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346690 — MANIFOLD,HYDRAULIC SYSTEM ACCESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

346690: MANIFOLD,HYDRAULIC SYSTEM ACCESS.

MANIFOLD,HYDRAULIC SYSTEM ACCESS. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, nut_style: ROUND, nut_diameter: 5.240 INCHES MINIMUM AND 5.260 INCHES MAXIMUM IN, thread_class: 3B, nut_thickness: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, thread_series: UN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-637-1030, 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
346690
NSN: 5310-00-637-1030
NIINs: 006371030, 013369248
FSC: 5310 — Nuts and Washers
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
nut_styleROUND
nut_diameter5.240 INCHES MINIMUM AND 5.260 INCHES MAXIMUM IN
thread_class3B
nut_thickness0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
thread_seriesUN
thread_directionRIGHT-HAND
drive_point_depth0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
drive_point_width0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
nominal_thread_size4.750 INCHES IN
drive_point_quantity8
thread_quantity_per_inch8
NSN5310-00-637-1030
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 346690 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD SERIES: UN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
DRIVE POINT WIDTH: 0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 4.750 INCHES IN
•
NUT DIAMETER: 5.240 INCHES MINIMUM AND 5.260 INCHES MAXIMUM IN
•
DRIVE POINT DEPTH: 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
•
NUT THICKNESS: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
DRIVE POINT WIDTH0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE4.750 INCHES IN
NUT DIAMETER5.240 INCHES MINIMUM AND 5.260 INCHES MAXIMUM IN
DRIVE POINT DEPTH0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
NUT THICKNESS0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
DRIVE POINT QUANTITY8
NUT STYLEROUND
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 346690?
346690 is a MANIFOLD,HYDRAULIC SYSTEM ACCESS.
What is the NSN for 346690?
346690 is cataloged in the U.S. Government catalog under NSN 5310-00-637-1030. 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.