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美标UNC粗牙螺纹UNF标细牙螺纹攻丝底孔直径及公差

发布时间:2022-08-02 金属切削，机械制造

UNC 美标粗牙螺纹攻丝底孔直径及公差

螺纹直径	螺距 Gg/0“ TPI	螺纹直径 Ø mm	底孔直径 Ø mm	底孔直径 Ø mm min	底孔直径-Ø mm max
Nr. 1	64	1.854	1.550	1.425	1.582
Nr. 2	56	2.184	1.850	1.694	1.872
Nr. 3	48	2,515	2,10	1,941	2,146
Nr. 4	40	2,845	2,35	2,156	2,385
Nr. 5	40	3,175	2,65	2,487	2,697
Nr. 6	32	3,505	2,85	2,642	2,896
Nr. 8	32	4,166	3,50	3,302	3,531
Nr. 10	24	4,826	3,90	3,683	3,962
Nr. 12	24	5,486	4,50	4,343	4,597
1/4	20	6,350	5,10	4,976	5,268
516	18	7,938	6,60	6,411	6,734
38	16	9,525	8,00	7,805	8,164
716	14	1,112	9,40	9,149	9,550
12	13	12,70	10,80	10,584	11,013
916	13	14,288	12,20	11,996	12,456
58	11	15,875	13,50	13,376	13,868
34	10	19,050	16,50	16,299	16,833
78	9	22,225	19,50	19,169	19,748
1	8	25,400	22,25	21,963	22,598
1 1/8	7	28,575	25,00	24,648	25,349
1 1/4	7	31,750	28,00	27,823	28,524
1 3/8	6	34,925	30,75	30,343	31,120
1 1/2	6	38,100	34,00	33,518	34,295
1 3/4	5	44,450	39,50	38,951	39,814
2	4.5	50,800	45,00	44,689	45,598

UNF 美标细牙螺纹

螺纹直径 Ø“ -	螺距 Gg/1“ TPI	螺纹直径 Ø mm	底孔直径 Ø mm	底孔直径 Ø mm min	底孔直径-Ø mm max
Nr. 1	72	1,854	1,55	1,473	1,613
Nr. 2	64	2,184	1,85	1,755	1,913
Nr. 3	56	2,515	2,15	2,024	2,197
Nr. 4	48	2,845	2,40	2,271	2,459
Nr. 5	44	3,175	2,70	2,550	2,741
Nr. 6	40	3,505	2,95	2,819	3,023
Nr. 8	36	4,166	3,50	3,404	3,607
Nr. 10	32	4,826	4,10	3,962	4,166
Nr. 12	28	5,486	4,60	4,496	4,724
1/4	28	6,350	5,50	5,367	5,580
5/16	24	7,938	6,90	6,792	7,038
3/8	24	9,525	8,50	8,379	8,626
7/16	20	11,112	9,90	9,738	10,030
1/2	20	12,700	11,50	11,326	11,618
9/16	18	14,288	12,90	12,761	13,084
5/8	18	15,875	14,50	14,348	14,671
34	16	19,050	17,50	17,330	17,689
7/8	14	22,225	20,40	20,262	20,663
1	12	25,400	23,25	23,109	23,569
1 1/8	12	28,575	26,50	26,284	26,744
1 1/4	12	31,750	29,50	29,459	29,919
1 3/8	12	34,925	32,75	32,634	33,094
1 1/2	12	38,100	36,00	35,809	36,269