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734902-1 — SEAT,RELIEF VALVE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

734902-1: SEAT,RELIEF VALVE.

The SEAT,RELIEF VALVE is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: STEEL AMS5639,75.5 HARDNESS MAX R15N SCALE,0.360 IN. O/A LG IN.

This part is cataloged in the U.S. Government catalog under NSN 5330-00-001-6676, 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
734902-1
NSN: 5330-00-001-6676
NIINs: 000016676, 004516489, 015276271
FSC: 5330 — Packing and Gasket Materials
CAGE: 34519 — HARMONIC DRIVE L.L.C. (USA)
SPECIFICATIONS
general_characteristics_item_descriptionSTEEL AMS5639,75.5 HARDNESS MAX R15N SCALE,0.360 IN. O/A LG IN
NSN5330-00-001-6676
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 734902-1 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL THICKNESS: 0.015 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
MATERIAL: CORK AND RUBBER SYNTHETIC OVERALL
•
HOLE DIAMETER: 0.266 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.015 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
MATERIALCORK AND RUBBER SYNTHETIC OVERALL
HOLE DIAMETER0.266 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
SUBSTITUTES & CROSS-REFERENCES 1
6788Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 734902-1?
734902-1 is a SEAT,RELIEF VALVE.
What parts can replace 734902-1?
There is 1 known substitute for 734902-1: 6788. Substitute compatibility should be verified for your specific system.
What is the NSN for 734902-1?
734902-1 is cataloged in the U.S. Government catalog under NSN 5330-00-001-6676. 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.