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Technical Data Sheet
PartsTable / COMPONENT / 509904
509904 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

CYLINDER ASSEMBLY,HYDRAULIC BRAK. Key specifications include special_features: PURPLE LIQUID; HYDROCARBON ODOR, fatty_material_type: MINERAL OIL, quantity_within_each_unit_package: 1.000 GALLONS, minimum_flash_point_and_test_method: 200.0 FAHRENHEIT PENSKY-MARTENS CLOSED CUP DEGF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-385-6716, 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
509904
NSN: 5306-00-385-6716
FSC: 5306
CAGE: 12204 — CHRYSLER REALTY COMPANY LLC DBA DAIMLER CHRYSLER (USA)
SPECIFICATIONS
special_featuresPURPLE LIQUID; HYDROCARBON ODOR
fatty_material_typeMINERAL OIL
quantity_within_each_unit_package1.000 GALLONS
minimum_flash_point_and_test_method200.0 FAHRENHEIT PENSKY-MARTENS CLOSED CUP DEGF
NSN5306-00-385-6716
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 509904 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SERIES DESIGNATOR: UNF
•
THREAD CLASS: 2A A
•
HEAD STYLE: FLAT CHAMFER
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP 1141 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD DIAMETER0.375 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
THREAD DIRECTIONRIGHT-HAND
THREAD SERIES DESIGNATORUNF
THREAD CLASS2A A
HEAD STYLEFLAT CHAMFER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 1141 OVERALL
END ITEM IDENTIFICATIONTRACTOR, FLIGHTLINE TOWING
THREAD LENGTH1.000 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
1250R122Interchangeable
interchangeable cross-reference
interchangeable
500387Interchangeable
interchangeable cross-reference
interchangeable
89-39-8Interchangeable
interchangeable cross-reference
interchangeable
1420-0314Interchangeable
interchangeable cross-reference
interchangeable
297-425Interchangeable
interchangeable cross-reference
interchangeable
04008-44-002Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 509904?
509904 is a CYLINDER ASSEMBLY,HYDRAULIC BRAK.
What parts can replace 509904?
There are 11 known substitutes for 509904: 1250R122, 500387, 89-39-8 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 509904?
509904 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-385-6716. 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