Specification Brand : 80/20 BulletPoint1 : Measures 18 mm x 6.8 mm x 23 mm long with a M8 thread BulletPoint2 : 15 and 40 Series compatible BulletPoint3 : Made out of 1045 steel with a bright zinc finish ItemName : 13066, 15 40 Series M8 Slide in T-Nut Steel Ball Spring (100 Pack) ItemPackageDimensions_Height : 7 inches ItemPackageDimensions_Length : 6 inches ItemPackageDimensions_Width : 5 inches ItemPackageQuantity : 100 ItemTypeKeyword : strut-channel-nuts Manufacturer : 80/20 Inc. Material : Steel PackageLevel : unit ProductDescription : The slide-in T-nut with ball spring is a fastening option that loads from the profile ends. The ball spring holds the T-nut in the T-slot, even when the profile is in a vertical position. ProductSiteLaunchDate : 2022-05-06T18:33:49.696Z UnspscCode : 31161700