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D4930 — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

D4930: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), special_features: NEXT HIGHER ASSY; VALVE,RELIEF. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-464-3772, 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
D4930
NSN: 4820-01-464-3772
NIINs: 014643772, 014644168, 014644172, 014724838, 015730583, 015730610, 015732760
FSC: 4820 — Valves, Nonpowered
CAGE: 65079 — DANCO VALVE COMPANY (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleHEXAGON
nut_height0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
special_featuresNEXT HIGHER ASSY; VALVE,RELIEF
style_designatorANGLE
thread_directionRIGHT-HAND
width_across_flats0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
nominal_thread_size0.625 INCHES IN
bearing_surface_typeCHAMFERED
thread_pitch_diameters+0.5660 TO 0.5732 INCHES IN
NSN4820-01-464-3772
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: D4930 · 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
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESNEXT HIGHER ASSY; VALVE,RELIEF
MATERIALCOPPER ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
D49-8-15Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
D4930 REV F ITEM 31Same 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 D4930?
D4930 is a VALVE,SAFETY RELIEF.
What parts can replace D4930?
There are 2 known substitutes for D4930: D49-8-15, D4930 REV F ITEM 31. Substitute compatibility should be verified for your specific system.
What is the NSN for D4930?
D4930 is cataloged in the U.S. Government catalog under NSN 4820-01-464-3772. 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.