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PartsTable / COMPONENT / 1551F11-2
1551F11-2 ✓ 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 STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 0.625 INCHES NOMINAL IN, material: COPPER ALLOY 360 OVERALL, thread_length: 0.625 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN, style_designator: INTERNALLY THREADED FULL LENGTH, surface_treatment: CADMIUM OVERALL, width_across_flats: 0.250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-058-1078, 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
1551F11-2
NSN: 5340-00-058-1078
FSC: 5340
CAGE: 81312 — WINCHESTER INTERCONNECT CORPORATION DBA WINCHESTER INTERCONNECT DIV WINCHESTER INTERCONNECT (USA)
SPECIFICATIONS
length0.625 INCHES NOMINAL IN
materialCOPPER ALLOY 360 OVERALL
thread_length0.625 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
style_designatorINTERNALLY THREADED FULL LENGTH
surface_treatmentCADMIUM OVERALL
width_across_flats0.250 INCHES NOMINAL IN
cross-sectional_shapeHEXAGON
material_document_and_classificationQQ-A-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5340-00-058-1078
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1551F11-2 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 SHAPE: HEXAGON
•
LENGTH: 0.625 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY 360 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD LENGTH: 0.625 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
•
STYLE DESIGNATOR: INTERNALLY THREADED FULL LENGTH
•
SURFACE TREATMENT: CADMIUM OVERALL
•
WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPEHEXAGON
LENGTH0.625 INCHES NOMINAL IN
MATERIALCOPPER ALLOY 360 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD LENGTH0.625 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
STYLE DESIGNATORINTERNALLY THREADED FULL LENGTH
SURFACE TREATMENTCADMIUM OVERALL
WIDTH ACROSS FLATS0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
5145Upgraded Successor
successor cross-reference
successor
94-1-6-83 CCUpgraded Successor
successor cross-reference
successor
F93L163Upgraded Successor
successor cross-reference
successor
RD11-32INPIL0TInterchangeable
interchangeable cross-reference
interchangeable
AS35411Interchangeable
interchangeable cross-reference
interchangeable
1692Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1551F11-2?
1551F11-2 is a STANDOFF,THREADED,SPACING.
What parts can replace 1551F11-2?
There are 18 known substitutes for 1551F11-2: 5145, 94-1-6-83 CC, F93L163 and 15 more. Substitute compatibility should be verified for your specific system.
Is 1551F11-2 still available?
1551F11-2 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026