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Unit:inch

Flat Round Head with Rings on Undertake Surface Welding Screws

IFI 148 (TC4) - 2002

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美标IFI 148 (TC4) - 2002 IFI148 148IFI Flat Round Head with Rings on Undertake Surface Welding Screws

Nominal Diameter
d

2#

4#

6#

8#

10#

1/4

5/16

3/8

1/2

PP	UNC
d_k	max
	min
k	max
	min
h	max
	min
d₂
d₁	max
	min
d₃	max
	min
H	max
	min

56	48	32	32	24	20	18	16	13
0.200	0.250	0.310	0.350	0.400	0.510	0.635	0.760	0.945
0.180	0.230	0.290	0.330	0.380	0.485	0.610	0.735	0.915
0.036	0.036	0.046	0.052	0.068	0.083	0.099	0.114	0.146
0.026	0.026	0.036	0.042	0.058	0.073	0.089	0.104	0.136
0.005	0.006	0.007	0.008	0.009	0.01	0.012	0.013	0.014
0.002	0.003	0.004	0.005	0.006	0.007	0.008	0.009	0.01
0.1	0.13	0.17	0.19	0.22	0.282	0.312	0.375	0.5
0.035	0.045	0.055	0.065	0.075	0.095	0.125	0.145	0.175
0.025	0.035	0.045	0.055	0.065	0.085	0.115	0.135	0.165
0.17	0.215	0.27	0.305	0.35	0.455	0.57	0.69	0.87
0.15	0.195	0.25	0.285	0.331	0.43	0.545	0.665	0.845
0.016	0.017	0.022	0.027	0.032	0.042	0.047	0.052	0.062
0.012	0.013	0.018	0.023	0.028	0.038	0.043	0.048	0.058

Suppliers

Best price if from GlobalFastener.com.

Shanghai Kinsom Precision Hardware Co.,Ltd

Tina Cheung
+86-18114615363
+86-512-57889792

material:carbon steel，copper，Stainless steel 304 ,316,aluminum;Specifications:M2-M20 , 8-32 ,1/4-20 ,10-24 etc;Nominal length:5-200mm;Surface treatment:according to customers' requirements；Zinc plated, Zinc nickel plated, Dacromet, polished, electrophoresis,ect.

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