Bestimmung der Gewindeabmessung
Amerikanisches UNC-Normgewinde

Gewinde	Außen-DM (Zoll)	Steigung (mm)	Außen-DM (mm)	Kernloch-DM (mm)	Gänge je Zoll
N 1 - 64 UNC	0,073	0,397	1,854	1,50	64
N 2 - 56 UNC	0,086	0,453	2,184	1,80	56
N 3 - 48 UNC	0,099	0,529	2,515	2,10	48
N 4 - 40 UNC	0,112	0,635	2,845	2,35	40
N 5 - 40 UNC	0,125	0,635	3,175	2,65	40
N 6 - 32 UNC	0,138	0,794	3,505	2,85	32
N 8 - 32 UNC	0,164	0,794	4,166	3,50	32
N 10 - 24 UNC	0,190	1,058	4,826	4,00	24
N 12 - 24 UNC	0,216	1,058	5,486	4,65	24
1/4" - 20 UNC	0,250	1,270	6,350	5,35	20
5/16" - 18 UNC	0,313	1,411	7,938	6,80	18
3/8" - 16 UNC	0,375	1,587	9,525	8,25	16
7/16" - 14 UNC	0,438	1,814	11,112	9,65	14
1/2" - 13 UNC	0,500	1,954	12,700	11,15	13
9/16" - 12 UNC	0,563	2,117	14,288	12,60	12
5/8" - 11 UNC	0,625	2,309	15,875	14,05	11
3/4" - 10 UNC	0,750	2,540	19,050	17,00	10
7/8" - 9 UNC	0,875	2,822	22,225	20,00	9
1" - 8 UNC	1,000	3,175	25,400	22,85	8
1 1/8" - 7 UNC	1,125	3,628	28,575	25,65	7
1 1/4" - 7 UNC	1,250	3,628	31,750	28,85	7
1 3/8" - 6 UNC	1,375	4,233	43,925	31,55	6
1 1/2" - 6 UNC	1,500	4,233	38,100	34,70	6
1 3/4" - 5 UNC	1,750	5,080	44,450	40,40	5
2" - 4 1/2 UNC	2,000	5,644	50,800	46,30	4 1/2
2 1/4" - 4 1/2 UNC	2,250	5,644	57,150	52,65	4 1/2
2 1/2" - 4 UNC	2,500	6,350	63,500	58,50	4
2 3/4" - 4 UNC	2,750	6,350	69,850	64,75	4
3" - 4 UNC	3,000	6,350	63,500	71,10	4
3 1/4" - 4 UNC	3,250	6,350	82,550	77,45	4
3 1/2" - 4 UNC	3,500	6,350	88,900	83,80	4
3 3/4" - 4 UNC	3,750	6,350	95,250	90,15	4
4" - 4 UNC	4,000	6,350	101,600	96,50	4