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520999 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

520999: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include movement_type: MOVING COIL, PERMANENT MAGNET, movement_suspension_method: JEWEL PIVOT BASE, circuit_current_for_which_designed: DC, dielectric_withstanding_voltage_in_volts: 500.0. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-313-6561, 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
520999
NSN: 5306-00-313-6561
NIINs: 003136561, 010304089
FSC: 5306 — Bolts
CAGE: 03104 — TELEDYNE BROWN ENGINEERING, INC. DBA TELEDYNE TURBINE ENGINES DIV TELEDYNE TURBINE ENGINES (USA)
SPECIFICATIONS
movement_typeMOVING COIL, PERMANENT MAGNET
movement_suspension_methodJEWEL PIVOT BASE
circuit_current_for_which_designedDC
dielectric_withstanding_voltage_in_volts500.0
NSN5306-00-313-6561
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 520999 · 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
•
SURFACE FINISH: 60.0 MICROINCHES BEARING SURFACE OF HEAD
•
FASTENER LENGTH: 0.280 INCHES NOMINAL IN
•
THREAD LENGTH: 0.209 INCHES MINIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH BETWEEN FLATS: 0.431 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
•
THREAD CLASS: 3A A
TECHNICAL CHARACTERISTICS
SURFACE FINISH60.0 MICROINCHES BEARING SURFACE OF HEAD
FASTENER LENGTH0.280 INCHES NOMINAL IN
THREAD LENGTH0.209 INCHES MINIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.431 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN
THREAD CLASS3A A
THREAD QUANTITY PER INCH28
MATERIALSTEEL OVERALL
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 520999?
520999 is a BOLT,MACHINE.
What is the NSN for 520999?
520999 is cataloged in the U.S. Government catalog under NSN 5306-00-313-6561. 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.