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Technical Data Sheet
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51499 — O-RING

✓ Government record, cited
Lindy · ORING SEAL
PRODUCT OVERVIEW

51499: O-RING.

Adds 3 high speed FireWire ports to your notebook! - Bus Type: ExpressCard/34 - Speed: Up to 400Mbps 1394a & 800Mbps 1394b - Card connectors: 1 x 6 Pin FireWire Female, 2 x Bilingual 9 pin FireWire Female - Chipset: Texas Instruments - Ideal for connecting FireWire peripherals, such as DV camcorders, scanners, drive housings etc., to your notebook - Built-in power jack (1.3mm) for optional power adapter for use when connected devices require powered FireWire ports - For use with computers which feature ExpressCard expansion slots - Compatible with Windows 98SE/ME/2000/XP/Vista/Windows 7 and Mac OS X v10.2.4 & above. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-007-5144, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
51499
NSN: 5331-01-007-5144
FSC: 5331 — O-ring
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
temp_rating-15.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter2.245 INCHES MINIMUM AND 2.295 INCHES MAXIMUM IN
center_hole_diameter1.835 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
NSN5331-01-007-5144
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 51499 MFR: Lindy ⚠ 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
•
TEMP RATING: -15.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 2.245 INCHES MINIMUM AND 2.295 INCHES MAXIMUM IN
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
CENTER HOLE DIAMETER: 1.835 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
TECHNICAL CHARACTERISTICS
TEMP RATING-15.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
OUTSIDE DIAMETER2.245 INCHES MINIMUM AND 2.295 INCHES MAXIMUM IN
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
ELONGATION PERCENTAGE125 MAXIMUM
CENTER HOLE DIAMETER1.835 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
SUBSTITUTES & CROSS-REFERENCES 9
6406593-MTPD-A16Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE-AMS7276Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
2-328V0747-75Reference document
Same NSN cross-reference
Reference document — Secondary reference
6406593-MTPD-B16Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-R-83248/1Reference document
Same NSN cross-reference
Reference document — Secondary reference
3423RA PIECE 20Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 51499?
51499 is a O-RING manufactured by Lindy.
What parts can replace 51499?
There are 9 known substitutes for 51499: 6406593-MTPD-A16, SAE-AMS7276, 2-328V0747-75 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51499?
51499 is cataloged in the U.S. Government catalog under NSN 5331-01-007-5144. 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.