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70928278-4 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

70928278-4: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1060, ring_style: INTERNAL STEPPED, usage_design: EXTERNAL, inside_diameter: 2.157 INCHES MINIMUM AND 2.187 INCHES MAXIMUM IN, major_thickness: 0.107 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN, outside_diameter: 2.587 INCHES MINIMUM AND 2.629 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-121-5837, 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
70928278-4
NSN: 5325-01-121-5837
FSC: 5325 — Fastening Devices
CAGE: 0AHU0 — KALMAR AC INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1060
ring_styleINTERNAL STEPPED
usage_designEXTERNAL
inside_diameter2.157 INCHES MINIMUM AND 2.187 INCHES MAXIMUM IN
major_thickness0.107 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
outside_diameter2.587 INCHES MINIMUM AND 2.629 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1060 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1060 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-01-121-5837
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 70928278-4 · 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: 43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1060 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1060 ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 2.587 INCHES MINIMUM AND 2.629 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.107 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 2.157 INCHES MINIMUM AND 2.187 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1060 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1060 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER2.587 INCHES MINIMUM AND 2.629 INCHES MAXIMUM IN
MAJOR THICKNESS0.107 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN
INSIDE DIAMETER2.157 INCHES MINIMUM AND 2.187 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEINTERNAL STEPPED
MATERIALSTEEL COMP 1060
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
0928278-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 70928278-4?
70928278-4 is a RING,RETAINING.
What parts can replace 70928278-4?
There is 1 known substitute for 70928278-4: 0928278-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 70928278-4?
70928278-4 is cataloged in the U.S. Government catalog under NSN 5325-01-121-5837. 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.