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Technical Data Sheet
PartsTable / COMPONENT / 55-AF L.H.
55-AF L.H. ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The 55-AF L.H. is a the manufacturer industrial component. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-063-9799, 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
55-AF L.H.
NSN: 5340-00-063-9799
FSC: 5340
CAGE: 27182 — A L HANSEN MANUFACTURING COMPANY (USA)
SPECIFICATIONS
Part Number55-AF L.H.
NSN5340-00-063-9799
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 55-AF L.H. 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
•
ACTION TYPE: SPRING
•
MOUNTING HOLE QUANTITY: 4
•
OPERATION METHOD: LEVER HANDLE LATCH BOLT
•
MATERIAL: STEEL CASE
•
BOLT TYPE: REVERSE BEVEL
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESHOLE DIAMETER:0.250 IN.;HOLE SPACING:0.875 IN. BY 3.625 IN. IN
ACTION TYPESPRING
MOUNTING HOLE QUANTITY4
OPERATION METHODLEVER HANDLE LATCH BOLT
MATERIALSTEEL CASE
BOLT TYPEREVERSE BEVEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
790Upgraded Successor
successor cross-reference
successor
1339AS769-1Upgraded Successor
successor cross-reference
successor
6H0-BUpgraded Successor
successor cross-reference
successor
496169Interchangeable
interchangeable cross-reference
interchangeable
500029-1Interchangeable
interchangeable cross-reference
interchangeable
650179Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55-AF L.H.?
55-AF L.H. is a 55-AF L.H..
What parts can replace 55-AF L.H.?
There are 13 known substitutes for 55-AF L.H.: 790, 1339AS769-1, 6H0-B and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 55-AF L.H.?
55-AF L.H. is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-063-9799. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026