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Technical Data Sheet
PartsTable / COMPONENT / RSN275
RSN275 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The RING,RETAINING is a the manufacturer industrial component. Key specifications include ring_style: SPIRAL, usage_design: EXTERNAL, inside_diameter: 2.554 INCHES MINIMUM AND 2.584 INCHES MAXIMUM IN, major_thickness: 0.093 INCHES NOMINAL IN, strength_rating: ERR-060, outside_diameter: 2.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-803-9977, 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
RSN275
NSN: 5325-00-803-9977
FSC: 5325
CAGE: 54362 — SPIR-O-LOK INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1070 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1085 OR STEEL COMP 1086 OR STEEL COMP 1090
ring_styleSPIRAL
usage_designEXTERNAL
inside_diameter2.554 INCHES MINIMUM AND 2.584 INCHES MAXIMUM IN
major_thickness0.093 INCHES NOMINAL IN
strength_ratingERR-060
outside_diameter2.750 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleDOUBLE OVAL
NSN5325-00-803-9977
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: RSN275 · 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: STEEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED-STD-66,NO. 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE
•
USAGE DESIGN: EXTERNAL
•
INSIDE DIAMETER: 2.543 INCHES NOMINAL IN
•
MAJOR THICKNESS: 0.093 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL HARDNESS RATING: 47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL
MATERIAL DOCUMENT AND CLASSIFICATIONFED-STD-66,NO. 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE
USAGE DESIGNEXTERNAL
INSIDE DIAMETER2.543 INCHES NOMINAL IN
MAJOR THICKNESS0.093 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIAL HARDNESS RATING47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
RING STYLEEXTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
99391-1Interchangeable
interchangeable cross-reference
interchangeable
9663Interchangeable
interchangeable cross-reference
interchangeable
5100-275Interchangeable
interchangeable cross-reference
interchangeable
91611747Interchangeable
interchangeable cross-reference
interchangeable
5100-275MDInterchangeable
interchangeable cross-reference
interchangeable
SSDR4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RSN275?
RSN275 is a RING,RETAINING.
What parts can replace RSN275?
There are 30 known substitutes for RSN275: 99391-1, 9663, 5100-275 and 27 more. Substitute compatibility should be verified for your specific system.
Is RSN275 still available?
RSN275 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026