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SS Nylon Insert Lock Nut

18-8 stainless steel nylon insert lock nuts are hex nuts that have a nylon collar insert in one end of the nut. The nylon insert increases friction on the screw thread, which resists loosening. Dimensional specifications are governed by ASME B18.16.6. The nylon insert lock nut is an economic locking nut and ideal in applications where vibration or motion could loosen or undo the nut.

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Governing Standards
Dimensional Specifications

Dimensional Specifications

Dimensional Specifications18-8 Stainless Steel

Per ASME B18.16.6-2017
Nominal Diameter		UNC	UNF	A			B	C		D
				Width Across Flats			Width Across Corners	Thickness		Hex Height
				Basic	Max	Min	Min	Max	Min	Min
#2	0.086	56		1/4	0.251	0.243	0.268	0.153	0.133	0.081
#3	0.099	48		1/4	0.251	0.243	0.268	0.153	0.133	0.081
#4	0.112	40		1/4	0.251	0.243	0.268	0.153	0.133	0.081
#5	0.125	40		1/4	0.251	0.243	0.268	0.153	0.133	0.081
#6	0.138	32	40	5/16	0.313	0.305	0.339	0.188	0.168	0.103
#8	0.164	32	36	11/32	0.345	0.336	0.374	0.239	0.219	0.140
#10	0.190	24	32	3/8	0.376	0.243	0.410	0.249	0.229	0.140
#12	0.216	24	28	1/4	0.439	0.430	0.482	0.328	0.298	0.225
1/4	0.250	20	28	7/16	0.439	0.430	0.482	0.328	0.298	0.225
5/16	0.313	18	24	1/2	0.502	0.492	0.552	0.359	0.329	0.250
3/8	0.375	16	24	9/16	0.564	0.553	0.622	0.468	0.438	0.335
7/16	0.438	14	20	5/8	0.627	0.616	0.698	0.468	0.438	0.324
1/2	0.500	13	20	3/4	0.752	0.741	0.837	0.609	0.579	0.464
9/16	0.563	12	18	7/8	0.877	0.865	0.978	0.656	0.626	0.469
5/8	0.625	11	18	15/16	0.940	0.928	1.051	0.765	0.735	0.593
3/4	0.750	10	16	1 1/8	1.064	1.052	1.191	0.890	0.861	0.742
7/8	0.875	9	14	1 5/16	1.252	1.239	1.403	0.999	0.969	0.790
1	1.000	8	14	1 1/2	1.440	1.427	1.615	1.078	1.016	0.825
1 1/8	1.125	7	12	1 11/16	1.627	1.614	1.826	1.203	1.410	0.930
1 1/4	1.250	7	12	1 7/8	1.815	1.801	2.038	1.422	1.360	1.125
1 1/2	1.500	6	12	2 1/4	2.197	2.159	2.444	1.640	1.578	1.313

All dimensions are in inches.

SS Nylon Insert Lock Nut

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Diameter Thread Pitch Width Across Flats Height of Nut Item # Availability Price Quantity UOM

1/4

0.1330

NNIS 40000

In Stock

$0.04087/EA

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#4-40 18-8 STAINLESS STEEL NYLON INSERT LOCK NUT

$0.04087/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.04087/EA
2320	$0.03828/EA
9250	$0.03409/EA
36970	$0.02259/EA

5/16

0.1680

NNIS 60000

In Stock

$0.07062/EA

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#6-32 18-8 STAINLESS STEEL NYLON INSERT LOCK NUT

$0.07062/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.07062/EA
1870	$0.06616/EA
7470	$0.05892/EA
29870	$0.03904/EA

5/16

1/2

0.3290

NNIS0310000

In Stock

$0.10208/EA

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5/16-18 18-8 STAINLESS STEEL NYLON INSERT LOCK NUT

$0.10208/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.10208/EA
820	$0.09568/EA
3280	$0.08508/EA
14740	$0.05669/EA

5/16

1/2

0.3290

NNIS031NF00

In Stock

$0.29904/EA

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5/16-24 18-8 STAINLESS STEEL NYLON INSERT LOCK NUT

$0.29904/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.29904/EA
820	$0.28029/EA
3280	$0.24923/EA
14740	$0.16608/EA

SS Nylon Insert Lock Nut

Technical Data

Governing Standards

Governing Standards18-8 Stainless Steel

Dimensional Specifications

Dimensional Specifications18-8 Stainless Steel

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Width Across Flats

#4-40 18-8 STAINLESS STEEL NYLON INSERT LOCK NUT

#6-32 18-8 STAINLESS STEEL NYLON INSERT LOCK NUT

5/16-18 18-8 STAINLESS STEEL NYLON INSERT LOCK NUT

5/16-24 18-8 STAINLESS STEEL NYLON INSERT LOCK NUT