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1T269 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1T269: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, hole_diameter: 3.170 INCHES NOMINAL IN, heat_treatment: HOT ROLLED, hardness_rating: 85.0 ROCKWELL SUPERFICIAL 15-N MINIMUM, outside_diameter: 4.160 INCHES NOMINAL IN, style_designator: KEY. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-950-5503, 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
1T269
NSN: 5310-00-950-5503
FSC: 5310 — Nuts and Washers
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
hole_diameter3.170 INCHES NOMINAL IN
heat_treatmentHOT ROLLED
hardness_rating85.0 ROCKWELL SUPERFICIAL 15-N MINIMUM
outside_diameter4.160 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.120 INCHES NOMINAL IN
internal_key_quantity2
internal_straight_key_width0.240 INCHES NOMINAL IN
distance_from_centerline_to_top_of_internal_key1.412 INCHES NOMINAL IN
NSN5310-00-950-5503
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1T269 · 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: 0.240 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 1.412 INCHES NOMINAL IN
•
HEAT TREATMENT: HOT ROLLED
•
HARDNESS RATING: 85.0 ROCKWELL SUPERFICIAL 15-N MINIMUM
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 4.160 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.120 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1010 OVERALL
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.240 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY1.412 INCHES NOMINAL IN
HEAT TREATMENTHOT ROLLED
HARDNESS RATING85.0 ROCKWELL SUPERFICIAL 15-N MINIMUM
STYLE DESIGNATORKEY
OUTSIDE DIAMETER4.160 INCHES NOMINAL IN
MATERIAL THICKNESS0.120 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 OVERALL
INTERNAL KEY QUANTITY2
HOLE DIAMETER3.170 INCHES NOMINAL 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 2
M2282PSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1T0269Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1T269?
1T269 is a WASHER,KEY.
What parts can replace 1T269?
There are 2 known substitutes for 1T269: M2282P, 1T0269. Substitute compatibility should be verified for your specific system.
What is the NSN for 1T269?
1T269 is cataloged in the U.S. Government catalog under NSN 5310-00-950-5503. 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.