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RSN375 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

RSN375: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: EXTERNAL, usage_design: EXTERNAL, inside_diameter: 3.438 INCHES MINIMUM AND 3.488 INCHES MAXIMUM IN, major_thickness: 0.106 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN, casehardening_indicator: NOT CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-282-6962, 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
RSN375
NSN: 5325-00-282-6962
FSC: 5325 — Fastening Devices
CAGE: 54362 — SPIR-O-LOK INC (USA)
SPECIFICATIONS
materialSTEEL
ring_styleEXTERNAL
usage_designEXTERNAL
inside_diameter3.438 INCHES MINIMUM AND 3.488 INCHES MAXIMUM IN
major_thickness0.106 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED STD 66,FS1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
NSN5325-00-282-6962
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: RSN375 · 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: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66,FS1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MAJOR THICKNESS: 0.106 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 3.438 INCHES MINIMUM AND 3.488 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: EXTERNAL
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66,FS1066 TO 1090 FED STD SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.106 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN
INSIDE DIAMETER3.438 INCHES MINIMUM AND 3.488 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEEXTERNAL
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 7
RST375Reference document
Same NSN cross-reference
Reference document — Secondary reference
E-N-375Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS16624-375Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5100-375Reference document
Same NSN cross-reference
Reference document — Secondary reference
57199Reference document
Same NSN cross-reference
Reference document — Secondary reference
12Z64PC76Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RSN375?
RSN375 is a RING,RETAINING.
What parts can replace RSN375?
There are 7 known substitutes for RSN375: RST375, E-N-375, MS16624-375 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RSN375?
RSN375 is cataloged in the U.S. Government catalog under NSN 5325-00-282-6962. 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.