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S561 — SWITCH,PUSH

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

S561: SWITCH,PUSH.

The SWITCH,PUSH is a the manufacturer industrial component. Key specifications include thickness: 0.188 INCHES NOMINAL IN, hole_diameter: 1.000 INCHES NOMINAL IN, overall_diameter: 1.344 INCHES NOMINAL IN, special_features: INTERLOCK MICRO SWITCH, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-291-9737, 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
S561
NSN: 5310-00-291-9737
NIINs: 002919737, 016213528
FSC: 5310 — Nuts and Washers
CAGE: 03670 — TYCO FIRE PRODUCTS LP (USA)
SPECIFICATIONS
thickness0.188 INCHES NOMINAL IN
hole_diameter1.000 INCHES NOMINAL IN
overall_diameter1.344 INCHES NOMINAL IN
special_featuresINTERLOCK MICRO SWITCH
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationMODEL 401 ELECTRIC KNIFE SHARPENER
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-291-9737
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: S561 · 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: 1.344 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 1.000 INCHES NOMINAL IN
•
THICKNESS: 0.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.344 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.000 INCHES NOMINAL IN
THICKNESS0.188 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 S561?
S561 is a SWITCH,PUSH.
What is the NSN for S561?
S561 is cataloged in the U.S. Government catalog under NSN 5310-00-291-9737. 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.