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Technical Data Sheet
PartsTable / COMPONENT / 7M51-8
7M51-8 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The SLEEVE,FLARED,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OR STEEL COMP 4130, flange_width: 0.219 INCHES NOMINAL IN, overall_length: 0.562 INCHES NOMINAL IN, style_designator: SLEEVE, seat_angle_in_deg: 33.0, surface_treatment: CADMIUM AND CHROMATE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-089-6503, 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
7M51-8
NSN: 4730-01-089-6503
FSC: 4730
CAGE: 59945 — BAILEY HOSE INC (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP 4130
flange_width0.219 INCHES NOMINAL IN
overall_length0.562 INCHES NOMINAL IN
style_designatorSLEEVE
seat_angle_in_deg33.0
surface_treatmentCADMIUM AND CHROMATE
casehardening_indicatorNOT CASEHARDENED
flange_outside_diameter0.682 INCHES NOMINAL IN
sleeve_outside_diameter0.562 INCHES NOMINAL IN
metallic_hardness_rating35.0 MINIMUM ROCKWELL C AND 40.0 MAXIMUM ROCKWELL C
specification/standard_data76301-7-51 MANUFACTURERS SPECIFICATION
hose/tube_outside_diameter_for_which_designed0.500 INCHES NOMINAL IN
NSN4730-01-089-6503
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7M51-8 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: STEEL COMP 4140 OR STEEL COMP 4130
•
SURFACE TREATMENT: CADMIUM AND CHROMATE
•
STYLE DESIGNATOR: SLEEVE
•
SLEEVE OUTSIDE DIAMETER: 0.562 INCHES NOMINAL IN
•
FLANGE WIDTH: 0.219 INCHES NOMINAL IN
•
FLANGE OUTSIDE DIAMETER: 0.682 INCHES NOMINAL IN
•
SEAT ANGLE IN DEG: 33.0
•
METALLIC HARDNESS RATING: 35.0 MINIMUM ROCKWELL C AND 40.0 MAXIMUM ROCKWELL C
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 4140 OR STEEL COMP 4130
SURFACE TREATMENTCADMIUM AND CHROMATE
STYLE DESIGNATORSLEEVE
SLEEVE OUTSIDE DIAMETER0.562 INCHES NOMINAL IN
FLANGE WIDTH0.219 INCHES NOMINAL IN
FLANGE OUTSIDE DIAMETER0.682 INCHES NOMINAL IN
SEAT ANGLE IN DEG33.0
METALLIC HARDNESS RATING35.0 MINIMUM ROCKWELL C AND 40.0 MAXIMUM ROCKWELL C
CASEHARDENING INDICATORNOT CASEHARDENED
OVERALL LENGTH0.562 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
7M51-12Interchangeable
interchangeable cross-reference
interchangeable
7M51Interchangeable
interchangeable cross-reference
interchangeable
7M51-16Interchangeable
interchangeable cross-reference
interchangeable
7M51-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7M51-8?
7M51-8 is a SLEEVE,FLARED,TUBE FITTING.
What parts can replace 7M51-8?
There are 4 known substitutes for 7M51-8: 7M51-12, 7M51, 7M51-16 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7M51-8?
7M51-8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-089-6503. 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