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SW128-13 — DISK,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

SW128-13: DISK,VALVE.

The DISK,VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, thread_class: 2A A, overall_height: 2.250 INCHES NOMINAL IN, shank_diameter: 0.749 INCHES NOMINAL IN, flange_diameter: 1.380 INCHES NOMINAL IN, special_features: PARTS THAT ARE INCLUDED ARE, INSERT, PLATE, AND NUT. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-498-8871, 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
SW128-13
NSN: 4820-01-498-8871
FSC: 4820 — Valves, Nonpowered
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
materialNICKEL ALLOY
thread_class2A A
overall_height2.250 INCHES NOMINAL IN
shank_diameter0.749 INCHES NOMINAL IN
flange_diameter1.380 INCHES NOMINAL IN
special_featuresPARTS THAT ARE INCLUDED ARE, INSERT, PLATE, AND NUT
style_designatorPOPPET
nominal_thread_size0.250 INCHES IN
end_item_identificationSEAWOLF CLASS SSN
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN4820-01-498-8871
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: SW128-13 · 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
KEY FEATURES
•
SHANK DIAMETER: 0.749 INCHES NOMINAL IN
•
FLANGE DIAMETER: 1.380 INCHES NOMINAL IN
•
STYLE DESIGNATOR: POPPET
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.749 INCHES NOMINAL IN
FLANGE DIAMETER1.380 INCHES NOMINAL IN
OVERALL HEIGHT2.250 INCHES NOMINAL IN
STYLE DESIGNATORPOPPET
NOMINAL THREAD SIZE0.250 INCHES IN
SPECIAL FEATURESPARTS THAT ARE INCLUDED ARE, INSERT, PLATE, AND NUT
THREAD CLASS2A A
END ITEM IDENTIFICATIONSEAWOLF CLASS SSN
MATERIALNICKEL ALLOY
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SUBSTITUTES & CROSS-REFERENCES 2
B14584.004.000Reference document
Same NSN cross-reference
Reference document — Secondary reference
SW128Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SW128-13?
SW128-13 is a DISK,VALVE.
What parts can replace SW128-13?
There are 2 known substitutes for SW128-13: B14584.004.000, SW128. Substitute compatibility should be verified for your specific system.
What is the NSN for SW128-13?
SW128-13 is cataloged in the U.S. Government catalog under NSN 4820-01-498-8871. 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.