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G255121-1 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

G255121-1: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 3.510 INCHES NOMINAL IN, length: 3.510 INCHES NOMINAL IN, material: ALUMINUM ALLOY 6061, slot_width: 0.144 INCHES NOMINAL IN, body_thickness: 0.090 INCHES NOMINAL IN, surface_treatment: CHROMATE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-243-9533, 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
G255121-1
NSN: 5340-01-243-9533
FSC: 5340 — Hardware, Commercial
CAGE: 3B150 — RAYTHEON COMPANY DBA RAYTHEON CO (USA)
SPECIFICATIONS
width3.510 INCHES NOMINAL IN
length3.510 INCHES NOMINAL IN
materialALUMINUM ALLOY 6061
slot_width0.144 INCHES NOMINAL IN
body_thickness0.090 INCHES NOMINAL IN
surface_treatmentCHROMATE
securing_device_typeSPECIAL
peripheral_shape_styleRECTANGLE, NO HOLES
cross-sectional_shape_styleFLAT W/OPEN CENTER
mounting_opening_shape_styleOPEN HORIZONTAL SLOT
material_document_and_classificationQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
surface_treatment_document_and_classificationMIL-C-5541 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
NSN5340-01-243-9533
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: G255121-1 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
•
LENGTH: 3.510 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
•
MOUNTING OPENING SHAPE STYLE: OPEN HORIZONTAL SLOT
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: FLAT W/OPEN CENTER
•
SECURING DEVICE TYPE: SPECIAL
•
SURFACE TREATMENT: CHROMATE
•
PERIPHERAL SHAPE STYLE: RECTANGLE, NO HOLES
TECHNICAL CHARACTERISTICS
LENGTH3.510 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
MOUNTING OPENING SHAPE STYLEOPEN HORIZONTAL SLOT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEFLAT W/OPEN CENTER
SECURING DEVICE TYPESPECIAL
SURFACE TREATMENTCHROMATE
PERIPHERAL SHAPE STYLERECTANGLE, NO HOLES
WIDTH3.510 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 6061
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
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)Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is G255121-1?
G255121-1 is a COVER,ACCESS.
What is the NSN for G255121-1?
G255121-1 is cataloged in the U.S. Government catalog under NSN 5340-01-243-9533. This indicates validated use in U.S. government and defense supply chains.
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