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BS3673B028M — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

BS3673B028M: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: INTERNAL, major_thickness: 0.045 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN, surface_treatment: PHOSPHATE, material_hardness_rating: 47.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM, cross-sectional_shape_style: CHAMFERED OUTSIDE CORNERS. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-157-8803, 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
BS3673B028M
NSN: 5325-01-157-8803
FSC: 5325 — Fastening Devices
CAGE: K7766 — BSI STANDARDS LIMITED (GBR)
SPECIFICATIONS
materialSTEEL
ring_styleINTERNAL
major_thickness0.045 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN
surface_treatmentPHOSPHATE
material_hardness_rating47.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleCHAMFERED OUTSIDE CORNERS
NSN5325-01-157-8803
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: BS3673B028M · 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: 47.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM
•
CROSS-SECTIONAL SHAPE STYLE: CHAMFERED OUTSIDE CORNERS
•
MAJOR THICKNESS: 0.045 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN
•
RING STYLE: INTERNAL
•
SURFACE TREATMENT: PHOSPHATE
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING47.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM
CROSS-SECTIONAL SHAPE STYLECHAMFERED OUTSIDE CORNERS
MAJOR THICKNESS0.045 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN
RING STYLEINTERNAL
SURFACE TREATMENTPHOSPHATE
MATERIALSTEEL
OTHER ITEMS IN FSC 5325 — Fastening Devices
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5325-00-000-1884 5325-00-000-9988 5325-00-001-1567 5325-00-001-2043 5325-00-001-3842 5325-00-001-3858 5325-00-001-3871 5325-00-001-4317
SUBSTITUTES & CROSS-REFERENCES 1
AGS2030-34Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BS3673B028M?
BS3673B028M is a RING,RETAINING.
What parts can replace BS3673B028M?
There is 1 known substitute for BS3673B028M: AGS2030-34. Substitute compatibility should be verified for your specific system.
What is the NSN for BS3673B028M?
BS3673B028M is cataloged in the U.S. Government catalog under NSN 5325-01-157-8803. 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.