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S203PC11 — LOCKNUT,TUBE FITTING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

S203PC11: LOCKNUT,TUBE FITTING.

The LOCKNUT,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 903 OVERALL, nut_style: TUBE FITTING LOCKNUT, nut_height: 0.562 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN, special_features: MATERIAL IS GUNMETAL. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-196-7432, 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
S203PC11
NSN: 4730-01-196-7432
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 93591 — PENTAIR VALVES & CONTROLS US LP DIV FLOW CONTROL US HOLDING CORP (USA)
SPECIFICATIONS
materialCOPPER ALLOY 903 OVERALL
nut_styleTUBE FITTING LOCKNUT
nut_height0.562 INCHES NOMINAL IN
thread_class2B
thread_seriesUN
special_featuresMATERIAL IS GUNMETAL
thread_directionRIGHT-HAND
width_across_flats2.500 INCHES NOMINAL IN
nominal_thread_size1.875 INCHES IN
packing_recess_depth0.188 INCHES NOMINAL IN
packing_recess_diameter2.125 INCHES NOMINAL IN
thread_quantity_per_inch12
NSN4730-01-196-7432
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: S203PC11 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 2.500 INCHES NOMINAL IN
•
PACKING RECESS DIAMETER: 2.125 INCHES NOMINAL IN
•
THREAD SERIES: UN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-M-16576 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.875 INCHES IN
•
NUT HEIGHT: 0.562 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS2.500 INCHES NOMINAL IN
PACKING RECESS DIAMETER2.125 INCHES NOMINAL IN
THREAD SERIESUN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-M-16576 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.875 INCHES IN
NUT HEIGHT0.562 INCHES NOMINAL IN
SPECIAL FEATURESMATERIAL IS GUNMETAL
NUT STYLETUBE FITTING LOCKNUT
THREAD CLASS2B
SUBSTITUTES & CROSS-REFERENCES 5
S-920Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
S-203Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
NK0670-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
S-920 PIECE 4Reference document
Same NSN cross-reference
Reference document — Secondary reference
S-203-11Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 S203PC11?
S203PC11 is a LOCKNUT,TUBE FITTING.
What parts can replace S203PC11?
There are 5 known substitutes for S203PC11: S-920, S-203, NK0670-1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S203PC11?
S203PC11 is cataloged in the U.S. Government catalog under NSN 4730-01-196-7432. 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.