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251538 — 251538

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

251538: 251538.

The 251538 is a the manufacturer industrial component. Key specifications include special_features: T.O.4S2-70-4 FIG 2-3, end_item_identification: NHA GEAR BOX, RIGHT ANGLE,RIGHT SIDE;NSN 1620-01-160-6351;E/I C-5 MAIN LANDING GEAR, specification/standard_data: 81349-MS-DTL-22499 GOVERNMENT SPECIFICATION. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-069-5573, 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
251538
NSN: 5305-00-069-5573
NIINs: 000695573, 014734085
FSC: 5305 — Screws
CAGE: H0001 — DAF TRUCKS N.V. (NLD)
SPECIFICATIONS
special_featuresT.O.4S2-70-4 FIG 2-3
bolt_hole_quantity6
end_item_identificationNHA GEAR BOX, RIGHT ANGLE,RIGHT SIDE;NSN 1620-01-160-6351;E/I C-5 MAIN LANDING GEAR
specification/standard_data81349-MS-DTL-22499 GOVERNMENT SPECIFICATION
NSN5305-00-069-5573
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 251538 · 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
•
HEAD HEIGHT: 0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
HARDNESS RATING: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429,GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.438 INCHES IN
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN
FASTENER LENGTH0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.969 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J429,GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.438 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
SPECIFICATION/STANDARD DATA96906-MS90725-85 GOVERNMENT STANDARD
SUBSTITUTES & CROSS-REFERENCES 8
23612R1Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MS35289-85Reference document
Same NSN cross-reference
Reference document — Secondary reference
W1007-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
5305000695573Reference document
Same NSN cross-reference
Reference document — Informative reference only
MS35299-85Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS35293-85Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 251538?
251538 is a 251538.
What parts can replace 251538?
There are 8 known substitutes for 251538: 23612R1, MS35289-85, W1007-1 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 251538?
251538 is cataloged in the U.S. Government catalog under NSN 5305-00-069-5573. This indicates validated use in U.S. government and defense supply chains.
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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.