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MS16626-4050 — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 632, ring_style: EXTERNAL INVERTED LUGS, usage_design: EXTERNAL, inside_diameter: 0.451 INCHES MINIMUM AND 0.466 INCHES MAXIMUM IN, major_thickness: 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN, surface_treatment: PASSIVATE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5325-00-558-6947, 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
MS16626-4050
NSN: 5325-00-558-6947
FSC: 5325
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 632
ring_styleEXTERNAL INVERTED LUGS
usage_designEXTERNAL
inside_diameter0.451 INCHES MINIMUM AND 0.466 INCHES MAXIMUM IN
major_thickness0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM 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_classificationAMS 5520 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-558-6947
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS16626-4050 · 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
•
RING STYLE: EXTERNAL INVERTED LUGS
•
MAJOR THICKNESS: 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 632
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5520 ASSN STD SINGLE MATERIAL RESPONSE
•
USAGE DESIGN: EXTERNAL
•
INSIDE DIAMETER: 0.451 INCHES MINIMUM AND 0.466 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
RING STYLEEXTERNAL INVERTED LUGS
MAJOR THICKNESS0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
MATERIALSTEEL COMP 632
SURFACE TREATMENTPASSIVATE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5520 ASSN STD SINGLE MATERIAL RESPONSE
USAGE DESIGNEXTERNAL
INSIDE DIAMETER0.451 INCHES MINIMUM AND 0.466 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
MATERIAL HARDNESS RATING63.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 69.5 ROCKWELL SUPERFICIAL 30-N MAXIMUM
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
22-187InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5406-8-2InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1-2X1-8PTRSInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
19600InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
50-10622InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
E21243-02InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS16626-4050?
MS16626-4050 is a RING,RETAINING.
What parts can replace MS16626-4050?
There are 7 known substitutes for MS16626-4050: 22-187, 5406-8-2, 1-2X1-8PTRS and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS16626-4050?
MS16626-4050 is cataloged in the Federal Logistics Information System under NSN 5325-00-558-6947. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026