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2W11A12 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2W11A12: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.766 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN, outside_diameter: 1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN, surface_treatment: CADMIUM OVERALL, external_straight_key_width: 0.250 INCHES NOMINAL IN, internal_straight_key_width: 0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-209-2583, 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
2W11A12
NSN: 5310-00-209-2583
FSC: 5310 — Nuts and Washers
CAGE: 43999 — THE BOEING COMPANY DIV LEGACY AM&M (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.766 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
outside_diameter1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
external_key_quantity4
internal_key_quantity1
external_straight_key_width0.250 INCHES NOMINAL IN
internal_straight_key_width0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
external_straight_key_length0.282 INCHES NOMINAL IN
overall_distance_including_keys1.688 INCHES NOMINAL IN
material_document_and_classificationQQ-S-636 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_top_of_internal_key0.312 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
NSN5310-00-209-2583
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2W11A12 · 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: 0.282 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.312 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 1.688 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-636 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.250 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 4
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY LENGTH0.282 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.312 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS1.688 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-636 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.115 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY WIDTH0.250 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY4
SURFACE TREATMENTCADMIUM OVERALL
MATERIALSTEEL OVERALL
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
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FREQUENTLY ASKED QUESTIONS
What is 2W11A12?
2W11A12 is a WASHER,KEY.
What is the NSN for 2W11A12?
2W11A12 is cataloged in the U.S. Government catalog under NSN 5310-00-209-2583. 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.