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TKR-6 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

TKR-6: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include ring_style: SPECIAL FLAT, usage_design: INTERNAL, inside_diameter: 0.655 INCHES MINIMUM AND 0.695 INCHES MAXIMUM IN, outside_diameter: 0.790 INCHES NOMINAL IN, material_diameter: 0.085 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN, surface_treatment: NICKEL. This part is cataloged in the U.S.

Government catalog under NSN 5325-01-415-6714, 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
TKR-6
NSN: 5325-01-415-6714
FSC: 5325 — Fastening Devices
CAGE: 55543 — LUCKY LINE PRODUCTS, INC DIV LUCKY LINE PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL COMP 1065 OR STEEL COMP 1566 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075
ring_styleSPECIAL FLAT
usage_designINTERNAL
inside_diameter0.655 INCHES MINIMUM AND 0.695 INCHES MAXIMUM IN
outside_diameter0.790 INCHES NOMINAL IN
material_diameter0.085 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
surface_treatmentNICKEL
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleROUND
NSN5325-01-415-6714
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: TKR-6 · 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: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: INTERNAL
•
MATERIAL DIAMETER: 0.085 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE 1065 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1066 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1069 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1070 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1072 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1074 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1075 ASSN STD 7TH MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 0.790 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.655 INCHES MINIMUM AND 0.695 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
USAGE DESIGNINTERNAL
MATERIAL DIAMETER0.085 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE 1065 ASSN STD 1ST MATERIAL RESPONSE OR SAE 1066 ASSN STD 2ND MATERIAL RESPONSE OR SAE 1069 ASSN STD 3RD MATERIAL RESPONSE OR SAE 1070 ASSN STD 4TH MATERIAL RESPONSE OR SAE 1072 ASSN STD 5TH MATERIAL RESPONSE OR SAE 1074 ASSN STD 6TH MATERIAL RESPONSE OR SAE 1075 ASSN STD 7TH MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER0.790 INCHES NOMINAL IN
INSIDE DIAMETER0.655 INCHES MINIMUM AND 0.695 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPECIAL FLAT
SURFACE TREATMENTNICKEL
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
13227E6160-12Reference document
Same NSN cross-reference
Reference document — Vendor item drawing 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 TKR-6?
TKR-6 is a RING,RETAINING.
What parts can replace TKR-6?
There is 1 known substitute for TKR-6: 13227E6160-12. Substitute compatibility should be verified for your specific system.
What is the NSN for TKR-6?
TKR-6 is cataloged in the U.S. Government catalog under NSN 5325-01-415-6714. 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.