PartsTable
Technical Data Sheet
Download PDF

KR4 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

KR4: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 410, ring_style: SPLIT, stock_size: 0.080 IN. DIA IN, construction: SPLIT, usage_design: EXTERNAL OR INTERNAL, inside_diameter: 0.920 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 5325-01-190-0768, 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
KR4
NSN: 5325-01-190-0768
NIINs: 011900768, 012430460, 012656340
FSC: 5325 — Fastening Devices
CAGE: 07527 — WORTH MFG CO (USA)
SPECIFICATIONS
materialSTEEL COMP 410
ring_styleSPLIT
stock_size0.080 IN. DIA IN
constructionSPLIT
usage_designEXTERNAL OR INTERNAL
inside_diameter0.920 INCHES NOMINAL IN
outside_diameter1.095 INCHES MINIMUM AND 1.115 INCHES MAXIMUM IN
material_diameter0.079 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleROUND
material_document_and_classificationQQ-S-763, CLASS 410 FED SPEC SINGLE MATERIAL RESPONSE
NSN5325-01-190-0768
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: KR4 · 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
•
USAGE DESIGN: EXTERNAL OR INTERNAL
•
MATERIAL DIAMETER: 0.079 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
OUTSIDE DIAMETER: 1.095 INCHES MINIMUM AND 1.115 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 0.927 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: SPLIT
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
USAGE DESIGNEXTERNAL OR INTERNAL
MATERIAL DIAMETER0.079 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLEROUND
OUTSIDE DIAMETER1.095 INCHES MINIMUM AND 1.115 INCHES MAXIMUM IN
INSIDE DIAMETER0.927 INCHES MINIMUM AND 0.947 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPLIT
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 1
4202412-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy KR4?
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 KR4?
KR4 is a RING,RETAINING.
What parts can replace KR4?
There is 1 known substitute for KR4: 4202412-3. Substitute compatibility should be verified for your specific system.
What is the NSN for KR4?
KR4 is cataloged in the U.S. Government catalog under NSN 5325-01-190-0768. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — KR4

✓ 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.