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55287 — VALVE,REDUCING

✓ Government record, cited
Tactic · ORING SEAL
PRODUCT OVERVIEW

55287: VALVE,REDUCING.

This product is made in Finland, at Tactic Games' own responsible factory. Our own production ensures the traceability of all materials, and we were awarded the FSC certificate in 2021. We also monitor our carbon footprint closely.

This part is cataloged in the U.S. Government catalog under NSN 5331-00-297-9990, 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
55287
NSN: 5331-00-297-9990
NIINs: 002979990, 013174166, 016032852
FSC: 5331 — O-ring
CAGE: 30076 — HYSTER-YALE GROUP, INC. (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVSUP-WSS ACTIVITY HX QUALITY
NSN5331-00-297-9990
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 55287 MFR: Tactic ⚠ 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 HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.739 INCHES MINIMUM AND 1.785 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 1.478 INCHES MINIMUM AND 1.490 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.739 INCHES MINIMUM AND 1.785 INCHES MAXIMUM IN
CENTER HOLE DIAMETER1.478 INCHES MINIMUM AND 1.490 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
SUBSTITUTES & CROSS-REFERENCES 9
MS28775-222Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
N304-75-222Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
0619799Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
S8057A27Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
619799Reference document
Same NSN cross-reference
Reference document — Secondary reference
W 4072 610 ALSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Shelf-life managedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 55287?
55287 is a VALVE,REDUCING manufactured by Tactic.
What parts can replace 55287?
There are 9 known substitutes for 55287: MS28775-222, N304-75-222, 0619799 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 55287?
55287 is cataloged in the U.S. Government catalog under NSN 5331-00-297-9990. 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.