40S5-4, 1/4 Turnlock Fastener Stud Assembly, 10 PieceCondition:* New Surplus Stock, No OEM Packaging. As Pictured.Additional Notes:* Diameter: Between 0.377″ and 0.384″* Distance From Engaging Member To Largest Bearing Surface Of Head: Between 0.433″ and 0.443″* Drive Type: Cross Recess* Eyelet Length: 0.257″* Eyelet Outside Diameter: Between 0.341″ and 0.348″* Material: Steel Comp 1009 eyelet or steel comp 1050 eyelet or steel comp 1112 eyelet* Material: Steel Comp 4037 Stud* Material: Steel Pin* Material: Steel Ejector Spring* Material Accommodated Thickness: Between 0.141″ and 0.170″* Material Specification: Qq-w-470 federal specification single material response ejector spring* Material Specification: Qq-w-470 federal specification single material response pin* Stud Assembly Style: Stud Assembly* Stud Head Height: 0.102″* Surface Treatment: Cadmium and Chromate* Surface Treatment Specification: Cl 2 federal specification single treatment response type 2 qq-p-416* Turnlock Stud Head Style: Stud HeadUNK40S5-4