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87-740050 — KEY,POLARIZING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

87-740050: KEY,POLARIZING.

The KEY,POLARIZING is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: 0.330 IN. LG,0.250 IN.

HIGH,0.027 IN. THK IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-042-2998, 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
87-740050
NSN: 5315-01-042-2998
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 55588 — EATON ELECTRICAL INC. DBA CUTTLER HMMER CMRCL CNTRLS DIV DIV VEHICLE CONTROLS BUSINESS UNIT (USA)
SPECIFICATIONS
general_characteristics_item_description0.330 IN. LG,0.250 IN. HIGH,0.027 IN. THK IN
NSN5315-01-042-2998
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 87-740050 · 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
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: 0.330 IN. LG,0.250 IN. HIGH,0.027 IN. THK IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTION0.330 IN. LG,0.250 IN. HIGH,0.027 IN. THK IN
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 1
8740050Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 87-740050?
87-740050 is a KEY,POLARIZING.
What parts can replace 87-740050?
There is 1 known substitute for 87-740050: 8740050. Substitute compatibility should be verified for your specific system.
What is the NSN for 87-740050?
87-740050 is cataloged in the U.S. Government catalog under NSN 5315-01-042-2998. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.