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SL-4234 PIECE 53 — NUT,UNION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

SL-4234 PIECE 53: NUT,UNION.

The NUT,UNION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: ROUND, nut_height: 1.250 INCHES NOMINAL IN, nut_diameter: 2.500 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-203-8702, 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
SL-4234 PIECE 53
NSN: 4730-01-203-8702
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0UBG9 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DIV EPD (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleROUND
nut_height1.250 INCHES NOMINAL IN
nut_diameter2.500 INCHES NOMINAL IN
thread_class2B
thread_seriesUNS
shoulder_width0.188 INCHES NOMINAL IN
thread_directionRIGHT-HAND
nominal_thread_size2.125 INCHES IN
shoulder_step_width0.438 INCHES NOMINAL IN
drilled_hole_diameter0.312 INCHES NOMINAL IN
hole_type_and_quantity3 DRILLED
NSN4730-01-203-8702
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: SL-4234 PIECE 53 · 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
•
SHOULDER STEP WIDTH: 0.438 INCHES NOMINAL IN
•
SHOULDER WIDTH: 0.188 INCHES NOMINAL IN
•
THREAD SERIES: UNS
•
HOLE CONFIGURATION STYLE: CONFIGURATION F
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 2.125 INCHES IN
•
NUT DIAMETER: 2.500 INCHES NOMINAL IN
•
NUT HEIGHT: 1.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SHOULDER STEP WIDTH0.438 INCHES NOMINAL IN
SHOULDER WIDTH0.188 INCHES NOMINAL IN
THREAD SERIESUNS
HOLE CONFIGURATION STYLECONFIGURATION F
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE2.125 INCHES IN
NUT DIAMETER2.500 INCHES NOMINAL IN
NUT HEIGHT1.250 INCHES NOMINAL IN
DRILLED HOLE DIAMETER0.312 INCHES NOMINAL IN
NUT STYLEROUND
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 2
SL-4234Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
4666PReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SL-4234 PIECE 53?
SL-4234 PIECE 53 is a NUT,UNION.
What parts can replace SL-4234 PIECE 53?
There are 2 known substitutes for SL-4234 PIECE 53: SL-4234, 4666P. Substitute compatibility should be verified for your specific system.
What is the NSN for SL-4234 PIECE 53?
SL-4234 PIECE 53 is cataloged in the U.S. Government catalog under NSN 4730-01-203-8702. 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.