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518670 — BRACKET,ENGINE MOUNT

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

518670: BRACKET,ENGINE MOUNT.

The BRACKET,ENGINE MOUNT is a the manufacturer industrial component. Key specifications include gear_material: STEEL, shaft_end_type: CIRCULAR GROOVED AND PLAIN, shaft_material: STEEL, gear_location_on_shaft: OFF CENTER BETWEEN ENDS OF SHAFT. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-880-5943, 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
518670
NSN: 5305-00-880-5943
NIINs: 008805943, 009069370
FSC: 5305 — Screws
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
gear_materialSTEEL
shaft_end_typeCIRCULAR GROOVED AND PLAIN
shaft_materialSTEEL
gear_location_on_shaftOFF CENTER BETWEEN ENDS OF SHAFT
NSN5305-00-880-5943
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 518670 · 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
•
SCREW SURFACE TREATMENT: PASSIVATE
•
FASTENER LENGTH: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD LENGTH: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
•
HARDNESS RATING: 25.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: FLAT COUNTERSUNK
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
SCREW SURFACE TREATMENTPASSIVATE
FASTENER LENGTH0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5735 ASSN STD SINGLE MATERIAL RESPONSE
THREAD LENGTH0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFLAT COUNTERSUNK
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALIRON ALLOY 660
NONSTANDARD THREAD PITCH DIAMETER+0.2210 TO 0.2240 INCHES IN
SUBSTITUTES & CROSS-REFERENCES 1
388777Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 518670?
518670 is a BRACKET,ENGINE MOUNT.
What parts can replace 518670?
There is 1 known substitute for 518670: 388777. Substitute compatibility should be verified for your specific system.
What is the NSN for 518670?
518670 is cataloged in the U.S. Government catalog under NSN 5305-00-880-5943. 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.