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Ejecting Blades

Ejecting blades provide a simple and reliable means of stud ejection. The ejected stud is retained in proper alignment for locking, yet completely clears both support and panel holes.

For Size 3 Studs:

There are two styles of Ejecting Blades for the Size 3 Studs. The 1224-159, 1224-159-1 and 1224-1031-1 Ejecting Blades require a retainer to hold the stud. The 1224-721 Ejecting Blade has a split in the end with the hole smaller than the stud end. This allows the Ejecting Blade to clip over the undercut of the stud and to act as the stud retainer.

The 1224-159, 1224-159-1, 1224-1031, 1224-1031-1, and 1224-721 Ejecting Blades add .015 in. (0.38 mm) to the total pileup calculation.

1224-159-1 Ejecting Blade

Part Number A Material Finish
in. mm.
1224-159 .096 2.44 A. I. S. I. C1095 Steel,
Spring Temper		 Black Bear (rust inhibitor) (NOT RoHS Compliant)
Specification(s): ---
Suffix: -BB
1224-159-1 .100 2.54
1224-159-SS .096 2.44 Type 302
Stainless Steel
Spring Temper		 Natural
1224-159-1-SS .100 2.54

Upon depletion of the existing stock of the 1224-159 and 1224-159-SS Ejecting Blade, they will be discontinued. At that time, please use the 1224-159-1 and 1224-159-1-SS Ejecting Blade.

1224-1031 Ejecting Blades

Click here for the Engineering Drawing

Part Number A Material Finish
(in) (mm)
1224-1031-SS .096 2.44 Type 302
Stainless Steel,
Spring Temper		 Natural
1224-1031-1-SS .100 2.54

1224-721 Ejecting Blade

Click here for the Engineering Drawing

Part Number Material Finish
1224-721-Z3CT Phosphor Bronze,
Spring Temper		 Zinc Trivalent Clear .0003 thick. Trivalent Chromate Clear with Sealer (RoHS Compliant)
Specification(s): ASTM-B-633, Type III, SC 2, Clear
Suffix: -Z3CT
1224-721-SS Type 302,
Stainless Steel,
Spring Temper		 Natural

For Size 4, 5, 6, and 65 Studs:

The 1224-200-x Ejecting Blade adds .020 in. (0.51 mm) to the total pileup calculation.

Stud Size Part Number A H R Material Finish
in. mm. in. mm. in. mm.
5 1224-200-1 .625 15.88 .377 9.58 .312 7.92 A. I. S. I. C1095
Spring Temper		 Black Bear (rust inhibitor) (NOT RoHS Compliant)
Specification(s): ---
Suffix: -BB
65 1224-200-2 .750 19.05 .505 12.83 .375 9.53
4 1224-200-3 .500 12.70 .315 8.00 .250 6.35
6 1224-200-4 .750 19.05 .442 11.23 .375 9.53
5 1224-200-1-SS .625 15.88 .377 9.58 .312 7.92 Type 302,
Stainless Steel,
Spring Temper		 Natural
65 1224-200-2-SS .750 19.05 .505 12.83 .375 9.53
4 1224-200-3-SS .500 12.70 .315 8.00 .250 6.35
6 1224-200-4-SS .750 19.05 .442 11.23 .375 9.53

Note: When our existing supply of Cadmium plated parts is exhausted, DFCI Solutions, Inc will no longer offer Cadmium plating as an option.

In place of the Cadmium plating, we recommend:

Clear: Zinc Trivalent Clear .0003 thick. Trivalent Chromate Clear with Sealer (RoHS Compliant)
Specification(s): ASTM-B-633, Type III, SC 2, Clear
Suffix: -Z3CT

Black: Zinc Trivalent Black .0003 thick. Trivalent Chromate Black Dye with Sealer (RoHS Compliant)
Specification(s): ASTM-B-633, Type II, SC 2, Black
Suffix: -Z3BT

Yellow: Zinc Trivalent Yellow .0003 thick, Trivalent Chromate Yellow Dye with Sealer

We recommend the Z3CT finish instead of the Z3YT finish. The Z3CT finish is much more cost effective and provides the same salt spray benefits as the Z3YT finish. (RoHS Compliant)
Specification(s): ASTM-B-633, Type II, SC 2, Yellow
Suffix: -Z3YT

The colored finishes offer no advantage over the clear other than the color, and they are more expensive.