PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MS16631-281
MS16631-281 ✓ 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, ring_style: INTERNAL, usage_design: INTERNAL, major_thickness: 0.093 INCHES NOMINAL IN, minor_thickness: 0.070 INCHES NOMINAL IN, outside_diameter: 3.121 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-285-6960, 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
MS16631-281
NSN: 5325-00-285-6960
FSC: 5325
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL
ring_styleINTERNAL
usage_designINTERNAL
major_thickness0.093 INCHES NOMINAL IN
minor_thickness0.070 INCHES NOMINAL IN
outside_diameter3.121 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating45.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleBEVELED ONE OUTSIDE CORNER
material_document_and_classificationFED STD NO. 66 AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-285-6960
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS16631-281 · 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
•
MINOR THICKNESS: 0.070 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 3.121 INCHES NOMINAL IN
•
MAJOR THICKNESS: 0.093 INCHES NOMINAL IN
•
MATERIAL: STEEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD NO. 66 AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
•
USAGE DESIGN: INTERNAL
•
CROSS-SECTIONAL SHAPE STYLE: BEVELED ONE OUTSIDE CORNER
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
MINOR THICKNESS0.070 INCHES NOMINAL IN
OUTSIDE DIAMETER3.121 INCHES NOMINAL IN
MAJOR THICKNESS0.093 INCHES NOMINAL IN
MATERIALSTEEL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD NO. 66 AISI C1066 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE 1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE
USAGE DESIGNINTERNAL
CROSS-SECTIONAL SHAPE STYLEBEVELED ONE OUTSIDE CORNER
CASEHARDENING INDICATORNOT CASEHARDENED
MATERIAL HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
RING STYLEINTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
39158Interchangeable
interchangeable cross-reference
interchangeable
AFBMA35BC02Interchangeable
interchangeable cross-reference
interchangeable
43633Interchangeable
interchangeable cross-reference
interchangeable
101738Interchangeable
interchangeable cross-reference
interchangeable
101738REVCInterchangeable
interchangeable cross-reference
interchangeable
8331465Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy MS16631-281?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MS16631-281?
MS16631-281 is a RING,RETAINING.
What parts can replace MS16631-281?
There are 15 known substitutes for MS16631-281: 39158, AFBMA35BC02, 43633 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS16631-281?
MS16631-281 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-285-6960. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MS16631-281

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026