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125640 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

125640: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 718 OVERALL, head_style: L SHAPE, overall_length: 2.175 INCHES MINIMUM AND 2.195 INCHES MAXIMUM IN, hardness_rating: 36.0 ROCKWELL C NOMINAL OVERALL, special_features: BORON DIFFUSION COAT TO DEPTH OF .0005 TO .0012, style_designator: ECCENTRIC. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-641-6741, 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
125640
NSN: 5330-00-641-6741
NIINs: 006416741, 013566121, 014836093
FSC: 5330 — Packing and Gasket Materials
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
materialNICKEL ALLOY 718 OVERALL
head_styleL SHAPE
overall_length2.175 INCHES MINIMUM AND 2.195 INCHES MAXIMUM IN
hardness_rating36.0 ROCKWELL C NOMINAL OVERALL
special_featuresBORON DIFFUSION COAT TO DEPTH OF .0005 TO .0012
style_designatorECCENTRIC
second_step_length1.822 INCHES MINIMUM AND 1.832 INCHES MAXIMUM IN
first_hole_diameter0.670 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN
first_step_diameter0.840 INCHES NOMINAL IN
second_step_diameter0.996 INCHES MINIMUM AND 0.997 INCHES MAXIMUM IN
hole_arrangement_styleBOTH END DRILLED
end_item_identificationF119
NSN5330-00-641-6741
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 125640 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
•
FSC APPLICATION DATA: ENGINE,RECIPROCATING,ACFT
•
CROSS-SECTIONAL THICKNESS: 0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
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STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: METAL WITH SOFT FILLER
•
OUTSIDE DIAMETER: 0.191 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN
•
APERTURE DIAMETER: 0.165 INCHES MINIMUM AND 0.167 INCHES MAXIMUM IN
•
MATERIAL: ASBESTOS AND COPPER OVERALL
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAENGINE,RECIPROCATING,ACFT
CROSS-SECTIONAL THICKNESS0.130 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL SHAPE STYLEMETAL WITH SOFT FILLER
OUTSIDE DIAMETER0.191 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN
APERTURE DIAMETER0.165 INCHES MINIMUM AND 0.167 INCHES MAXIMUM IN
MATERIALASBESTOS AND COPPER OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
AS125640Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 125640?
125640 is a GASKET.
What parts can replace 125640?
There is 1 known substitute for 125640: AS125640. Substitute compatibility should be verified for your specific system.
What is the NSN for 125640?
125640 is cataloged in the U.S. Government catalog under NSN 5330-00-641-6741. 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.