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PartsTable / COMPONENT / MIL-DTL-8783/1
MIL-DTL-8783/1 ✓ 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 MIL-DTL-8783/1 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-013-2978, 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
MIL-DTL-8783/1
NSN: 4730-00-013-2978
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberMIL-DTL-8783/1
NSN4730-00-013-2978
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MIL-DTL-8783/1 · 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
•
FASTENING DEVICE TYPE: SELF-LOCKING HEXAGON NUT
•
STYLE DESIGNATOR: BAND
•
SURFACE TREATMENT: CADMIUM NUT
•
TEMP RATING: 500.0 FAHRENHEIT DEGF
•
MATERIAL: STEEL NUT
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONGRUMMAN A10 AIRCRAFT
FASTENING DEVICE TYPESELF-LOCKING HEXAGON NUT
STYLE DESIGNATORBAND
SURFACE TREATMENTCADMIUM NUT
TEMP RATING500.0 FAHRENHEIT DEGF
MATERIALSTEEL NUT
OVERALL WIDTH0.655 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM BOLT
SURFACE TREATMENTPASSIVATE BAND
MATERIALSTEEL CORROSION RESISTING BAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
MS21920-28Interchangeable
Same NIIN cross-reference
interchangeable
U80-28Interchangeable
Same NIIN cross-reference
interchangeable
RM76Interchangeable
Same NIIN cross-reference
interchangeable
IPD5H4450Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-DTL-8783/1?
MIL-DTL-8783/1 is a MIL-DTL-8783/1.
What parts can replace MIL-DTL-8783/1?
There are 4 known substitutes for MIL-DTL-8783/1: MS21920-28, U80-28, RM76 and 1 more. Substitute compatibility should be verified for your specific system.
Is MIL-DTL-8783/1 still available?
MIL-DTL-8783/1 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