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18TN346 — VALVE,SAFETY RELIEF

✓ Government record, cited
OSHKOSH DEFENSE LLC · GATE VALVE
PRODUCT OVERVIEW

18TN346: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a OSHKOSH DEFENSE LLC industrial component. This part is cataloged in the U.S. Government catalog under NSN 4820-01-214-8842, 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
18TN346
NSN: 4820-01-214-8842
FSC: 4820 — Valves, Nonpowered
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
Part Number18TN346
ManufacturerOSHKOSH DEFENSE LLC
NSN4820-01-214-8842
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 18TN346 · OSHKOSH DEFENSE LLC ⚠ 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
SUBSTITUTES & CROSS-REFERENCES 5
390 0011Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
391 0326Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
2HC279Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
391 0334Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4HC279Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 18TN346?
18TN346 is a VALVE,SAFETY RELIEF manufactured by OSHKOSH DEFENSE LLC.
What parts can replace 18TN346?
There are 5 known substitutes for 18TN346: 390 0011, 391 0326, 2HC279 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 18TN346?
18TN346 is cataloged in the U.S. Government catalog under NSN 4820-01-214-8842. 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.