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831148 — STEM,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

831148: STEM,VALVE.

The STEM,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thread_series: UNIFIED NATIONAL COARSE (UNC), overall_height: 0.545 INCHES MINIMUM AND 0.569 INCHES MAXIMUM IN, surface_treatment: ZINC AND CHROMATE OVERALL, width_across_flats: 0.938 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-158-9983, 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
831148
NSN: 4820-01-158-9983
NIINs: 011589983, 015401914
FSC: 4820 — Valves, Nonpowered
CAGE: 82328 — DRESSER RAND CO TERRY CORP STEAM TURBINE MOTOR AND GENERATOR CO A JOINT VENTURE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
thread_class3
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height0.545 INCHES MINIMUM AND 0.569 INCHES MAXIMUM IN
surface_treatmentZINC AND CHROMATE OVERALL
width_across_flats0.938 INCHES NOMINAL IN
nominal_thread_size0.625 INCHES IN
thread_tolerance_classB INTERNAL
end_item_identification2330-01-508-7887
washer_outside_diameter1.248 INCHES MINIMUM AND 1.281 INCHES MAXIMUM IN
thread_quantity_per_inch11
NSN4820-01-158-9983
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 831148 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONTURBINE STEAM
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 831148?
831148 is a STEM,VALVE.
What is the NSN for 831148?
831148 is cataloged in the U.S. Government catalog under NSN 4820-01-158-9983. 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.