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NTA11551-2NDP — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

NTA11551-2NDP: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: IRON ALLOY 660 OVERALL, thickness: 0.012 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN, hole_diameter: 0.170 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN, overall_diameter: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-339-0244, 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
NTA11551-2NDP
NSN: 5310-01-339-0244
FSC: 5310 — Nuts and Washers
CAGE: A0170 — LEONARDO SPA AERONAUTICS DIVISION - POMIGLIANO D'ARCO SITE (ITA)
SPECIFICATIONS
materialIRON ALLOY 660 OVERALL
thickness0.012 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
hole_diameter0.170 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN
overall_diameter0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-339-0244
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NTA11551-2NDP · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
OVERALL DIAMETER: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: IRON ALLOY 660 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
OVERALL DIAMETER0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
PERIPHERAL SHAPE STYLEROUND
MATERIALIRON ALLOY 660 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.170 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN
THICKNESS0.012 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 1
BACW10BP2NDPSame 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 NTA11551-2NDP?
NTA11551-2NDP is a WASHER,FLAT.
What parts can replace NTA11551-2NDP?
There is 1 known substitute for NTA11551-2NDP: BACW10BP2NDP. Substitute compatibility should be verified for your specific system.
What is the NSN for NTA11551-2NDP?
NTA11551-2NDP is cataloged in the U.S. Government catalog under NSN 5310-01-339-0244. 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.