Specification Brand : All American BulletPoint1 : I.D. Tolerance of +.0001/.0005 BulletPoint2 : Concentricity of 0 to .0003 Total indicator reading maximum BulletPoint3 : Heat treated to Rockwell C62 to 64. BulletPoint4 : Non Counterbored ExternallyAssignedProductIdentifier1 : 822353032138 ExternallyAssignedProductIdentifier2 : 0822353032138 ExternallyAssignedProductIdentifier3 : 00822353032138 ItemName : All American Type P bushing, 1/4 ID x 1/2 OD x1/4" L, C1144 Steel, Heat Treated to Rockwell C62 to 64 Made in USA ItemPackageDimensions_Height : 7.62 centimeters ItemPackageDimensions_Length : 11.43 centimeters ItemPackageDimensions_Width : 7.62 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : drill-adapters Manufacturer : All American Products Material : Steel ModelNumber : NH-AL3 NumberOfItems : 1 PartNumber : P-32-4- 1/4 ProductDescription : All American Drill Bushing are made in the USA from steel obtained from a domestic steel foundry. Our standard bushings are made of C1144 and heat treated to Rockwell C62-64. Concentricity is held at 0 to .0003 T.I.R maximum for ID sizes of 1/8 to ½ and 0 to .0005 T.I.R Max for any other size. A blended Radius on the drill entrance improves drill entry and alignment which prevents tool wear and breakage. All of our products are free of conflict materials of any kind and conform to Reach. ProductSiteLaunchDate : 2014-11-20T22:11:05.884Z UnitCount : 1