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61980 — RING,RETAINING

✓ Government record, cited
Trefl · BOLT SCREW
PRODUCT OVERVIEW

61980: RING,RETAINING.

The RING,RETAINING is a Trefl industrial component. Key specifications include material: STEEL COMP 1055, end_style: D SHAP BELOW INSIDE PERIPHERY, ring_style: STRAIGHT GAP, usage_design: EXTERNAL, inside_diameter: 1.400 INCHES MINIMUM AND 1.412 INCHES MAXIMUM IN, major_thickness: 0.063 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-598-4339, 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
61980
NSN: 5325-00-598-4339
FSC: 5325 — Fastening Devices
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 1055
end_styleD SHAP BELOW INSIDE PERIPHERY
ring_styleSTRAIGHT GAP
usage_designEXTERNAL
inside_diameter1.400 INCHES MINIMUM AND 1.412 INCHES MAXIMUM IN
major_thickness0.063 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
outside_diameter1.578 INCHES MINIMUM AND 1.610 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleROUNDED CORNERS
material_document_and_classificationSAE, NO. 1055 ASSN STD SINGLE MATERIAL RESPONSE
NSN5325-00-598-4339
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 61980 · Trefl ⚠ 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
•
USAGE DESIGN: EXTERNAL
•
END STYLE: D SHAP BELOW INSIDE PERIPHERY
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE, NO. 1055 ASSN STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: ROUNDED CORNERS
•
OUTSIDE DIAMETER: 1.578 INCHES MINIMUM AND 1.610 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.063 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 1.400 INCHES MINIMUM AND 1.412 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
USAGE DESIGNEXTERNAL
END STYLED SHAP BELOW INSIDE PERIPHERY
MATERIAL DOCUMENT AND CLASSIFICATIONSAE, NO. 1055 ASSN STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEROUNDED CORNERS
OUTSIDE DIAMETER1.578 INCHES MINIMUM AND 1.610 INCHES MAXIMUM IN
MAJOR THICKNESS0.063 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
INSIDE DIAMETER1.400 INCHES MINIMUM AND 1.412 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESTRAIGHT GAP
MATERIALSTEEL COMP 1055
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 61980?
61980 is a RING,RETAINING manufactured by Trefl.
What is the NSN for 61980?
61980 is cataloged in the U.S. Government catalog under NSN 5325-00-598-4339. 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.