PartsTable
Technical Data Sheet
618173 ✓ 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 INVERTED NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 347, thread_size: 1 1/2-12, thread_class: 3A A, overall_length: 1.000 INCHES NOMINAL IN, special_features: 8 TABS ON DRIVE END E QUALLY SPACED,0.250 IN. W BY 0.340 IN.

LG IN, style_designator: INVERTED NUT, TUBE, FLARE. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-927-1230, 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
618173
NSN: 4730-00-927-1230
FSC: 4730
CAGE: 00405 — ALLIANT TECHSYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 347
thread_size1 1/2-12
thread_class3A A
overall_length1.000 INCHES NOMINAL IN
special_features8 TABS ON DRIVE END E QUALLY SPACED,0.250 IN. W BY 0.340 IN. LG IN
style_designatorINVERTED NUT, TUBE, FLARE
thread_directionRIGHT-HAND
seat_angle_in_deg45.0
surface_treatmentSILVER
width_across_flats1.365 INCHES NOMINAL IN
casehardening_indicatorCASEHARDENED
smallest_inside_diameter1.177 INCHES NOMINAL IN
NSN4730-00-927-1230
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 618173 · 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
CASEHARDENING INDICATOR: CASEHARDENED
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5646 ASSN STD SINGLE MATERIAL RESPONSE
SURFACE TREATMENT: SILVER
STYLE DESIGNATOR: INVERTED NUT, TUBE, FLARE
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.000 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATOR: UNS
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURES8 TABS ON DRIVE END E QUALLY SPACED,0.250 IN. W BY 0.340 IN. LG IN
CASEHARDENING INDICATORCASEHARDENED
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5646 ASSN STD SINGLE MATERIAL RESPONSE
SURFACE TREATMENTSILVER
STYLE DESIGNATORINVERTED NUT, TUBE, FLARE
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.000 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORUNS
OVERALL LENGTH1.000 INCHES NOMINAL IN
SMALLEST INSIDE DIAMETER1.177 INCHES NOMINAL IN
SEAT ANGLE IN DEG45.0
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
10409Interchangeable
interchangeable cross-reference
interchangeable
10409PC10Interchangeable
interchangeable cross-reference
interchangeable
6181-73Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 618173?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 618173?
618173 is a INVERTED NUT,TUBE COUPLING.
What parts can replace 618173?
There are 3 known substitutes for 618173: 10409, 10409PC10, 6181-73. Substitute compatibility should be verified for your specific system.
What is the NSN for 618173?
618173 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-927-1230. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 618173