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566-6985431-42 — BOLT,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

566-6985431-42: BOLT,SHOULDER.

The BOLT,SHOULDER is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 502 OVERALL, head_style: FLAT FILLISTER, head_height: 0.500 INCHES NOMINAL IN, thread_class: 2B, head_diameter: 5.500 INCHES NOMINAL IN, thread_length: 2.655 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-491-9416, 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
566-6985431-42
NSN: 5306-01-491-9416
FSC: 5306 — Bolts
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY 502 OVERALL
head_styleFLAT FILLISTER
head_height0.500 INCHES NOMINAL IN
thread_class2B
head_diameter5.500 INCHES NOMINAL IN
thread_length2.655 INCHES NOMINAL IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length14.460 INCHES NOMINAL IN
shoulder_length11.120 INCHES MINIMUM AND 11.130 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter3.369 INCHES MINIMUM AND 3.371 INCHES MAXIMUM FIRST SHOULDER IN
end_item_identificationLOS ANGELES CLASS SSN (688), ROD ASSY CONN
NSN5306-01-491-9416
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 566-6985431-42 · 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: 0.500 INCHES NOMINAL IN
•
FASTENER LENGTH: 14.460 INCHES NOMINAL IN
•
SHOULDER LENGTH: 11.120 INCHES MINIMUM AND 11.130 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER DIAMETER: 3.369 INCHES MINIMUM AND 3.371 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 2.655 INCHES NOMINAL IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-286,FORM 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 2.000 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.500 INCHES NOMINAL IN
FASTENER LENGTH14.460 INCHES NOMINAL IN
SHOULDER LENGTH11.120 INCHES MINIMUM AND 11.130 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER3.369 INCHES MINIMUM AND 3.371 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH2.655 INCHES NOMINAL IN
SHOULDER SHAPEROUND FIRST SHOULDER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-286,FORM 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER2.000 INCHES IN
HEAD STYLEFLAT FILLISTER
THREAD DIRECTIONRIGHT-HAND
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES 1
H623-0503-42Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 566-6985431-42?
566-6985431-42 is a BOLT,SHOULDER.
What parts can replace 566-6985431-42?
There is 1 known substitute for 566-6985431-42: H623-0503-42. Substitute compatibility should be verified for your specific system.
What is the NSN for 566-6985431-42?
566-6985431-42 is cataloged in the U.S. Government catalog under NSN 5306-01-491-9416. 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.