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Plain Finish 9/16" 3/8" Hexagon Top Lock Nut ASTM Gr2 Prevailing Torque Type

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Plain Finish 9/16" 3/8" Hexagon Top Lock Nut ASTM Gr2 Prevailing Torque Type

Brand Name : HNF
Model Number : 9/16"-18 3/8"-24
Certification : ISO9001:2008
Place of Origin : Jiaxing, CN
MOQ : 500 kg
Price : $0.0002 piece
Payment Terms : L/C, T/T, Western Union, Paypal
Supply Ability : 600 tons per month
Delivery Time : 5-25 days
Packaging Details : Common export packing. Cartons+Pallets, or customized packing. Bag Packing
Product : Hexagon Top Lock Nut
Head Drive : Hex Nut
Standard : Nonstandard. Customize
Surface : Plain Finish
Grade : Gr4 Gr8 Gr2 G5
Head : Hex Head
Torque : As standard
Material : Carbon Steel. MS
Inspection : 100%QC Steps Inspect Before Shipment
Service : OEM
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Plain Finish 9/16" 3/8" Hexagon Top Lock Nut ASTM Gr2 Prevailing Torque Type


Prevailing torque nuts, are also called hex top lock nuts, offer various kinds of locking features to meet customer's performance requirements. Consistent torque at tension allows for reliable joint integrity.

The top lock nuts are manufactured from low-carbon steel to meet Grade A performance specifications. These kinds of prevailing torque lock nuts are designed for use in non-critical applications with Grade 2 or Grade 5 hex bolts, or other customized bolts.

The lock nuts can be supplied with a mutitude of finishes or customer-specific coatings.

There are many kinds of lock nut. Prevailing Torque Type Hexagon Top Lock Nut.
The first is on the outer surface of the nut to the inner circumferential surface of the threaded screw holes drilled therethrough (typically two, distributed in the outer-section 90) for screwing the small-diameter countersunk screws, the purpose is to thread applying a radial direction of force to prevent the lock nut loosened. At present quality on the market in a better lock nut inner peripheral surface of the nut encrusted consistent with the lock nut threaded brass pieces, to avoid radial top screws directly contacts the locking threads and damaged By. This rotational movement of the locking nut locking shaft-type parts of the case gradually began to use, such as a ball screw mounting end bearing locking.

The second lock nut is composed of two parts, each part has staggered cam, wedge design due to internal slope angle oblique angle is larger than the nut bolts, this combination will firmly bite into one whole, when vibration occurs when, DISC-lOCK locknut raised portions mutually dislocation, resulting in uplift tension to achieve the perfect anti-loosening effect.

Lock nut is widely used in machinery and other industries.


NameASTM Gr2 Prevailing Torque Type Plain Finish 9/16" 3/8" Hexagon Top Lock Nut
Size9/16"-18 3/8"-24 or non-standard as request&design
Finishplain, Black, Zinc Plated
Head TypeHex
MaterialCarbon steel, MS, Mild Steel, 1008
PackageBulk in master cartons, then on pallets, or according to customers' requirement.
PaymentT/T, L/C

Prevailing Torque of the hex top lock nut:

Prevailing Torque --

First Install Max.

First Removal Min.

Third Removal Min.









Technical Delivery Conditions (FOR DIN NUT ONLY)
MaterialSteelStainless steelNon-ferrous metal
General requirementsAs specified in DIN 267 part 1
StandardDIN13 Part 12 & 15
<M2.5: 6
M3-M39:6, 8, 10
≤M39A2-70Subject to
>M39Subject to
StandardISO 267 Part 4DIN267 Part 11DIN267 Part 18
Limit deviations
geometrical tolerance
A for product up to size M24 and L≤10d or 150mm
B for product exceeding size M24 or L>10d or 150mm
StandardISO 4759 Part 1


The Prevailing Torque Type Hexagon Top Lock Nut is mainly used for fastener one thing. And it has requirement of the torque, and we will control the torque for customers.


1. Rich experience
2. Well equiped with complete facilities
3. High quality
4. Strict quality control system
5. Best services
6. Customer's design

7. Good package

Product Tags:

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Plain Finish 9/16" 3/8" Hexagon Top Lock Nut ASTM Gr2 Prevailing Torque Type Images

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