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4322690 PIECE 56 — 4322690 PIECE 56

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

4322690 PIECE 56: 4322690 PIECE 56.

The 4322690 PIECE 56 is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5315-01-452-3706, 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
4322690 PIECE 56
NSN: 5315-01-452-3706
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
Part Number4322690 PIECE 56
NSN5315-01-452-3706
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4322690 PIECE 56 · 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
•
FIRST END STYLE: SQUARE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-1222, GR B7 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
PIN OVERALL DIAMETER: 1.3730 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN
•
PIN OVERALL LENGTH: 4.000 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
SURFACE TREATMENT: CHROMIUM OVERALL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
FIRST END STYLESQUARE
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-1222, GR B7 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
PIN OVERALL DIAMETER1.3730 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN
PIN OVERALL LENGTH4.000 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
SPECIAL FEATURESFURNISHED W/ PROVISIONS FOR MOUNTING, ONE "BAR" ON EACH END
SURFACE TREATMENTCHROMIUM OVERALL
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 4
122-6600344 SH 8 PC 19Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
122-4322690 P/N 56Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
122-4322690 PIECE 56Reference document
Same NSN cross-reference
Reference document — Secondary reference
122-6600345 PC 19Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 4322690 PIECE 56?
4322690 PIECE 56 is a 4322690 PIECE 56.
What parts can replace 4322690 PIECE 56?
There are 4 known substitutes for 4322690 PIECE 56: 122-6600344 SH 8 PC 19, 122-4322690 P/N 56, 122-4322690 PIECE 56 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4322690 PIECE 56?
4322690 PIECE 56 is cataloged in the U.S. Government catalog under NSN 5315-01-452-3706. 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.
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U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.