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2181547 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2181547: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 625 OVERALL, hole_diameter: 0.525 INCHES MINIMUM AND 0.535 INCHES MAXIMUM IN, outside_diameter: 0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN, split_key_length: 0.210 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.0380 INCHES MINIMUM AND 0.0405 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-133-5840, 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
2181547
NSN: 5310-01-133-5840
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialNICKEL ALLOY 625 OVERALL
hole_diameter0.525 INCHES MINIMUM AND 0.535 INCHES MAXIMUM IN
outside_diameter0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN
split_key_length0.210 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.0380 INCHES MINIMUM AND 0.0405 INCHES MAXIMUM IN
external_key_quantity3
external_prebent_key_angle10.0 DEGREES MINIMUM AND 20.0 DEGREES MAXIMUM
external_prebent_key_width0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
external_tapered_key_width0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
angle_between_external_keys58.0 DEGREES MINIMUM AND 62.0 DEGREES MAXIMUM
external_prebent_key_length0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
NSN5310-01-133-5840
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2181547 · 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
•
SPLIT KEY LENGTH: 0.210 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
•
EXTERNAL PREBENT KEY LENGTH: 0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5599 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN
•
EXTERNAL TAPERED KEY WIDTH: 0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.0380 INCHES MINIMUM AND 0.0405 INCHES MAXIMUM IN
•
EXTERNAL KEY QUANTITY: 3
TECHNICAL CHARACTERISTICS
SPLIT KEY LENGTH0.210 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY LENGTH0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5599 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN
EXTERNAL TAPERED KEY WIDTH0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
MATERIAL THICKNESS0.0380 INCHES MINIMUM AND 0.0405 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY3
EXTERNAL PREBENT KEY ANGLE10.0 DEGREES MINIMUM AND 20.0 DEGREES MAXIMUM
EXTERNAL PREBENT KEY WIDTH0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 2181547?
2181547 is a WASHER,KEY.
What is the NSN for 2181547?
2181547 is cataloged in the U.S. Government catalog under NSN 5310-01-133-5840. 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.