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Technical Data Sheet
PartsTable / COMPONENT / 552H2
552H2 ✓ 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 COMP 1060, end_style: VERTEX CENTER OR ABOVE, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 0.562 INCHES NOMINAL IN, outside_diameter: 0.687 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-281-6711, 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
552H2
NSN: 5325-00-281-6711
FSC: 5325
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL COMP 1060
end_styleVERTEX CENTER OR ABOVE
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter0.562 INCHES NOMINAL IN
outside_diameter0.687 INCHES NOMINAL IN
material_diameter0.625 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating54.000 ROCKWELL C NOMINAL
cross-sectional_shape_styleROUND
material_document_and_classificationQQ-S633,1060 FED SPEC SINGLE MATERIAL RESPONSE
NSN5325-00-281-6711
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 552H2 · 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
•
RING STYLE: STRAIGHT GAP
•
MATERIAL HARDNESS RATING: 54.000 ROCKWELL C NOMINAL
•
INSIDE DIAMETER: 0.562 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1060
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S633,1060 FED SPEC SINGLE MATERIAL RESPONSE
•
END STYLE: VERTEX CENTER OR ABOVE
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
MATERIAL DIAMETER: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
RING STYLESTRAIGHT GAP
MATERIAL HARDNESS RATING54.000 ROCKWELL C NOMINAL
INSIDE DIAMETER0.562 INCHES NOMINAL IN
MATERIALSTEEL COMP 1060
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S633,1060 FED SPEC SINGLE MATERIAL RESPONSE
END STYLEVERTEX CENTER OR ABOVE
CROSS-SECTIONAL SHAPE STYLEROUND
MATERIAL DIAMETER0.625 INCHES NOMINAL IN
USAGE DESIGNEXTERNAL
OUTSIDE DIAMETER0.687 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
2307Interchangeable
interchangeable cross-reference
interchangeable
3842GInterchangeable
interchangeable cross-reference
interchangeable
230Interchangeable
interchangeable cross-reference
interchangeable
322535-1Interchangeable
interchangeable cross-reference
interchangeable
40-3020Interchangeable
interchangeable cross-reference
interchangeable
2816711Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 552H2?
552H2 is a RING,RETAINING.
What parts can replace 552H2?
There are 8 known substitutes for 552H2: 2307, 3842G, 230 and 5 more. Substitute compatibility should be verified for your specific system.
Is 552H2 still available?
552H2 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026