0.099	0.109	0.116	0.135	0.157	0.185	0.236	0.299	0.349	0.413