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51A137B123 — RESISTOR,VARIABLE,NONWIRE WOUND,

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

51A137B123: RESISTOR,VARIABLE,NONWIRE WOUND,.

RESISTOR,VARIABLE,NONWIRE WOUND,. Key specifications include material: STEEL COMP 4130, slot_width: 0.310 INCHES NOMINAL IN, thread_size: 3.500 IN. -32 IN, thread_class: 3B, thread_length: 0.500 INCHES NOMINAL IN, overall_length: 1.000 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 4730-00-200-0586, 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
51A137B123
NSN: 4730-00-200-0586
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL COMP 4130
slot_width0.310 INCHES NOMINAL IN
thread_size3.500 IN. -32 IN
thread_class3B
thread_length0.500 INCHES NOMINAL IN
overall_length1.000 INCHES NOMINAL IN
style_designatorROUND SLOTTED, EXTERNAL THREAD, BOSS
thread_directionRIGHT-HAND
hole_or_slot_quantity9
screw_thread_locationINTERNAL
casehardening_indicatorNOT CASEHARDENED
smallest_inside_diameter3.236 INCHES MINIMUM AND 3.246 INCHES MAXIMUM IN
NSN4730-00-200-0586
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 51A137B123 · 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
•
HOLE OR SLOT QUANTITY: 9
•
THREAD LENGTH: 0.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: ROUND SLOTTED, EXTERNAL THREAD, BOSS
•
THREAD DIRECTION: RIGHT-HAND
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
THREAD SIZE: 3.500 IN. -32 IN
•
SCREW THREAD SERIES DESIGNATOR: UNS
TECHNICAL CHARACTERISTICS
HOLE OR SLOT QUANTITY9
THREAD LENGTH0.500 INCHES NOMINAL IN
STYLE DESIGNATORROUND SLOTTED, EXTERNAL THREAD, BOSS
OVERALL LENGTH1.000 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
CASEHARDENING INDICATORNOT CASEHARDENED
THREAD SIZE3.500 IN. -32 IN
SCREW THREAD SERIES DESIGNATORUNS
THREAD CLASS3B
MAJOR UNTHREADED OUTSIDE DIAMETER3.720 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
807-195Reference 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 51A137B123?
51A137B123 is a RESISTOR,VARIABLE,NONWIRE WOUND,.
What parts can replace 51A137B123?
There is 1 known substitute for 51A137B123: 807-195. Substitute compatibility should be verified for your specific system.
What is the NSN for 51A137B123?
51A137B123 is cataloged in the U.S. Government catalog under NSN 4730-00-200-0586. 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.