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7-211511177-3 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

7-211511177-3: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, thickness: 0.155 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN, hole_diameter: 1.380 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN, overall_diameter: 2.125 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-170-5177, 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
7-211511177-3
NSN: 5310-01-170-5177
FSC: 5310 — Nuts and Washers
CAGE: 8V613 — THE BOEING COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OVERALL
thickness0.155 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN
hole_diameter1.380 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN
overall_diameter2.125 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
inside_left_corner_chamfer_angle45.0 DEGREES NOMINAL
inside_right_corner_chamfer_angle45.0 DEGREES NOMINAL
material_document_and_classificationAMS 5643,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-170-5177
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7-211511177-3 · 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
•
OVERALL DIAMETER: 2.125 INCHES NOMINAL IN
•
INSIDE RIGHT CORNER CHAMFER ANGLE: 45.0 DEGREES NOMINAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
INSIDE LEFT CORNER CHAMFER ANGLE: 45.0 DEGREES NOMINAL
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 630 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER2.125 INCHES NOMINAL IN
INSIDE RIGHT CORNER CHAMFER ANGLE45.0 DEGREES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
INSIDE LEFT CORNER CHAMFER ANGLE45.0 DEGREES NOMINAL
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 630 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.380 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN
THICKNESS0.155 INCHES MINIMUM AND 0.165 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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7-211511177-3?
7-211511177-3 is a WASHER,FLAT.
What is the NSN for 7-211511177-3?
7-211511177-3 is cataloged in the U.S. Government catalog under NSN 5310-01-170-5177. 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.