Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW
The FSC/MD-25 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-185-8497, indicating validated use in U.S.
government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.
WHERE IT FITS
FSC/MD-25
NSN:5310-01-185-8497 FSC:5310 CAGE:04967 — FASTENER SPECIALTY, INC. (USA)
SPECIFICATIONS
Part Number
FSC/MD-25
NSN
5310-01-185-8497
COMPONENT DIAGRAM
KEY FEATURES
•
LUBRICATION: DRY FILM LUBRICANT
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-N-45938 MIL SPEC 2ND MATERIAL RESPONSE NUT
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE OVERALL EXCEPT INSERT
ONE CENTRALLY LOCATED RD HOLE 1.658 IN. MIN DIA AND 1.673 IN. MAX DIA; FOUR CLINCH NUTS MOUNTED ON 1.497 IN. MIN X 1.503 IN. MAX MOUNTING CENTERS; NUTS EXTEND FOR A TOTAL THK OF 0.123 IN. MIN,0.183 IN. MAX; FOUR CORNERS 0.090 IN. NOM RADIUS; CLINCH NUTS ARE SELFLOCKING TYPE IN
MATERIAL DOCUMENT AND CLASSIFICATION
MIL-N-45938 MIL SPEC 2ND MATERIAL RESPONSE NUT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE OVERALL EXCEPT INSERT
SURFACE TREATMENT
CADMIUM NUT
MATERIAL
ALUMINUM ALLOY 6061 OVERALL EXCEPT INSERT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION
MIL-N-45938 MIL SPEC 2ND TREATMENT RESPONSE NUT
MATERIAL
STEEL NUT
MATERIAL DOCUMENT AND CLASSIFICATION
QQ-A-250/11 FED SPEC 1ST MATERIAL RESPONSE OVERALL EXCEPT INSERT
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FREQUENTLY ASKED QUESTIONS
What is FSC/MD-25?
FSC/MD-25 is a FSC/MD-25.
What parts can replace FSC/MD-25?
There are 11 known substitutes for FSC/MD-25: 100925, 7124, A43 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FSC/MD-25?
FSC/MD-25 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-185-8497. This indicates validated use in U.S. government and defense supply chains.
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