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5901721 PIECE 4 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5901721 PIECE 4: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER CHLOROPRENE CLASS CR OVERALL, hole_diameter: 0.562 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 1.250 INCHES NOMINAL IN, overall_length: 7.000 INCHES NOMINAL IN, hardness_rating: 35.0 SHORE DUROMETER A MINIMUM AND 45.0 SHORE DUROMETER A MAXIMUM OVERALL, style_designator: NON-CIRCULAR. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-297-8263, 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
5901721 PIECE 4
NSN: 5330-01-297-8263
FSC: 5330 — Packing and Gasket Materials
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR OVERALL
hole_diameter0.562 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width1.250 INCHES NOMINAL IN
overall_length7.000 INCHES NOMINAL IN
hardness_rating35.0 SHORE DUROMETER A MINIMUM AND 45.0 SHORE DUROMETER A MAXIMUM OVERALL
style_designatorNON-CIRCULAR
bolt_hole_quantity3
cross-sectional_thickness0.125 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-R-6855,CLASS 2,GRADE 40 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
bolt_hole_centerline_to_nearest_edge_distance0.500 INCHES NOMINAL IN
outside_edge_to_bolt_hole_center_distance_along_length1.250 INCHES NOMINAL IN
NSN5330-01-297-8263
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5901721 PIECE 4 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: 0.125 INCHES NOMINAL IN
•
HARDNESS RATING: 35.0 SHORE DUROMETER A MINIMUM AND 45.0 SHORE DUROMETER A MAXIMUM OVERALL
•
STYLE DESIGNATOR: NON-CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-6855,CLASS 2,GRADE 40 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
BOLT HOLE CENTERLINE TO NEAREST EDGE DISTANCE: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.125 INCHES NOMINAL IN
HARDNESS RATING35.0 SHORE DUROMETER A MINIMUM AND 45.0 SHORE DUROMETER A MAXIMUM OVERALL
STYLE DESIGNATORNON-CIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-6855,CLASS 2,GRADE 40 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH7.000 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH1.250 INCHES NOMINAL IN
BOLT HOLE CENTERLINE TO NEAREST EDGE DISTANCE0.500 INCHES NOMINAL IN
BOLT HOLE QUANTITY3
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH2.250 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 4
2070-105 PIECE 4Reference document
Same NSN cross-reference
Reference document — Secondary reference
5901713 PIECE 4Reference document
Same NSN cross-reference
Reference document — Secondary reference
2070-97 PIECE 4Reference document
Same NSN cross-reference
Reference document — Secondary reference
2070-105 PC4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 5901721 PIECE 4?
5901721 PIECE 4 is a GASKET.
What parts can replace 5901721 PIECE 4?
There are 4 known substitutes for 5901721 PIECE 4: 2070-105 PIECE 4, 5901713 PIECE 4, 2070-97 PIECE 4 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5901721 PIECE 4?
5901721 PIECE 4 is cataloged in the U.S. Government catalog under NSN 5330-01-297-8263. 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.