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R171-31TK — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

R171-31TK: PACKING,PREFORMED.

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: PLASTIC OVERALL, peripheral_diameter: 0.875 INCHES NOMINAL IN, center_hole_diameter: 0.781 INCHES NOMINAL IN, cross-sectional_height: 0.031 INCHES NOMINAL IN, cross-sectional_thickness: 0.156 INCHES NOMINAL IN, cross-sectional_shape_style: CUP. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-671-7343, 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
R171-31TK
NSN: 5330-00-671-7343
FSC: 5330 — Packing and Gasket Materials
CAGE: 71454 — FMC TECHNOLOGIES INC DBA FMC FLUID CONTROL (USA)
SPECIFICATIONS
materialPLASTIC OVERALL
peripheral_diameter0.875 INCHES NOMINAL IN
center_hole_diameter0.781 INCHES NOMINAL IN
cross-sectional_height0.031 INCHES NOMINAL IN
cross-sectional_thickness0.156 INCHES NOMINAL IN
cross-sectional_shape_styleCUP
NSN5330-00-671-7343
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: R171-31TK 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: 0.156 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.031 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: CUP
•
PERIPHERAL DIAMETER: 0.875 INCHES NOMINAL IN
•
COLOR: WHITE
•
CENTER HOLE DIAMETER: 0.781 INCHES NOMINAL IN
•
MATERIAL: PLASTIC OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.156 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.031 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLECUP
PERIPHERAL DIAMETER0.875 INCHES NOMINAL IN
COLORWHITE
CENTER HOLE DIAMETER0.781 INCHES NOMINAL IN
MATERIALPLASTIC OVERALL
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 R171-31TK?
R171-31TK is a PACKING,PREFORMED.
What is the NSN for R171-31TK?
R171-31TK is cataloged in the U.S. Government catalog under NSN 5330-00-671-7343. 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.