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Technical Data Sheet
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643497 — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, end_style: VERTEX CENTER OR ABOVE, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 0.448 INCHES NOMINAL IN, outside_diameter: 0.546 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-281-1190, 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
643497
NSN: 5325-00-281-1190
FSC: 5325
CAGE: 58275 — SASCO INC CANADIAN DIV
SPECIFICATIONS
materialSTEEL
end_styleVERTEX CENTER OR ABOVE
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter0.448 INCHES NOMINAL IN
outside_diameter0.546 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN
material_diameter0.049 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleROUND
NSN5325-00-281-1190
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 643497 · 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
•
USAGE DESIGN: EXTERNAL
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
MATERIAL DIAMETER: 0.049 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
•
MATERIAL: STEEL
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: STRAIGHT GAP
•
OUTSIDE DIAMETER: 0.546 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN
•
END STYLE: VERTEX CENTER OR ABOVE
TECHNICAL CHARACTERISTICS (FLIS)
USAGE DESIGNEXTERNAL
CROSS-SECTIONAL SHAPE STYLEROUND
MATERIAL DIAMETER0.049 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
MATERIALSTEEL
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESTRAIGHT GAP
OUTSIDE DIAMETER0.546 INCHES MINIMUM AND 0.550 INCHES MAXIMUM IN
END STYLEVERTEX CENTER OR ABOVE
INSIDE DIAMETER0.448 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
41511Interchangeable
interchangeable cross-reference
interchangeable
45370Interchangeable
interchangeable cross-reference
interchangeable
D0AZ5255FInterchangeable
interchangeable cross-reference
interchangeable
5T2183Interchangeable
interchangeable cross-reference
interchangeable
94168Z1PC102Interchangeable
interchangeable cross-reference
interchangeable
6307-3127975PC17BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 643497?
643497 is a RING,RETAINING.
What parts can replace 643497?
There are 20 known substitutes for 643497: 41511, 45370, D0AZ5255F and 17 more. Substitute compatibility should be verified for your specific system.
Is 643497 still available?
643497 is currently cancelled.
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Last verified: September 2026