What is a Grade F nut?

F. This nut grade is for use with grade 5 bolts and usually denotes hex flange nuts.

What is a Grade F flange nut?

Available in hard-to-find Grade F (Grade 5). Features a nylon locking element that resists vibration when engaged on the threads of a larger mating part.

What is a Grade C lock nut?

Grade C all metal locknuts are made to the specifications of Industrial Fastener Institutes standard IFI 100/107. Dimensional specifications are governed by ASME B18. 16.6. All metal lock nuts are resistant to high temperatures and high chemical exposures, as they are made from one material.

What is Grade G in nuts?

Grade G lock nuts have a material Proof Load of 150,000 PSI and a strength equivalent to Grade 8 hex nuts. They feature a Black Phosphate and Oil finish as standard.

What is the strongest nut grade?

The strength of a bolt is typically specified by its grade, and the strongest commonly used bolt grades are Grade 8.8, Grade 9.8, Grade 10.9, and Grade 12.9. These grades are commonly used in construction, automotive, and engineering applications.

The Differences Between Grade 5 & Grade 8 Fasteners Explained!

Is Grade C the same as Grade 8?

Grade C. Grade C is a thru-hardened medium carbon zinc plated alloy steel. No head markings (manufacturers mark may also be included). Finish is equivalent in strength to Grade 8 but without the yellow color.

What is the difference between Grade A and Grade C nuts?

Grade A nuts are used with low carbon steel heavy hex bolts. Grade 5 are used with medium carbon cap screws and bolts. Grade C nuts are recommended to be used with A325 structural bolts. Grade 2H nuts are recommended for use in high pressure and high temperature service.

Is Grade 8 or 12.9 stronger?

Used in high stress environments, grade 12.9 fasteners are the highest class of metric cap screws. Where Grade 8 fasteners have a 150,000 psi tensile strength, 12.9 fasteners have a 180,000 psi tensile strength, making them more durable than the grade 5.

Is Grade 5 stronger than Grade 8?

Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions.

Does nut grade matter?

For instance, using mismatched grades of nut and bolt can lead to bolts breaking on tightening and gradual thread stripping. To avoid this, make sure that you match your nut grade with that of your bolt grade. In most instances, standard strength grade bolts and nuts are used in applications.

What is a Grade R bolt?

Metric bolts are usually marked with 8. 8 or 10. 9 which is the grade of the bolt. Imperial bolts have the letters that I mentioned in my last post. Grade S and R are a grade 5 in imperial terms which is the imperial equivalent to grade 8.

What is the difference between a nut and a flange nut?

A flange nut provides a built-in washer (flange) that distributes the clamping load over a wider area as compared to a regular hex lock nut. The flange nut design does not require a flat washer and is the better option when there is an oversized or slotted hole.

What is the difference between a flange nut and a flange lock nut?

“Flange nuts” are a type of fastener with a wide bottom circular flange. Their “washer like” base helps in distributing the load pressure of the nut uniformly over a large surface area. The shape of flange locknuts is hexagonal and is used in assembly lines where workers have to speed up the work process.

What type of lock nut should I use?

For heavy-duty and industrial applications, all metal lock nuts such as stainless-steel lock nuts, mild steel, zinc, or brass locking nuts are preferred. However, part-nylon or all-plastic lock nuts are also popular in many applications, provided the torque forces they will need to withstand are not too severe.

Will a Grade 8 bolt break?

Grade 8 bolts are designated as a 150 ksi. This means its tensile strength or the resistance it has before it is subject to breaking under tension is equal to 150,000 lbs. per square inch. In comparison, a Grade 5 bolt is weaker as its tensile is 120 ksi, placing it at 120,000 lbs.

Is 12.9 stronger than 8.8 bolt?

12.9 bolts have a high ultimate tensile strength but a low ductility (they're more brittle). If they're plated they're also much more prone to hydrogen embrittlement. That could be crucial in this instance. They also need to be torqued up to a much higher proof load than 8.8s.

What does Grade 8 bolt look like?

Grade 8 – Grade 8 bolts are made from medium carbon alloy steel. The bolts of this grade feature 6 radial lines. The nominal size of the grade 8 bolts can be from 1/4″ to 1 1/2″. The minimum yield strength of this grade bolt is 130,000 psi.

What does a Grade 5 nut look like?

Grade 5 nuts shall be marked with three circumferential dashes equally spaced 120° apart. Grade 8 nuts shall be marked with six circumferential dashes equally spaced 60° apart.

What is Grade 7 nuts?

A194 grade 7 nuts are commonly used nuts for both high temperature and low temperature applications, and is commonly paired with bolts made to either A193 or A320.

What are Grade 10 nuts?

The ISO 898-2:2013 Grade 10 specification covers carbon steel nuts ranging from M-6 to M-64 diameter. We use high carbon steel material and high alloy steel raw materials to achieve the required properties of grade 10.

What is a Grade 8 nut?

SAE J995 Grade 8 hex nuts are high-strength nuts manufactured from quenched and tempered carbon alloy steel. Grade 8 hex nuts are available in diameters from 1/4" through 1 1/2" inclusive. Dimensional specifications are governed by ASME B18.