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Product Description

Part Number: 25FNNE8Y
Diameter/Pitch: 1/4"-28
Grade: Grade 8
Finish: Zinc Yellow
Thread Series: Fine (UNF)
Wrench Size: 7/16"

BoltsandNuts.com

1/4"-28 Grade 8 Hex Nylon Insert Lock Nuts Zinc Yellow

SKU: 25FNNE8Y
Product Description

Part Number: 25FNNE8Y
Diameter/Pitch: 1/4"-28
Grade: Grade 8
Finish: Zinc Yellow
Thread Series: Fine (UNF)
Wrench Size: 7/16"

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Thread Size1/4"-28
FinishZinc Yellow
Thread SeriesFine (UNF)
Proof Load (min)5,460 lbf
Locking TypeNylon Insert (Prevailing Torque)
GradeGrade 8
Head TypeHex
Head MarkingJ995 Grade 8 marking
Specifications MetIFI-100/107
Max Temperature250°F (nylon insert limit)
MaterialMedium carbon alloy steel, quenched and tempered
Wrench Size7/16"
Thread Class2B
Lock TypeNylon Insert Lock Nuts
Technical Drawing
TOP VIEWnylon insertFRONT VIEW
Not to scale · IFI-100/107 · See table for exact dimensions

Technical Dimensions

Width Across Flats 0.438" (7/16")
Thread Size 1/4"-28
Width Across Corners 0.505" max
Thread Class 2B
Locking Type Nylon Insert (Prevailing Torque)
Max Temperature 250°F (nylon insert limit)
Material Medium carbon alloy steel, quenched and tempered
Hex nut with a nylon insert ring at the top. The insert grips the bolt threads to resist loosening from vibration; it is a prevailing-torque nut, so expect drag while it runs down. Not for use above the insert temperature limit.

Dimensions conform to IFI-100/107 and may vary within specified manufacturing tolerances.

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