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552973 — SUPERCHARGER,ENGINE,NON-AIRCRAFT

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

552973: SUPERCHARGER,ENGINE,NON-AIRCRAFT.

SUPERCHARGER,ENGINE,NON-AIRCRAFT. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.125 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.281 INCHES MINIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-088-1616, 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
552973
NSN: 5306-00-088-1616
NIINs: 000881616, 007083557
FSC: 5306 — Bolts
CAGE: 1UVT5 — BRP US INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.125 INCHES NOMINAL IN
thread_class2A A
thread_length0.281 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.500 INCHES NOMINAL IN
shoulder_length0.104 INCHES MINIMUM AND 0.110 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.312 INCHES NOMINAL FIRST SHOULDER IN
surface_treatmentPASSIVATE OVERALL
width_between_flats0.500 INCHES NOMINAL IN
NSN5306-00-088-1616
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 552973 · 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: 0.125 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
SHOULDER LENGTH: 0.104 INCHES MINIMUM AND 0.110 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.312 INCHES NOMINAL FIRST SHOULDER IN
•
THREAD LENGTH: 0.281 INCHES MINIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.125 INCHES NOMINAL IN
FASTENER LENGTH0.500 INCHES NOMINAL IN
SHOULDER LENGTH0.104 INCHES MINIMUM AND 0.110 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER0.312 INCHES NOMINAL FIRST SHOULDER IN
THREAD LENGTH0.281 INCHES MINIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.500 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
1144PC173Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 552973?
552973 is a SUPERCHARGER,ENGINE,NON-AIRCRAFT.
What parts can replace 552973?
There is 1 known substitute for 552973: 1144PC173. Substitute compatibility should be verified for your specific system.
What is the NSN for 552973?
552973 is cataloged in the U.S. Government catalog under NSN 5306-00-088-1616. 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.