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257956 — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

257956: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include end_item_identification: 2030-01-614-2258; MARINE DAVIT; P/N SN 2206, 2215, part_name_assigned_by_controlling_agency: VALVE, PROPORTIONAL RELIEF. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-617-8379, 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
257956
NSN: 4820-01-617-8379
NIINs: 016178379, 016184178
FSC: 4820 — Valves, Nonpowered
CAGE: 60848 — ALLIED SYSTEMS COMPANY DBA ALLIED SYSTEMS CO (USA)
SPECIFICATIONS
end_item_identification2030-01-614-2258; MARINE DAVIT; P/N SN 2206, 2215
part_name_assigned_by_controlling_agencyVALVE, PROPORTIONAL RELIEF
NSN4820-01-617-8379
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 257956 · 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
PART NAME ASSIGNED BY CONTROLLING AGENCYVALVE, PROPORTIONAL RELIEF
END ITEM IDENTIFICATION2030-01-614-2258; MARINE DAVIT; P/N SN 2206, 2215
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 257956?
257956 is a VALVE,SAFETY RELIEF.
What is the NSN for 257956?
257956 is cataloged in the U.S. Government catalog under NSN 4820-01-617-8379. 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.