Specification Brand : Allied Titanium BulletPoint : A set of 4 low profile, ultra-light aluminum flange lock nuts. These flanged lock nuts are very low profile making them perfect for mini motors that don't have a tall prop adapter. This ensures the nylon inside the nut can actually engage even on short adapters. Use these to customize your air-frame and secure your props.Picture 2 shows the difference between the low profile nut and a regular lock nut.IncludesSet of 4 shallow black anodized aluminum flange lock nuts (CW thread)5mm coarse 0.8 thr BulletPoint1 : 5/16-24 UNF Allied Titanium Hex Lock Nut, Low Profile BulletPoint2 : TRUE TITANIUM(TM) - Stronger, Lighter and Corrosion Free BulletPoint3 : Titanium is good for use in or near saltwater BulletPoint4 : General Tolerance: +0/-0.003 inch BulletPoint5 : Grade 5 (Ti-6Al-4V) Titanium with Polished Finish Color : red DriveSystem : External Hex ExteriorFinish : Polished ExternallyAssignedProductIdentifier1 : 051907318354 ExternallyAssignedProductIdentifier2 : 0051907318354 ExternallyAssignedProductIdentifier3 : 00781002123019 FinishType : Polished,Titanium GradeRating : Grade 5 ItemDisplayWeight : 0.09 ounces ItemName : Allied Titanium 0021813, (Pack of 10) 5/16-24 UNF Titanium Hex Lock Nut, Low Profile, Grade 5 (Ti-6Al-4V) ItemPackageDimensions_Height : 10.414 centimeters ItemPackageDimensions_Length : 0.254 centimeters ItemPackageDimensions_Width : 10.16 centimeters ItemPackageQuantity : 10 ItemShape : Hexagonal ItemTypeKeyword : hardware-locknuts Manufacturer : Allied Titanium, Inc. Material : Titanium MeasurementSystem : Inch MetalType : Titanium ModelNumber : 609153001 NumberOfItems : 10 NumberOfPieces : 1 PartNumber : 0021813 Pattern : Nylon Insert ProductDescription : These Nylon Insert Hex Locknuts are Grade 5 (Ti-6Al-4V) titanium and are TRUE TITANIUM(TM). They are stronger, lighter and completely corrosion free, even in saltwater. The nylon insert in the hex nut allows for the threads on a bolt or screw to embed the ProductSiteLaunchDate : 2018-10-19T21:48:19.723Z SafetyDataSheetUrl : https://www.alliedtitanium.com/forms/Allied_Ti-6Al-4V)_MSDS.pdf Size : 5/16-24 UNF Class 2B Threads Style : Nyloc (Nylon Insert Locknut) NTE Thin SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable UnitCount : 1 UnspscCode : 31161700