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Jack Screw Assembly Kit, Hex, Black Oxide, Steel, #4-40, 3/16" Body Length

Part ID: ST9421-50

Technical Specifications

Material
Grade (Alloy):
Steel
12L14 (QQ-S-637, ASTM-A-108)
1215 (QQ-S-637, ASTM-A-108)
Profile Hex
Outside Diameter 3/16"
Body Length 3/16"
Male Thread #4-40
Thread Length 1/4"
Female Thread #4-40
Kit includes subcomponents ST9411-50 - quantity per kit: 2
ST300-50 - quantity per kit: 4
ST302-50 - quantity per kit: 2
ST400-50 - quantity per kit: 2
Finish Desc. (Spec) Black Oxide
(MIL-C-13924)
Compliant To WEEE, REACH, DFARS, Conflict Minerals

Available Finishes

Code Description Specification Quantity Available
00 Unplated Plain 0
31 Clear Cadmium SAE-AMS QQ-P-416 0
32 Yellow Cadmium SAE-AMS QQ-P-416 1,634
33 Black Zinc ASTM B633 0
34 Zinc Clear Chromate with Blue Tint ASTM-B633 4,003
36 Zinc Yellow Chromate ASTM-B633 0
43 Electro Tin - Bright ASTM B 545 0
48 Copper-Nickel-Bright Tin ASTM B545 0
50 Black Oxide MIL-C-13924 0
52 Black Oxide MIL-C-13924 0
61 Nickel AMS-QQ-N-290 0
63 Ductile Nickel SAE-AMS-QQ-N-290 0
66 Electroless Nickel SAE AMS-C-26074 0

Product Description

A Jack Screw is simply a 3/16” Hex, 4-40 Male-Female Standoff, that is 3/16” in length. What separates these is that you can choose the male-thread length that will best fit your application. These are also called Female Screw-Locks and are most commonly used in mounting D-Sub Connectors. As each D-Sub connector requires 2 screws, each Jack Screw Assembly Kit is individually packaged with 2 Screws, 4 Flat Washers, 2 Lock Washers and 2 Nuts. Other packaging options include the screw only or having each component packaged individually in Bulk. The hex shape allows for greater torquing as the flat sides allow for wrench tightening. Steel is inexpensive, easy to achieve finer surface quality requirements and provides relatively high strength properties. Multiple plating options are available to increase the material's corrosion resistance and alter its appearance.

Stock and Lead Time

Stock 0 Available
Stock to Plate 0 2 to 3 weeks
Manufacture Lead Time 12-13 Weeks

Pricing as Black Oxide

Pricing information not available. But you can always request a quote and we'll get back to you.

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