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642-9BM — FELT,MECHANICAL,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

642-9BM: FELT,MECHANICAL,PREFORMED.

The FELT,MECHANICAL,PREFORMED is a the manufacturer industrial component. Key specifications include material: WOOL OVERALL, overall_width: 0.250 INCHES NOMINAL IN, overall_length: 2.500 INCHES NOMINAL IN, style_designator: RECTANGULAR, cross-sectional_width: 0.250 INCHES NOMINAL IN, cross-sectional_height: 0.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-691-1167, 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
642-9BM
NSN: 5330-00-691-1167
FSC: 5330 — Packing and Gasket Materials
CAGE: 88174 — INGERSOLL RAND CO ATHENS PLANT (USA)
SPECIFICATIONS
materialWOOL OVERALL
overall_width0.250 INCHES NOMINAL IN
overall_length2.500 INCHES NOMINAL IN
style_designatorRECTANGULAR
cross-sectional_width0.250 INCHES NOMINAL IN
cross-sectional_height0.250 INCHES NOMINAL IN
cross-sectional_shape_styleSQUARE
NSN5330-00-691-1167
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 642-9BM 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 HEIGHT: 0.250 INCHES NOMINAL IN
•
CROSS-SECTIONAL WIDTH: 0.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: RECTANGULAR
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE
•
MATERIAL: WOOL OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.250 INCHES NOMINAL IN
CROSS-SECTIONAL WIDTH0.250 INCHES NOMINAL IN
STYLE DESIGNATORRECTANGULAR
OVERALL LENGTH2.500 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESQUARE
OVERALL WIDTH0.250 INCHES NOMINAL IN
MATERIALWOOL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
9BM642Reference document
Same NSN cross-reference
Reference document — Secondary reference
4326-9BM642Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 642-9BM?
642-9BM is a FELT,MECHANICAL,PREFORMED.
What parts can replace 642-9BM?
There are 2 known substitutes for 642-9BM: 9BM642, 4326-9BM642. Substitute compatibility should be verified for your specific system.
What is the NSN for 642-9BM?
642-9BM is cataloged in the U.S. Government catalog under NSN 5330-00-691-1167. 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.