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A291566 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A291566: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: STEEL COMP 1010, design_type: FRICTION, overall_diameter: 2.119 INCHES MINIMUM AND 2.123 INCHES MAXIMUM IN, special_features: 0.406 IN. HEIGHT IN, material_document_and_classification: SAE 1010 ASSN STD SINGLE MATERIAL RESPONSE, opening_inside_diameter_for_which_designed: 1.782 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN.

This part is cataloged in the U.S. Government catalog under NSN 5340-00-118-5041, 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
A291566
NSN: 5340-00-118-5041
FSC: 5340 — Hardware, Commercial
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 1010
design_typeFRICTION
overall_diameter2.119 INCHES MINIMUM AND 2.123 INCHES MAXIMUM IN
special_features0.406 IN. HEIGHT IN
material_document_and_classificationSAE 1010 ASSN STD SINGLE MATERIAL RESPONSE
opening_inside_diameter_for_which_designed1.782 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN
NSN5340-00-118-5041
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A291566 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
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 2.119 INCHES MINIMUM AND 2.123 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 1010 ASSN STD SINGLE MATERIAL RESPONSE
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 1.782 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1010
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER2.119 INCHES MINIMUM AND 2.123 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 1010 ASSN STD SINGLE MATERIAL RESPONSE
OPENING INSIDE DIAMETER FOR WHICH DESIGNED1.782 INCHES MINIMUM AND 1.797 INCHES MAXIMUM IN
SPECIAL FEATURES0.406 IN. HEIGHT IN
MATERIALSTEEL COMP 1010
SUBSTITUTES & CROSS-REFERENCES 1
2179543Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A291566?
A291566 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace A291566?
There is 1 known substitute for A291566: 2179543. Substitute compatibility should be verified for your specific system.
What is the NSN for A291566?
A291566 is cataloged in the U.S. Government catalog under NSN 5340-00-118-5041. 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.