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MS16634-4025 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MS16634-4025: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 632, ring_style: E BOWED, usage_design: EXTERNAL, end_play_takeup: 0.035 INCHES MAXIMUM IN, inside_diameter: 0.207 INCHES NOMINAL IN, major_thickness: 0.025 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-784-3892, 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
MS16634-4025
NSN: 5325-00-784-3892
FSC: 5325 — Fastening Devices
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 632
ring_styleE BOWED
usage_designEXTERNAL
end_play_takeup0.035 INCHES MAXIMUM IN
inside_diameter0.207 INCHES NOMINAL IN
major_thickness0.025 INCHES NOMINAL IN
surface_treatmentPASSIVATE
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating63.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.5 ROCKWELL SUPERFICIAL 30-N MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-R-21248 TYPE 2,CLASS3 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5325-00-784-3892
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS16634-4025 · 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: 63.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.5 ROCKWELL SUPERFICIAL 30-N MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-21248 TYPE 2,CLASS3 MIL SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
END PLAY TAKEUP: 0.035 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.025 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.207 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING63.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.5 ROCKWELL SUPERFICIAL 30-N MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-21248 TYPE 2,CLASS3 MIL SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
END PLAY TAKEUP0.035 INCHES MAXIMUM IN
MAJOR THICKNESS0.025 INCHES NOMINAL IN
INSIDE DIAMETER0.207 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEE BOWED
SURFACE TREATMENTPASSIVATE
SUBSTITUTES & CROSS-REFERENCES 5
5131-25HReference document
Same NSN cross-reference
Reference document — Secondary reference
416725-4025Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
5131-25WReference document
Same NSN cross-reference
Reference document — Secondary reference
Q3-25Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
Z4-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS16634-4025?
MS16634-4025 is a RING,RETAINING.
What parts can replace MS16634-4025?
There are 5 known substitutes for MS16634-4025: 5131-25H, 416725-4025, 5131-25W and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS16634-4025?
MS16634-4025 is cataloged in the U.S. Government catalog under NSN 5325-00-784-3892. 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.