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Technical Data Sheet
PartsTable / COMPONENT / 5165256
5165256 ✓ 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 PACKING NUT is a the manufacturer industrial component. Key specifications include material: STEEL, slot_width: 0.313 INCHES NOMINAL IN, thread_size: 2.375-12, thread_length: 0.344 INCHES NOMINAL IN, overall_length: 0.750 INCHES NOMINAL IN, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-202-7565, 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
5165256
NSN: 4730-00-202-7565
FSC: 4730
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL
slot_width0.313 INCHES NOMINAL IN
thread_size2.375-12
thread_length0.344 INCHES NOMINAL IN
overall_length0.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
seat_angle_in_deg45.0
length_to_shoulder0.625 INCHES NOMINAL IN
hole_or_slot_quantity6
screw_thread_locationEXTERNAL
thread_pitch_diameters+2.0154 TO 2.3194 INCHES IN
casehardening_indicatorNOT CASEHARDENED
NSN4730-00-202-7565
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 5165256 · 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
•
THREAD PITCH DIAMETERS: +2.0154 TO 2.3194 INCHES IN
•
THREAD SIZE: 2.375-12
•
SCREW THREAD SERIES DESIGNATOR: UN
•
SCREW THREAD LOCATION: EXTERNAL
•
LENGTH TO SHOULDER: 0.625 INCHES NOMINAL IN
•
MAJOR UNTHREADED OUTSIDE DIAMETER: 2.250 INCHES NOMINAL IN
•
SMALLEST INSIDE DIAMETER: 2.030 INCHES NOMINAL IN
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD PITCH DIAMETERS+2.0154 TO 2.3194 INCHES IN
THREAD SIZE2.375-12
SCREW THREAD SERIES DESIGNATORUN
SCREW THREAD LOCATIONEXTERNAL
LENGTH TO SHOULDER0.625 INCHES NOMINAL IN
MAJOR UNTHREADED OUTSIDE DIAMETER2.250 INCHES NOMINAL IN
SMALLEST INSIDE DIAMETER2.030 INCHES NOMINAL IN
MATERIALSTEEL
UNTHREADED PORTION LENGTH0.407 INCHES NOMINAL IN
LARGEST INSIDE DIAMETER2.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
21584Interchangeable
interchangeable cross-reference
interchangeable
200346Interchangeable
interchangeable cross-reference
interchangeable
30571Interchangeable
interchangeable cross-reference
interchangeable
2824PC3Interchangeable
interchangeable cross-reference
interchangeable
221384PC2Interchangeable
interchangeable cross-reference
interchangeable
365739PC3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5165256?
5165256 is a PACKING NUT.
What parts can replace 5165256?
There are 7 known substitutes for 5165256: 21584, 200346, 30571 and 4 more. Substitute compatibility should be verified for your specific system.
Is 5165256 still available?
5165256 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