ASME B5.1M T-Nuts

ASME B5.1M T-Nuts are used when machine threads are needed in wood for permanent installations. They allow lockdowns and reassembly. It has very distinct structure consist of a internally threaded barrel with three or four prongs outside adjacent to the barrel. Prongs prevent the tee nut from rotating as the bolt is tightened.

Type : Nuts can be Manufactured in Full Thread, Half Thread and Double Side Thread Configurations.
Manufacturing Process Adopted are Cold Forged, Hot Forged & Bar Stock Machined. Nuts without Threading, Forged Blanks, Hex cut pieces can be manufactured on request along with CNC machined Process.

Size Range : Metric Size Range from M1.0 upto M150 in accordance with ANSI/ASME B1.13M Edition 2012.
Imperial size Range from #0000 upto #12 and 1/4" upto 6" in accordance with ANSI/ASME B1.1 Edition 2012.

Nominal T-Bolt Size^a		Width of Tongue A₃				Tap for Studb E₃		Width of Nut B₃				Height of Nut C₃				Total Thickness Including Tongue^c K₃		Length of Nut^c L₃		Rounding of Corners
		Width of Tongue A₃				Tap for Studb E₃		Width of Nut B₃				Height of Nut C₃								R₃		W₃
		inch		mm		inch	mm	inch		mm		inch		mm						inch	mm	inch	mm
inch	mm	max	min	max	min	UNC-3B	ISO ^d	max	min	max	min	max	min	max	min	inch	mm	inch	mm	max	max	max	max
0.312	8	0.33	0.32	8.7	8.5	0.250-20	M6	0.562	0.531	15	14	0.188	0.172	6	5.6	0.281	9	0.562	18	0.02	0.5	0.03	0.8
0.375	10	0.418	0.408	11	10.75	0.312-18	M8	0.688	0.656	18	17	0.25	0.234	7	6.6	0.375	10.5	0.688	20	0.02	0.5	0.03	0.8
0.5	12	0.543	0.533	13.5	13.25	0.375-1	6M10	0.875	0.844	22	21	0.312	0.297	8	7.6	0.531	12	0.875	23	0.02	0.5	0.06	1.5
0.625	16	0.668	0.658	17.25	17	0.500-13	M12	1.125	1.094	28	27	0.406	0.391	10	9.6	0.625	15	1.125	27	0.03	0.8	0.06	1.5
0.75	20	0.783	0.773	20.5	20.25	0.625-11	M16	1.312	1.281	34	33	0.531	0.5	14	13.2	0.781	21	1.312	35	0.03	0.8	0.06	1.5
1	24	1.033	1.018	26.5	26	0.750-10	M20	1.688	1.656	43	42	0.688	0.656	18	17.2	1	27	1.688	46	0.03	0.8	0.06	1.5
1.25	30	1.273	1.258	33	32.5	1.000-8	M24	2.062	2.031	53	52	0.938	0.906	23	22.2	1.312	34	2.062	53	0.03	0.8	0.06	1.5
1.5	36	1.523	1.508	39.25	38.75	1.250-7	M30	2.5	2.469	64	63	1.188	1.156	28	27.2	1.625	42	2.5	65	0.03	0.8	0.06	1.5
. . .	42	. . .	. . .	46.75	46.25	. . .	M36	. . .	. . .	75	74	. . .	. . .	32	30.5	. . .	48	. . .	75	. . .	1	. . .	2
. . .	48	. . .	. . .	52.5	51.75	. . .	M42	. . .	. . .	85	84	. . .	. . .	36	34.5	. . .	54	. . .	85	. . .	1	. . .	2
a T-slot dimensions to fit the above nuts will be found in Table 1. b For tolerances of inch threads see page 1736. c No tolerances are given for "Total Thickness" or "Nut Length" as they need not be held to close limits. d Metric tapped thread grade and tolerance position is 5H (see page 1790).