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1680561 — SHAFT,SHOULDERED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1680561: SHAFT,SHOULDERED.

The SHAFT,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thickness: 0.125 INCHES NOMINAL IN, hole_diameter: 0.531 INCHES NOMINAL IN, overall_width: 6.000 INCHES NOMINAL IN, end_similarity: IDENTICAL, overall_length: 7.5000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-481-2047, 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
1680561
NSN: 5310-01-481-2047
NIINs: 014812047, 014812053, 014812268, 014812271, 014812274, 014812278, 014812282, 014812296, 014813832, 014813837, 014814542, 014814551, 014877521
FSC: 5310 — Nuts and Washers
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thickness0.125 INCHES NOMINAL IN
hole_diameter0.531 INCHES NOMINAL IN
overall_width6.000 INCHES NOMINAL IN
step_quantity6
end_similarityIDENTICAL
overall_length7.5000 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES BOTTOM
first_end_styleINTERNAL THREADED
overall_diameter1.500 INCHES NOMINAL IN
second_end_styleEXTERNAL THREADED
special_features3/4-8 DOUBLE ACME THREADS,R.H. THREADS
NSN5310-01-481-2047
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1680561 · 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 FINISH: 125.0 MICROINCHES BOTTOM
•
OVERALL DIAMETER: 1.250 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-994 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES BOTTOM
SURFACE FINISH125.0 MICROINCHES TOP
OVERALL DIAMETER1.250 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-994 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
END ITEM IDENTIFICATIONDOOR ASSY-VSW
MATERIALCOPPER ALLOY OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.781 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
123-1680561 PC 21Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 1680561?
1680561 is a SHAFT,SHOULDERED.
What parts can replace 1680561?
There is 1 known substitute for 1680561: 123-1680561 PC 21. Substitute compatibility should be verified for your specific system.
What is the NSN for 1680561?
1680561 is cataloged in the U.S. Government catalog under NSN 5310-01-481-2047. 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.