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B33871-331 — PACKING WITH RETAINER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

B33871-331: PACKING WITH RETAINER.

The PACKING WITH RETAINER is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING, construction: TWO-PIECE, retainer_thickness: 0.424 INCHES MINIMUM AND 0.434 INCHES MAXIMUM IN, packing_inside_diameter: 2.207 INCHES MINIMUM AND 2.243 INCHES MAXIMUM IN, material_document_and_classification: MIL-P-83461 MIL SPEC SINGLE MATERIAL RESPONSE PACKING. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-356-6645, 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
B33871-331
NSN: 5330-01-356-6645
FSC: 5330 — Packing and Gasket Materials
CAGE: 94697 — MOOG INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
constructionTWO-PIECE
retainer_thickness0.424 INCHES MINIMUM AND 0.434 INCHES MAXIMUM IN
packing_inside_diameter2.207 INCHES MINIMUM AND 2.243 INCHES MAXIMUM IN
material_document_and_classificationMIL-P-83461 MIL SPEC SINGLE MATERIAL RESPONSE PACKING
NSN5330-01-356-6645
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B33871-331 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
•
PACKING INSIDE DIAMETER: 2.207 INCHES MINIMUM AND 2.243 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-83461 MIL SPEC SINGLE MATERIAL RESPONSE PACKING
•
RETAINER THICKNESS: 0.424 INCHES MINIMUM AND 0.434 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
•
CONSTRUCTION: TWO-PIECE
TECHNICAL CHARACTERISTICS
PACKING INSIDE DIAMETER2.207 INCHES MINIMUM AND 2.243 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-83461 MIL SPEC SINGLE MATERIAL RESPONSE PACKING
RETAINER THICKNESS0.424 INCHES MINIMUM AND 0.434 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE RETAINER
CONSTRUCTIONTWO-PIECE
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 1
S38186-331Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B33871-331?
B33871-331 is a PACKING WITH RETAINER.
What parts can replace B33871-331?
There is 1 known substitute for B33871-331: S38186-331. Substitute compatibility should be verified for your specific system.
What is the NSN for B33871-331?
B33871-331 is cataloged in the U.S. Government catalog under NSN 5330-01-356-6645. 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.