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551638 — HOSE ASSEMBLY,METALLIC

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

551638: HOSE ASSEMBLY,METALLIC.

The HOSE ASSEMBLY,METALLIC is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND STEEL OVERALL, hole_diameter: 0.562 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 6.750 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, aperture_diameter: 3.625 INCHES NOMINAL IN, bolt_circle_diameter: 4.625 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-610-5991, 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
551638
NSN: 5330-00-610-5991
NIINs: 006105991, 015316897
FSC: 5330 — Packing and Gasket Materials
CAGE: 40152 — VME AMERICAS INC SUB OF VME GROUP N V (USA)
SPECIFICATIONS
materialASBESTOS AND STEEL OVERALL
hole_diameter0.562 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width6.750 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
aperture_diameter3.625 INCHES NOMINAL IN
bolt_hole_quantity3
bolt_circle_diameter4.625 INCHES NOMINAL IN
outside_corner_radius0.562 INCHES NOMINAL IN
cross-sectional_thickness0.062 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL WITH SOFT FILLER
side_radius_from_bolt_circle5.188 INCHES NOMINAL IN
NSN5330-00-610-5991
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 551638 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 THICKNESS: 0.062 INCHES NOMINAL IN
•
SIDE RADIUS FROM BOLT CIRCLE: 5.188 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: METAL WITH SOFT FILLER
•
APERTURE DIAMETER: 3.625 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 3
•
BOLT CIRCLE DIAMETER: 4.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.062 INCHES NOMINAL IN
SIDE RADIUS FROM BOLT CIRCLE5.188 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
CROSS-SECTIONAL SHAPE STYLEMETAL WITH SOFT FILLER
OVERALL WIDTH6.750 INCHES NOMINAL IN
APERTURE DIAMETER3.625 INCHES NOMINAL IN
BOLT HOLE QUANTITY3
BOLT CIRCLE DIAMETER4.625 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS0.562 INCHES NOMINAL IN
MATERIALASBESTOS AND STEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 3
B10745ASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
55163861059911Reference document
Same NSN cross-reference
Reference document — Secondary reference
07-551638Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 551638?
551638 is a HOSE ASSEMBLY,METALLIC.
What parts can replace 551638?
There are 3 known substitutes for 551638: B10745A, 55163861059911, 07-551638. Substitute compatibility should be verified for your specific system.
What is the NSN for 551638?
551638 is cataloged in the U.S. Government catalog under NSN 5330-00-610-5991. 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.