Specification Brand : Carr Lane Manufacturing BulletPoint1 : A: M8 BulletPoint2 : Initial End Force: 1.5 BulletPoint3 : Final End Force: 6 BulletPoint4 : C: 3/16 BulletPoint5 : D: 5/8 ItemName : CLM-8-HRP-S Carr Lane Manufacturing Hand-Retractable Plunger, Knurled Head, Standard Plunger, Stainless Steel: Thread M8 ItemPackageQuantity : 1 ItemTypeKeyword : ball-nose-spring-plunger Manufacturer : Carr Lane Manufacturing Material : stainless_steel MeasurementSystem : inch PartNumber : CLM-8-HRP-S ProductDescription : Spring-loaded plunger that locks in retracted position. To lock, pull knurled knob back and turn 90?. Standard plunger has a slight taper on plunger tip for easy alignment. Also available with a radiused Delrin plunger (slightly larger plunger diameter and lighter spring force). Available in steel or stainless steel. Made in USA. ProductSiteLaunchDate : 2013-12-20T18:16:43.556Z SupplierDeclaredDgHzRegulation : unknown