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MS16633-4050 — NRP,RETAINING RING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

MS16633-4050: NRP,RETAINING RING.

The NRP,RETAINING RING is a the manufacturer industrial component. Key specifications include special_features: QUALITY ASSURANCE TESTED AND CERTIFIED FOR DEEP SUBMERGENCE SYSTEMS, criticality_code_justification: FEAT. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-816-4238, 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
MS16633-4050
NSN: 5325-00-816-4238
NIINs: 008164238, 015919863
FSC: 5325 — Fastening Devices
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
special_featuresQUALITY ASSURANCE TESTED AND CERTIFIED FOR DEEP SUBMERGENCE SYSTEMS
criticality_code_justificationFEAT
NSN5325-00-816-4238
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS16633-4050 · 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
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MAJOR THICKNESS: 0.042 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.392 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: E
•
SURFACE TREATMENT: PASSIVATE
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.042 INCHES NOMINAL IN
INSIDE DIAMETER0.392 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEE
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL CORROSION RESISTING
SUBSTITUTES & CROSS-REFERENCES 9
13047940Reference document
Same NSN cross-reference
Reference document — Secondary reference
12Z5035-152Reference document
Same NSN cross-reference
Reference document — Secondary reference
A53539Reference document
Same NSN cross-reference
Reference document — Secondary reference
416402-4050Reference document
Same NSN cross-reference
Reference document — Secondary reference
076-006545-014Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS16633-4050 0. 392 IDReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS16633-4050?
MS16633-4050 is a NRP,RETAINING RING.
What parts can replace MS16633-4050?
There are 9 known substitutes for MS16633-4050: 13047940, 12Z5035-152, A53539 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS16633-4050?
MS16633-4050 is cataloged in the U.S. Government catalog under NSN 5325-00-816-4238. 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.