Howmet Aerospace - 40S79 Steel Stud Assemblies w/ Slotted Head

This series utilizes a variety of grommets which must be installed into the top panel. They significantly enhance the system’s performance.
Contact us for strengths for stainless steel stud assemblies and for other styles, materials, or finishes.

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Unit of Measure

Items	40S79-1 40S79 Steel Stud Assemblies w/ Slotted Head	40S79-2 40S79 Steel Stud Assemblies w/ Slotted Head	40S79-3 40S79 Steel Stud Assemblies w/ Slotted Head	40S79-4 40S79 Steel Stud Assemblies w/ Slotted Head	40S79-5 40S79 Steel Stud Assemblies w/ Slotted Head
Stud Material	N/A 4037 Alloy Steel per ASTM A752
Cup Material	N/A 1050 Carbon Steel per ASTM A684
Spring & Cross Pin Material	N/A Music Wire per ASTM A228, Cadmium Plate per AMS-QQ-P-416, Class 2 Type II
Head Style	N/A Slotted
Finish	N/A Nickel Plate per AMS-QQ-N-290, Type IV, Class 1 (Semi-Bright Finish)
L	N/A 0.383-0.393 in	N/A 0.413-0.423 in	N/A 0.443-0.453 in	N/A 0.473-0.483 in	N/A 0.503-0.513 in
S	N/A 0.660 in	N/A 0.690 in	N/A 0.720 in	N/A 0.750 in	N/A 0.780 in
Stud Heat Treatment	N/A Hardened
Ultimate Tensile Strength	N/A 1050.000 lb
Working Strength	N/A 700.000 lb
Stud Grip Increments	N/A 0.030 in
Minimum Preload	N/A 50.000 lb
Maximum Service Temperature	N/A 450.000 ºF
Weight/100	N/A 0.869 lb	N/A 0.887 lb	N/A 0.969 lb	N/A 0.988 lb	N/A 1.050 lb