Nominal Thread Size		F		C	H		T
		ACROSS		ACROSS	REG. PATTERN		THIN PATTERN
		FLATS		CORNERS	THICKNESS		THICKNESS
		min	max	ref	min	max	min	max
1	0.0730	0.243	0.251	0.268	0.133	0.153	---	---
2	0.0860	0.243	0.251	0.268	0.133	0.153	0.094	0.124
3	0.0990	0.243	0.251	0.268	0.133	0.153	0.094	0.124
4	0.1120	0.243	0.285	0.268	0.133	0.153	0.094	0.124
5	0.1250	0.243	0.251	0.268	0.133	0.153	0.094	0.124
6	0.1380	0.305	0.313	0.339	0.168	0.188	0.110	0.140
8	0.1640	0.336	0.345	0.374	0.219	0.239	0.157	0.187
10	0.1900	0.367	0.376	0.410	0.229	0.249	0.157	0.187
12	0.2160	0.430	0.439	0.482	0.298	0.328	0.188	0.218
1/4	0.2500	0.430	0.439	0.482	0.298	0.328	0.188	0.218
5/16	0.3125	0.492	0.502	0.552	0.329	0.359	0.235	0.265
3/8	0.3750	0.553	0.564	0.622	0.438	0.468	0.251	0.281
7/16	0.4370	0.616	0.627	0.698	0.438	0.468	0.298	0.328
1/2	0.5000	0.741	0.752	0.837	0.579	0.609	0.298	0.328
9/16	0.5620	0.865	0.877	0.978	0.626	0.656	0.344	0.374
5/8	0.6250	0.928	0.940	1.051	0.735	0.765	0.376	0.406
3/4	0.7500	1.052	1.064	1.191	0.860	0.890	0.391	0.421
7/8	0.8750	1.239	1.252	1.403	0.969	0.999	0.454	0.484
1"	1.0000	1.427	1.440	1.615	1.016	1.078	0.516	0.578

The function of the nylon insert locknut is to resist loosening. An all metal locknut depends on high pressure metal-to-metal contact to provide locking action. Vibration or re-installation may cause rapid loss of effectiveness as contacts are worn. With a nylon insert locknut, the nylon flows between the threads until a uniform pressure is exerted against the thread crests. The nylon is also compressed between the flanks, creating dual action - absorbing vibration as well as resisting rotation. The locking quality is only on e factor to consider in a locknut. Mechanical strength, thermal properties, resistance to chemicals, elastic recovery and durability all contribute to the locknut's characteristics.

MECHANICAL STRENGTH Nylon has high tensile strength, hardness, impact strength, compression, stiffness and rigidity. The low friction coupled with high tensile creates excellent abrasion resistance.

THERMAL PROPERTIES Most nylon insert locknuts are manufactured from Zytel 101 which has an effective temperature range up to 250 ° F. Zytel 103 has a higher effective range to 350 ° F and can be special ordered for your higher heat applications. The insert is available in a wide range of colors: white, green, yellow, red, orange, purple and blue to name a few. The coloring does not add or take away from the performance and is mainly used to identify the manufacturer. Nylon is the most resistant thermo-=plastic resin today. As temperatures increase, it will retain resistance to softening until the maximum degree is reached at which point it melts immediately. On the other hand, with a decrease in temperature, the tensile strength increases and it will have excellent flexibility allowing locking action to continue even in sub-zero temperatures.

CHEMICAL RESISTANCE Nylon is highly resistant to many oils, diluted mineral oils, organic acids, alkalies, solvents and salt solutions. A list of these are available from your salesperson.

ELASTIC RECOVERY Nylon will try to return to its original shape after the mating thread has been removed therefore the nut can be reused many times. The exact reusability depends on thread roughness, minimum breakaway torque acceptability and other factors.

DURABILITY Zytel was developed in 1944 by Dupont. At that time a sample test was made which proved a nylon insert locknut can properly function for at least 30 years. Through on-going tests, it's been proven that under ideal conditions a locknut will continue to function properly long past its life expectancy.

Thin pattern locknuts are approximately 25% thinner than regular pattern locknuts. The nylon insert coloring may vary as may the number of stake marks, according to the manufacturer's option. Miniature patterns are also available. Ask your salesperson for these dimensions.