PartsTable
Technical Data Sheet
Download PDF

2W11A9 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2W11A9: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.578 INCHES MINIMUM AND 0.588 INCHES MAXIMUM IN, outside_diameter: 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN, surface_treatment: CADMIUM OVERALL, material_thickness: 0.032 INCHES NOMINAL IN, external_straight_key_width: 0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-286-9667, 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
2W11A9
NSN: 5310-00-286-9667
FSC: 5310 — Nuts and Washers
CAGE: 43999 — THE BOEING COMPANY DIV LEGACY AM&M (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.578 INCHES MINIMUM AND 0.588 INCHES MAXIMUM IN
outside_diameter0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
material_thickness0.032 INCHES NOMINAL IN
external_key_quantity4
internal_key_quantity1
external_straight_key_width0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
internal_straight_key_width0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
external_straight_key_length0.437 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
overall_distance_including_keys1.312 INCHES NOMINAL IN
material_document_and_classificationQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-286-9667
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2W11A9 · 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
•
INTERNAL STRAIGHT KEY WIDTH: 0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY LENGTH: 0.437 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.219 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DISTANCE INCLUDING KEYS: 1.312 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.032 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY LENGTH0.437 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.219 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DISTANCE INCLUDING KEYS1.312 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
MATERIAL THICKNESS0.032 INCHES NOMINAL IN
EXTERNAL STRAIGHT KEY WIDTH0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY4
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: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
Ready to buy 2W11A9?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 2W11A9?
2W11A9 is a WASHER,KEY.
What is the NSN for 2W11A9?
2W11A9 is cataloged in the U.S. Government catalog under NSN 5310-00-286-9667. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 2W11A9

✓ 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.