5/16"-18 Grade 5 Nylon Insert Hex Flange Lock Nuts Zinc

Product Description

Part Number: 31CNFNFZ
Diameter/Pitch: 5/16"-18
Grade: Grade 5
Finish: Zinc Clear
Thread Series: Coarse (UNC)
Wrench Size: 1/2"

BoltsandNuts.com

5/16"-18 Grade 5 Nylon Insert Hex Flange Lock Nuts Zinc

SKU: 31CNFNFZ

Product Description

Part Number: 31CNFNFZ
Diameter/Pitch: 5/16"-18
Grade: Grade 5
Finish: Zinc Clear
Thread Series: Coarse (UNC)
Wrench Size: 1/2"

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$0.58/pc

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Thread Size	5/16"-18
Finish	Zinc Clear
Thread Series	Coarse (UNC)
Proof Load (min)	6,290 lbf
Max Temperature	250°F (nylon insert limit)

Grade	Grade 5
Head Type	Hex Flange
Head Marking	J995 Grade 5 marking
Hardness	Rockwell C25–C34

Material	Medium carbon steel, quenched and tempered
Wrench Size	1/2"
Thread Class	2B
Locking Type	Nylon Insert (Prevailing Torque)

Technical Drawing

Not to scale · IFI-100/107 · See table for exact dimensions

Technical Dimensions

Wrench Size	1/2"
Thread Size	5/16"-18
Threads Per Inch	18 TPI
Thread Class	2B
Flange Style	Nylon Insert Flange Nuts
Head Type	Hex Flange
Material	Medium carbon steel, quenched and tempered

Hex flange nut with a nylon insert ring at the top that grips the bolt thread to resist vibration loosening, and an integral flange that spreads load like a built-in washer. Not for use above the insert temperature limit.

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