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12-957-003 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12-957-003: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include end_item_identification: DRESSER BLOWER 33U-RAI. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-505-0798, 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
12-957-003
NSN: 5340-01-505-0798
FSC: 5340 — Hardware, Commercial
CAGE: 51729 — DRESSER, INC. DBA DRESSER ROOTS BLOWERS & COMPRESSORS DIV DRESSER ROOTS (USA)
SPECIFICATIONS
end_item_identificationDRESSER BLOWER 33U-RAI
NSN5340-01-505-0798
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12-957-003 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
TECHNICAL CHARACTERISTICS
END ITEM IDENTIFICATIONDRESSER BLOWER 33U-RAI
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 1
812-957-003Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 12-957-003?
12-957-003 is a COVER,ACCESS.
What parts can replace 12-957-003?
There is 1 known substitute for 12-957-003: 812-957-003. Substitute compatibility should be verified for your specific system.
What is the NSN for 12-957-003?
12-957-003 is cataloged in the U.S. Government catalog under NSN 5340-01-505-0798. This indicates validated use in U.S. government and defense supply chains.
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