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826529 ✓ 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, thread_size: 5/16IN-12 IN, thread_class: 2A A, thread_length: 0.500 INCHES NOMINAL IN, overall_length: 1.188 INCHES NOMINAL IN, style_designator: HEXAGON, EXTERNAL THREAD, BOSS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-834-4704, 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
826529
NSN: 4730-00-834-4704
FSC: 4730
CAGE: 06141 — L3 AVIATION PRODUCTS, INC. DBA L3 TECHNOLOGIES (USA)
SPECIFICATIONS
materialSTEEL
thread_size5/16IN-12 IN
thread_class2A A
thread_length0.500 INCHES NOMINAL IN
overall_length1.188 INCHES NOMINAL IN
style_designatorHEXAGON, EXTERNAL THREAD, BOSS
thread_directionRIGHT-HAND
width_across_flats1.438 INCHES NOMINAL IN
screw_thread_locationEXTERNAL
casehardening_indicatorNOT CASEHARDENED
smallest_inside_diameter0.860 INCHES NOMINAL IN
screw_thread_series_designatorUN
NSN4730-00-834-4704
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 826529 · 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 DIRECTION: RIGHT-HAND
•
WIDTH ACROSS FLATS: 1.438 INCHES NOMINAL IN
•
SMALLEST INSIDE DIAMETER: 0.860 INCHES NOMINAL IN
•
SCREW THREAD LOCATION: EXTERNAL
•
MATERIAL: STEEL
•
THREAD LENGTH: 0.500 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 2757, SANGAMO ELECTRIC CO MFR REF SINGLE MATERIAL RESPONSE
•
STYLE DESIGNATOR: HEXAGON, EXTERNAL THREAD, BOSS
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS1.438 INCHES NOMINAL IN
SMALLEST INSIDE DIAMETER0.860 INCHES NOMINAL IN
SCREW THREAD LOCATIONEXTERNAL
MATERIALSTEEL
THREAD LENGTH0.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION2757, SANGAMO ELECTRIC CO MFR REF SINGLE MATERIAL RESPONSE
STYLE DESIGNATORHEXAGON, EXTERNAL THREAD, BOSS
SCREW THREAD SERIES DESIGNATORUN
THREAD CLASS2A A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
M1224-6Interchangeable
interchangeable cross-reference
interchangeable
1224-6Interchangeable
interchangeable cross-reference
interchangeable
1224Interchangeable
interchangeable cross-reference
interchangeable
150 46Interchangeable
interchangeable cross-reference
interchangeable
2012-T 46Interchangeable
interchangeable cross-reference
interchangeable
13346Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 826529?
826529 is a PACKING NUT.
What parts can replace 826529?
There are 9 known substitutes for 826529: M1224-6, 1224-6, 1224 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 826529?
826529 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-834-4704. 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