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9HB731 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

9HB731: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, end_style: VERTEX OUTSIDE PERIPHERY, ring_style: INTERNAL, major_thickness: 0.050 INCHES NOMINAL IN, outside_diameter: 1.250 INCHES NOMINAL IN, casehardening_indicator: NOT CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-374-5893, 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
9HB731
NSN: 5325-01-374-5893
FSC: 5325 — Fastening Devices
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL
end_styleVERTEX OUTSIDE PERIPHERY
ring_styleINTERNAL
major_thickness0.050 INCHES NOMINAL IN
outside_diameter1.250 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleRECTANGULAR
NSN5325-01-374-5893
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 9HB731 · 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
•
END STYLE: VERTEX OUTSIDE PERIPHERY
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 1.250 INCHES NOMINAL IN
•
MAJOR THICKNESS: 0.050 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: INTERNAL
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
END STYLEVERTEX OUTSIDE PERIPHERY
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER1.250 INCHES NOMINAL IN
MAJOR THICKNESS0.050 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEINTERNAL
MATERIALSTEEL
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES 3
3303Reference document
Same NSN cross-reference
Reference document — Secondary reference
Y00025036Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
3303-GReference document
Same NSN cross-reference
Reference document — Secondary reference
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 9HB731?
9HB731 is a RING,RETAINING.
What parts can replace 9HB731?
There are 3 known substitutes for 9HB731: 3303, Y00025036, 3303-G. Substitute compatibility should be verified for your specific system.
What is the NSN for 9HB731?
9HB731 is cataloged in the U.S. Government catalog under NSN 5325-01-374-5893. 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.