MS27039F
NOTES:
1. All dimensions are in inches.
2. Screws shall be free from burrs and sharp edges.
3. Dimensions are to be met after plating.
4. Shank diameter may be .001 oversize for a maximum distance of .031 adjacent to the head.
5. In the event a conflict between the text of this document and the references cited herein, the text of this document will take precedence.
6. Unless otherwise specified, issues of referenced documents are those in effect at the time of solicitation.
7. Caution should be taken during plating process. The contractor shall be responsible for the safe reutilization and disposal of all materials generated by this process in accordance with ASTM A380, section 8.2 and 8.7.
8. Items manufactured to Rev. C and Rev. D may be delivered from suppliers stock until depletion.
REQUIREMENTS:
1. Material:
Aluminum Alloy 2024 (UNS A92024) in accordance with QQ-A-430, Temper 2024-D, or
QQ-A-225/6, Temper T4.
Manganese Bronze (UNS C67000) in accordance with ASTM B138.
Alloy Steel 8630 (UNS 086300) in accordance with MIL-S-7839, 26-32 HRC or 8740 (UNS 087400), 4130 (UNS 041300) in accordance with MIL-S-6049.
Heat and Corrosion-Resistant Steel, A286 Iron Base Super Alloy (UNS S66286) in accordance with AMS 5731 or AMS 5732.
2. Protective coating and surface treatment:
Aluminum Alloy: Anodize, in accordance with MIL-A-8625, Type I or II.
Manganese Bronze: Cadmium Plate, in accordance with QQ-P-416, Type II, Class 3. Manganese Bronze: uncoated.
Alloy Steel: Cadmium Plate, in accordance with QQ-P-416, Type II, Class 2.
Heat and Corrosion-Resistant Steel: Passivate in accordance with QQ-P-35 after removal of all oil and grease. Passivation verification test per Method 102 of MIL-STD-753.
3. Tensile strength:
Aluminum Alloy: 62,000 psi min ultimate tensile strength. Manganese Bronze: 85,000 psi min ultimate tensile strength. Alloy Steel: 125,000 to 145,000 psi ultimate tensile strength.
Heat and Corrosion-Resistant Steel: 130,000 psi min ultimate tensile strength.
4. Threads:
Threads shall be accordance with FED-STD-H28/2. Acceptability of screw threads shall be in accordance with FED-STD-H28/20, system 21.
5. Recess:
The recess shall be in accordance with MS9006.
6. Material and finish code:
Add DD before dash number for Anodized Aluminum Alloy Screw. Add BP before dash number for Cadmium Plated Manganese Screw. Add B before dash number for uncoated Manganese Bronze Screw. Add - before dash number for Cadmium Plated Alloy Steel Screw.
Add C before dash number for Heat and Corrosion-Resistant Steel Screw.
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