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201439 — SWITCH,FLOW

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

201439: SWITCH,FLOW.

The SWITCH,FLOW is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 AND STEEL COMP 303 OVERALL, nut_height: 0.453 INCHES NOMINAL IN, teeth_type: STRAIGHT, thread_class: 3B, thread_series: UNF, overall_length: 0.2650 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-050-3350, 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→ 201439
NSN: 5310-00-050-3350
NIINs: 000503350, 002351737, 013211404, 015123586, 016227238
FSC: 5310 — Nuts and Washers
CAGE: 02978 — RENK AMERICA LLC DIV RENK AMERICA (USA)
SPECIFICATIONS
materialSTEEL COMP 302 AND STEEL COMP 303 OVERALL
nut_height0.453 INCHES NOMINAL IN
teeth_typeSTRAIGHT
thread_class3B
thread_seriesUNF
overall_length0.2650 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
pitch_diameter0.5000 INCHES NOMINAL IN
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
special_featuresCOMPLETE BONNET ASSEMBLY TO FLOW SWITCH
style_designatorSOLID, EXTERNAL FLANGE ONE END
thread_directionRIGHT-HAND
attachment_methodMOUNTING HOLE
NSN5310-00-050-3350
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 201439 · 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
•
WIDTH ACROSS FLATS: 0.563 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT HEIGHT: 0.453 INCHES NOMINAL IN
•
THREAD CLASS: 3B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.563 INCHES NOMINAL IN
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT0.453 INCHES NOMINAL IN
THREAD CLASS3B
THREAD QUANTITY PER INCH24
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 6
N3311CReference document
Same NSN cross-reference
Reference document — Secondary reference
126005Reference document
Same NSN cross-reference
Reference document — Secondary reference
5A0687Reference document
Same NSN cross-reference
Reference document — Secondary reference
29E064Reference document
Same NSN cross-reference
Reference document — Secondary reference
144419HReference document
Same NSN cross-reference
Reference document — Secondary reference
3044011Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 201439?
201439 is a SWITCH,FLOW. It is classified as a MRO (MRO_GENERAL).
What parts can replace 201439?
There are 6 known substitutes for 201439: N3311C, 126005, 5A0687 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 201439?
201439 is cataloged in the U.S. Government catalog under NSN 5310-00-050-3350. 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.