D Min. L TD TL* Max. FD Max. FH Ferrule Code
1/4 9/16 8-32 1/4 0.359 0.109 F250
5/16 21/32 10-24 9/32 0.437 0.109 F312
3/8 13/16 1/4-20 3/8 0.500 0.125 F375
7/16 29/32 5/16-18 15/32 0.578 0.140 F437
1/2 1-1/32 3/8-16 9/16 0.625 0.156 F500
5/8 1-9/32 3/8-16 9/16 0.625 0.156 F500
3/4 1-3/8 1/2-13 3/4 0.937 0.250 F750
7/8 1-5/8 5/8-11 15/16 1.093 0.312 F875
* Maximum standard tap depth equals 1-1/2 times tap diameter.

Materials
Low Carbon Steel
C - 0.23% max. P - 0.04% max.
Mn - 0.90% max. S - 0.05% max.

Stainless Steel
AISI grade - 302/304/305 std.
Other grades available upon request.

Mechanical Properties
Low Carbon Steel
Tensile - 60,000 psi (min.)
Yield - 50,000 psi (min.)
Elongation - 20% (in 2 inches)

Stainless Steel
Values for various grades available upon request.

Plating
Low Carbon Steel
Plating is not standard.
Copper, nickel, and zinc available upon customer request.

Stainless Steel
Does not apply to Stainless.

Ferrules
Ferrules are component parts of studs. Not sold separately.

Taps
Standard tap is UNC-2B, other taps are available.

Compliances & Standards
MIL-S-24149 (Military Specification: Studs, Welding and Arc Shields (Ferrules)

Please click the Request Information button to configure your Tapped Full Base Arc Weld Studs.
Unit of Measure

Ferrules

Ferrules

N/A
Code B D E M Part No.
F250 0.380 0.455 0.156 0.390 092 0005 06
F312 0.445 0.578 0.156 0.390 092 0005 07
F375 0.505 0.640 0.156 0.390 092 0005 08
F437 0.585 0.703 0.188 0.422 092 0005 09
F500 0.650 0.795 0.188 0.438 092 0005 10
F625 0.785 1.030 0.188 0.516 092 0005 11
F750 1.030 1.218 0.188 0.656 092 0005 12
F875 1.203 1.406 0.188 0.732 092 0005 13

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