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Technical Data Sheet
21045G ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 7.485 INCHES MINIMUM AND 7.495 INCHES MAXIMUM IN, length: 8.870 INCHES MINIMUM AND 8.880 INCHES MAXIMUM IN, material: ALUMINUM ALLOY 2024, body_thickness: 0.094 INCHES NOMINAL IN, cross-sectional_shape_style: FLAT, material_document_and_classification: QQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-100-4897, 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
21045G
NSN: 5340-01-100-4897
FSC: 5340
CAGE: 30377 — SMITHS AEROSPACE, INC., ELECTRONIC SYSTEMS-GRAND RAPIDS (USA)
SPECIFICATIONS
width7.485 INCHES MINIMUM AND 7.495 INCHES MAXIMUM IN
length8.870 INCHES MINIMUM AND 8.880 INCHES MAXIMUM IN
materialALUMINUM ALLOY 2024
body_thickness0.094 INCHES NOMINAL IN
cross-sectional_shape_styleFLAT
material_document_and_classificationQQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-100-4897
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21045G 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 SHAPE STYLE: FLAT
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE
MATERIAL: ALUMINUM ALLOY 2024
LENGTH: 8.870 INCHES MINIMUM AND 8.880 INCHES MAXIMUM IN
BODY THICKNESS: 0.094 INCHES NOMINAL IN
WIDTH: 7.485 INCHES MINIMUM AND 7.495 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLEFLAT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/4,T3 FED SPEC SINGLE MATERIAL RESPONSE
MATERIALALUMINUM ALLOY 2024
LENGTH8.870 INCHES MINIMUM AND 8.880 INCHES MAXIMUM IN
BODY THICKNESS0.094 INCHES NOMINAL IN
WIDTH7.485 INCHES MINIMUM AND 7.495 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
SM-D-58735Interchangeable
interchangeable cross-reference
interchangeable
21045Interchangeable
interchangeable cross-reference
interchangeable
181-61Interchangeable
interchangeable cross-reference
interchangeable
43209Interchangeable
interchangeable cross-reference
interchangeable
8351736Interchangeable
interchangeable cross-reference
interchangeable
5365008410265Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21045G?
21045G is a COVER,ACCESS.
What parts can replace 21045G?
There are 16 known substitutes for 21045G: SM-D-58735, 21045, 181-61 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21045G?
21045G is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-100-4897. This indicates validated use in U.S. government and defense supply chains.
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