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277A-35 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

277A-35: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL, hole_diameter: 0.313 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, aperture_diameter: 2.750 INCHES NOMINAL IN, bolt_circle_diameter: 4.000 INCHES NOMINAL IN, cross-sectional_thickness: 0.063 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-391-4338, 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
277A-35
NSN: 5330-01-391-4338
FSC: 5330 — Packing and Gasket Materials
CAGE: 55242 — ISOMETRICS INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
hole_diameter0.313 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
aperture_diameter2.750 INCHES NOMINAL IN
bolt_hole_quantity3
bolt_circle_diameter4.000 INCHES NOMINAL IN
cross-sectional_thickness0.063 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
gasket_center_to_flat_distance2.000 INCHES NOMINAL IN
gasket_center_to_second_flat_distance2.000 INCHES NOMINAL IN
NSN5330-01-391-4338
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 277A-35 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: 0.063 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
•
GASKET CENTER TO FLAT DISTANCE: 2.000 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
APERTURE DIAMETER: 2.750 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 3
•
BOLT CIRCLE DIAMETER: 4.000 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
•
GASKET CENTER TO SECOND FLAT DISTANCE: 2.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.063 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN
GASKET CENTER TO FLAT DISTANCE2.000 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
APERTURE DIAMETER2.750 INCHES NOMINAL IN
BOLT HOLE QUANTITY3
BOLT CIRCLE DIAMETER4.000 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
GASKET CENTER TO SECOND FLAT DISTANCE2.000 INCHES NOMINAL IN
HOLE DIAMETER0.313 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 277A-35?
277A-35 is a GASKET.
What is the NSN for 277A-35?
277A-35 is cataloged in the U.S. Government catalog under NSN 5330-01-391-4338. 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.