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7521910 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

7521910: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1095, end_style: 90 DEGREE PARALLEL, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 0.552 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN, major_thickness: 0.061 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-752-1910, 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
7521910
NSN: 5325-00-752-1910
FSC: 5325 — Fastening Devices
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 1095
end_style90 DEGREE PARALLEL
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter0.552 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
major_thickness0.061 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
outside_diameter0.615 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
surface_treatmentCADMIUM OR ZINC
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating45.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationASTM A576, COMP 1095 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-752-1910
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 7521910 · 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
•
MATERIAL HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
END STYLE: 90 DEGREE PARALLEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A576, COMP 1095 ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 0.615 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.061 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.552 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
END STYLE90 DEGREE PARALLEL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A576, COMP 1095 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER0.615 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
MAJOR THICKNESS0.061 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
INSIDE DIAMETER0.552 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESTRAIGHT GAP
SUBSTITUTES & CROSS-REFERENCES 2
908A7Reference document
Same NSN cross-reference
Reference document — Secondary reference
913622Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 7521910?
7521910 is a RING,RETAINING.
What parts can replace 7521910?
There are 2 known substitutes for 7521910: 908A7, 913622. Substitute compatibility should be verified for your specific system.
What is the NSN for 7521910?
7521910 is cataloged in the U.S. Government catalog under NSN 5325-00-752-1910. 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.