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5181684 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

5181684: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, hole_diameter: 0.3135 INCHES MINIMUM AND 0.3155 INCHES MAXIMUM IN, outside_diameter: 0.860 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.045 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN, external_prebent_key_width: 0.282 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-347-7593, 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
5181684
NSN: 5310-00-347-7593
FSC: 5310 — Nuts and Washers
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
hole_diameter0.3135 INCHES MINIMUM AND 0.3155 INCHES MAXIMUM IN
outside_diameter0.860 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.045 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
external_prebent_key_width0.282 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN
external_prebent_key_length0.032 INCHES NOMINAL IN
overall_distance_including_keys0.990 INCHES NOMINAL IN
material_document_and_classificationQQ-B-750 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_inside_of_prebent_key0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
NSN5310-00-347-7593
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5181684 · 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
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
•
EXTERNAL PREBENT KEY LENGTH: 0.032 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 0.990 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-B-750 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.860 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.045 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
•
EXTERNAL PREBENT KEY WIDTH: 0.282 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY LENGTH0.032 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS0.990 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-750 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.860 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN
MATERIAL THICKNESS0.045 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN
EXTERNAL PREBENT KEY WIDTH0.282 INCHES MINIMUM AND 0.287 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY OVERALL
HOLE DIAMETER0.3135 INCHES MINIMUM AND 0.3155 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5181684?
5181684 is a WASHER,KEY.
What is the NSN for 5181684?
5181684 is cataloged in the U.S. Government catalog under NSN 5310-00-347-7593. 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.