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AN901 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AN901: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 1100 OVERALL, outside_diameter: 2.120 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 0.880 INCHES NOMINAL IN, surface_treatment: CADMIUM AND CHROMATE OVERALL, cross-sectional_thickness: 0.0478 INCHES MINIMUM AND 0.0538 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-171-6990, 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
AN901
NSN: 5330-00-171-6990
NIINs: 001716990, 001966676, 001966677, 001966678, 001966683, 001966684, 001966687, 001966696, 001966699, 001966708, 001966710, 001966711, 001966714, 002233310, 002233313, 002233317, 002233318, 005146113, 005146117, 005146120, 005146122
FSC: 5330 — Packing and Gasket Materials
CAGE: 88044 — AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 1100 OVERALL
outside_diameter2.120 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter0.880 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
cross-sectional_thickness0.0478 INCHES MINIMUM AND 0.0538 INCHES MAXIMUM IN
cross-sectional_shape_styleRECTANGULAR METAL
material_document_and_classificationQQ-A-561,TY 1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5330-00-171-6990
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AN901 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: 0.050 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-561,TYPE 1,CLASS 1/2 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.995 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.755 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY 1100 OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.050 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-561,TYPE 1,CLASS 1/2 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.995 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.755 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYSPACER,RING
MATERIALALUMINUM ALLOY 1100 OVERALL
SUBSTITUTES & CROSS-REFERENCES 4
287-1176P4Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
AN901-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN901-8ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
362-601-90108Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AN901?
AN901 is a GASKET.
What parts can replace AN901?
There are 4 known substitutes for AN901: 287-1176P4, AN901-8, AN901-8A and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN901?
AN901 is cataloged in the U.S. Government catalog under NSN 5330-00-171-6990. 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.