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MS16625-4181 — 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: INTERNAL, usage_design: INTERNAL, major_thickness: 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN, outside_diameter: 1.987 INCHES MINIMUM AND 2.047 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 5325-00-806-0206, 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
MS16625-4181
NSN: 5325-00-806-0206
FSC: 5325
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 632
ring_styleINTERNAL
usage_designINTERNAL
major_thickness0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
outside_diameter1.987 INCHES MINIMUM AND 2.047 INCHES MAXIMUM IN
surface_treatmentPASSIVATE
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5520 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-806-0206
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS16625-4181 · 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
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL: STEEL COMP 632
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5520 ASSN STD SINGLE MATERIAL RESPONSE
•
USAGE DESIGN: INTERNAL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 1.987 INCHES MINIMUM AND 2.047 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
•
MATERIAL HARDNESS RATING: 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
TECHNICAL CHARACTERISTICS
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL COMP 632
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5520 ASSN STD SINGLE MATERIAL RESPONSE
USAGE DESIGNINTERNAL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER1.987 INCHES MINIMUM AND 2.047 INCHES MAXIMUM IN
MAJOR THICKNESS0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
MATERIAL HARDNESS RATING44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEINTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
26475InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
505FBInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
10690818InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AS26475InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
3001-X81-SS2InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
N50001-86-HInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS16625-4181?
MS16625-4181 is a RING,RETAINING.
What parts can replace MS16625-4181?
There are 13 known substitutes for MS16625-4181: 26475, 505FB, 10690818 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS16625-4181?
MS16625-4181 is cataloged in the Federal Logistics Information System under NSN 5325-00-806-0206. 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: October 2026