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2161969 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2161969: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1020 OVERALL, thickness: 0.190 INCHES NOMINAL IN, hole_diameter: 0.516 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN, overall_diameter: 1.859 INCHES MINIMUM AND 1.891 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-262-4712, 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
2161969
NSN: 5310-00-262-4712
FSC: 5310 — Nuts and Washers
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 1020 OVERALL
thickness0.190 INCHES NOMINAL IN
hole_diameter0.516 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
overall_diameter1.859 INCHES MINIMUM AND 1.891 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classification-QQ-S-633 CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-262-4712
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2161969 · 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: 1.859 INCHES MINIMUM AND 1.891 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: -QQ-S-633 CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 1020 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.516 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
•
THICKNESS: 0.190 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.859 INCHES MINIMUM AND 1.891 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION-QQ-S-633 CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1020 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.516 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
THICKNESS0.190 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 7
1829D394Reference document
Same NSN cross-reference
Reference document — Secondary reference
11A7079Reference document
Same NSN cross-reference
Reference document — Secondary reference
505T5Reference document
Same NSN cross-reference
Reference document — Secondary reference
427431Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
19FK0513Reference document
Same NSN cross-reference
Reference document — Secondary reference
441SZ95Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2161969?
2161969 is a WASHER,FLAT.
What parts can replace 2161969?
There are 7 known substitutes for 2161969: 1829D394, 11A7079, 505T5 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2161969?
2161969 is cataloged in the U.S. Government catalog under NSN 5310-00-262-4712. 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.