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D403-1 — DISK,RUPTURABLE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

D403-1: DISK,RUPTURABLE.

The DISK,RUPTURABLE is a the manufacturer industrial component. Key specifications include disk_size: 2.000 INCHES IN, disk_material: NICKEL ALLOY, burst_pressure: 460.0 PRESSURE POUNDS PER SQUARE INCH GAGE, special_features: THICKNESS:THICKNESS:0.016 IN.NOM IN, cross-sectional_shape: CONCAVE. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-117-3786, 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
D403-1
NSN: 4820-01-117-3786
FSC: 4820 — Valves, Nonpowered
CAGE: 06370 — FIKE CORPORATION (USA)
SPECIFICATIONS
disk_size2.000 INCHES IN
disk_materialNICKEL ALLOY
burst_pressure460.0 PRESSURE POUNDS PER SQUARE INCH GAGE
special_featuresTHICKNESS:THICKNESS:0.016 IN.NOM IN
cross-sectional_shapeCONCAVE
NSN4820-01-117-3786
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: D403-1 · 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
•
DISK MATERIAL: NICKEL ALLOY
•
BURST PRESSURE: 460.0 PRESSURE POUNDS PER SQUARE INCH GAGE
•
CROSS-SECTIONAL SHAPE: CONCAVE
•
DISK SIZE: 2.000 INCHES IN
TECHNICAL CHARACTERISTICS
DISK MATERIALNICKEL ALLOY
BURST PRESSURE460.0 PRESSURE POUNDS PER SQUARE INCH GAGE
CROSS-SECTIONAL SHAPECONCAVE
SPECIAL FEATURESTHICKNESS:THICKNESS:0.016 IN.NOM IN
DISK SIZE2.000 INCHES IN
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 2
A4374-1Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
A4374-1 ITEM 6Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 D403-1?
D403-1 is a DISK,RUPTURABLE.
What parts can replace D403-1?
There are 2 known substitutes for D403-1: A4374-1, A4374-1 ITEM 6. Substitute compatibility should be verified for your specific system.
What is the NSN for D403-1?
D403-1 is cataloged in the U.S. Government catalog under NSN 4820-01-117-3786. 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.