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1128LM40520-1 — BOLT,FLUID PASSAGE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

1128LM40520-1: BOLT,FLUID PASSAGE.

The BOLT,FLUID PASSAGE is a the manufacturer industrial component. Key specifications include material: STEEL, body_style: SHOULDER, overall_length: 1.812 INCHES NOMINAL IN, hardness_rating: 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM, surface_treatment: CHROMIUM, concentric_hole_depth: 0.719 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-102-6677, 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
1128LM40520-1
NSN: 4730-00-102-6677
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL
body_styleSHOULDER
overall_length1.812 INCHES NOMINAL IN
hardness_rating39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
surface_treatmentCHROMIUM
concentric_hole_depth0.719 INCHES NOMINAL IN
first_end_thread_class3A A
concentric_hole_diameter0.125 INCHES NOMINAL IN
wrenching_feature_height0.062 INCHES NOMINAL IN
first_end_nominal_thread_size0.250 INCHES IN
first_radial_fluid_hole_diameter0.047 INCHES NOMINAL IN
first_end_thread_quantity_per_inch28
NSN4730-00-102-6677
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1128LM40520-1 · 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
•
FIRST END THREAD SERIES DESIGNATOR: UNIFIED NATIONAL JOINT FINE (UNJF)
•
LENGTH FROM BEARING SURFACE OF WRENCHING FEATURE TO END OF FIRST DIAMETER: 1.227 INCHES NOMINAL IN
•
BODY STYLE: SHOULDER
•
FIRST END THREAD CLASS: 3A A
•
FIRST END THREAD QUANTITY PER INCH: 28
•
SECOND DIAMETER FROM WRENCHING FEATURE: 0.260 INCHES NOMINAL IN
•
CONCENTRIC HOLE DEPTH: 0.719 INCHES NOMINAL IN
•
WRENCHING FEATURE HEIGHT: 0.062 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FIRST END THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
LENGTH FROM BEARING SURFACE OF WRENCHING FEATURE TO END OF FIRST DIAMETER1.227 INCHES NOMINAL IN
BODY STYLESHOULDER
FIRST END THREAD CLASS3A A
FIRST END THREAD QUANTITY PER INCH28
SECOND DIAMETER FROM WRENCHING FEATURE0.260 INCHES NOMINAL IN
CONCENTRIC HOLE DEPTH0.719 INCHES NOMINAL IN
WRENCHING FEATURE HEIGHT0.062 INCHES NOMINAL IN
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
OVERALL LENGTH1.812 INCHES NOMINAL IN
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1128LM40520-1?
1128LM40520-1 is a BOLT,FLUID PASSAGE.
What is the NSN for 1128LM40520-1?
1128LM40520-1 is cataloged in the U.S. Government catalog under NSN 4730-00-102-6677. 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.