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Technical Data Sheet
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11A9C138-266 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

11A9C138-266: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5315-01-133-0858, 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
11A9C138-266
NSN: 5315-01-133-0858
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 30760 — INGERSOLL RAND CO (USA)
SPECIFICATIONS
Part Number11A9C138-266
NSN5315-01-133-0858
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 11A9C138-266 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 2
55-22016 PART 9Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
11A9C137-266Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 11A9C138-266?
11A9C138-266 is a KEY,MACHINE.
What parts can replace 11A9C138-266?
There are 2 known substitutes for 11A9C138-266: 55-22016 PART 9, 11A9C137-266. Substitute compatibility should be verified for your specific system.
What is the NSN for 11A9C138-266?
11A9C138-266 is cataloged in the U.S. Government catalog under NSN 5315-01-133-0858. This indicates validated use in U.S. government and defense supply chains.
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