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MS16624-4137 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MS16624-4137: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, ring_style: EXTERNAL, usage_design: EXTERNAL, inside_diameter: 0.211 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN, surface_treatment: PASSIVATE, casehardening_indicator: NOT CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-808-0891, 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
MS16624-4137
NSN: 5325-00-808-0891
NIINs: 008080891, 014886056
FSC: 5325 — Fastening Devices
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
ring_styleEXTERNAL
usage_designEXTERNAL
inside_diameter0.211 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN
surface_treatmentPASSIVATE
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating63.0 ROCKWELL SUPERFICIAL 30-N NOMINAL AND 69.5 ROCKWELL SUPERFICIAL 30-N MAXIMUM
NSN5325-00-808-0891
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS16624-4137 · 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: 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5520 ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MAJOR THICKNESS: 0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 1.257 INCHES MINIMUM AND 1.282 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: EXTERNAL
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5520 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
INSIDE DIAMETER1.257 INCHES MINIMUM AND 1.282 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEEXTERNAL
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL COMP 632
SUBSTITUTES & CROSS-REFERENCES 8
5100-137HReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1017-375Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MIL-DTL-21248Reference document
Same NSN cross-reference
Reference document — Identification reference
5325PL0856065Reference document
Same NSN cross-reference
Reference document — Informative reference only
3100-137-SS2Reference document
Same NSN cross-reference
Reference document — Secondary reference
3100-137-SSReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS16624-4137?
MS16624-4137 is a RING,RETAINING.
What parts can replace MS16624-4137?
There are 8 known substitutes for MS16624-4137: 5100-137H, 1017-375, MIL-DTL-21248 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS16624-4137?
MS16624-4137 is cataloged in the U.S. Government catalog under NSN 5325-00-808-0891. 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.