Cold heading Service

ASME B18.6.3 Slotted Pan Head Self Tapping Screw

ASME B18.6.3 Slotted Pan Head Self Tapping Screws are commonly used in assemblies where the fastener remains visible and a rounded head profile is preferred. The pan head provides a relatively broad bearing surface, while the slotted drive allows installation with a flat-blade screwdriver. Combined with self-tapping threads, this design offers a practical fastening solution for sheet metal components, electrical enclosures, and general equipment assembly.

Our production capabilities include cold heading, thread rolling, and dedicated slot milling equipment for machining the drive recess in screw heads. As an ISO 9001-certified company, we pay close attention to pan head dimensions, slot width and depth, thread accuracy, and finished surface condition. Material grades are checked against order specifications, while heat treatment is controlled to achieve the required mechanical properties. These production and inspection steps help us meet the dimensional and performance requirements specified for each order.

ASME B18.6.3 Slotted Pan Head Self Tapping Screw Stainless Steel

ASME B18.6.3 Slotted Pan Head Self Tapping Screw

Specification:

Item	Specification
Standard	ASME B18.6.3
Product Type	Slotted Pan Head Self Tapping Screw
Thread Diameter	#0-1/2"
Point Type	Type AB Pointed Tip
Material	Carbon Steel, Stainless Steel
Steel Property	SAE J933
Stainless Steel Property	ISO 3506-4
Surface Treatment	Black Oxidation,Zinc Plated,Bright Finish
Inspection	Dimensions,Thread,Hardness,Coating

Dimension Chart:

Drawing of ASME B18.6.3 Slotted Pan Head Self Tapping Screw

Mon	#0	#1	#2	#3	#4	#5	#6	#7	#8	#10	#12	1/4	5/16	3/8	7/16	1/2
P	48	42	32	28	24	20	20	19	18	16	14	14	12	12	10	10
dk max	0.116	0.142	0.167	0.193	0.219	0.245	0.27	0.296	0.322	0.373	0.425	0.492	0.615	0.74	0.863	0.987
dk min	0.104	0.13	0.155	0.18	0.205	0.231	0.256	0.281	0.306	0.357	0.407	0.473	0.594	0.716	0.837	0.958
k max	0.039	0.046	0.053	0.06	0.068	0.075	0.082	0.089	0.096	0.11	0.125	0.144	0.178	0.212	0.247	0.281
k min	0.031	0.038	0.045	0.051	0.058	0.065	0.072	0.079	0.085	0.099	0.112	0.13	0.162	0.195	0.228	0.26
n max	0.023	0.026	0.031	0.035	0.039	0.043	0.048	0.048	0.054	0.06	0.067	0.075	0.084	0.094	0.094	0.106
n min	0.016	0.019	0.023	0.027	0.031	0.035	0.039	0.039	0.045	0.05	0.056	0.064	0.072	0.081	0.081	0.091
t max	0.022	0.027	0.031	0.036	0.04	0.045	0.05	0.054	0.058	0.068	0.077	0.087	0.106	0.124	0.142	0.161
t min	0.014	0.018	0.022	0.026	0.03	0.034	0.037	0.041	0.045	0.053	0.061	0.07	0.085	0.1	0.116	0.131
d max	0.06	0.075	0.088	0.101	0.114	0.13	0.139	0.154	0.166	0.189	0.215	0.246	0.315	0.38	0.44	0.504
d min	0.054	0.069	0.082	0.095	0.108	0.123	0.132	0.147	0.159	0.182	0.208	0.237	0.306	0.371	0.429	0.493
d1 max	0.036	0.049	0.064	0.075	0.086	0.094	0.104	0.115	0.122	0.141	0.164	0.192	0.244	0.309	0.359	0.423
d1 min	0.033	0.046	0.06	0.071	0.082	0.09	0.099	0.109	0.116	0.135	0.157	0.185	0.236	0.299	0.349	0.413

Mechanical Property:

ASME B18.6.3 Slotted Pan Head Self Tapping Screws must withstand the stresses encountered during installation while maintaining their head and thread integrity. Torsional strength is important as the threads engage with the workpiece, while the pan head and slotted drive must resist damage under driving forces. Mechanical requirements depend on the screw material and applicable specification.

SAE J933 – Carbon Steel Self-Tapping Screws

For carbon steel slotted pan head self-tapping screws, hardness and torsional strength affect their ability to form mating threads without breaking during installation. Proper heat treatment helps achieve the required hardness, while adequate strength is essential to prevent the slotted recess or pan head from being damaged under driving torque.

ISO 3506-4 – Stainless Steel Self-Tapping Screws

Stainless steel slotted pan head self-tapping screws require a balance between mechanical performance and corrosion resistance. Their properties depend on the stainless steel grade and applicable requirements.

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