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195821 — SWITCH,FLOW

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

195821: SWITCH,FLOW.

The SWITCH,FLOW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 416 OVERALL, thickness: 0.079 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN, hole_diameter: 0.316 INCHES MINIMUM AND 0.326 INCHES MAXIMUM IN, heat_treatment: ANNEALED, hardness_rating: 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM, overall_diameter: 0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-849-8281, 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
MRO→ MRO_GENERAL→ 195821
NSN: 5310-00-849-8281
NIINs: 008498281, 014905998
FSC: 5310 — Nuts and Washers
CAGE: 07KQ5 — DEFENSE & DEVELOPMENT ENTERPRISES LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 416 OVERALL
thickness0.079 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
hole_diameter0.316 INCHES MINIMUM AND 0.326 INCHES MAXIMUM IN
heat_treatmentANNEALED
hardness_rating28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
overall_diameter0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN
special_featuresRATING OF SWITCH, 0.5 AMPS, 110-220 VAC, VD OR 10 WATTS VAC
peripheral_shape_styleROUND
center_hole_shape_styleROUND
end_item_identificationFLOW SWITCH ASSY, UNION END/SOCKET WELD TAIL PIECE
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-849-8281
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 195821 · 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: 0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN
•
HEAT TREATMENT: ANNEALED
•
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 416 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN
HEAT TREATMENTANNEALED
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 416 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.316 INCHES MINIMUM AND 0.326 INCHES MAXIMUM IN
THICKNESS0.079 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 195821?
195821 is a SWITCH,FLOW. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 195821?
195821 is cataloged in the U.S. Government catalog under NSN 5310-00-849-8281. 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.