PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 3100-275
3100-275 ✓ 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 material: STEEL, ring_style: EXTERNAL, usage_design: EXTERNAL, inside_diameter: 2.543 INCHES NOMINAL IN, major_thickness: 0.093 INCHES NOMINAL IN, casehardening_indicator: NOT CASEHARDENED. 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
3100-275
NSN: 5325-00-803-9977
FSC: 5325
CAGE: 97464 — TRUARC CO LLC (USA)
SPECIFICATIONS
materialSTEEL
ring_styleEXTERNAL
usage_designEXTERNAL
inside_diameter2.543 INCHES NOMINAL IN
major_thickness0.093 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED-STD-66,NO. 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE
NSN5325-00-803-9977
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 3100-275 · 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 29
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 3100-275?
3100-275 is a RING,RETAINING.
What parts can replace 3100-275?
There are 29 known substitutes for 3100-275: 99391-1, 9663, 5100-275 and 26 more. Substitute compatibility should be verified for your specific system.
Is 3100-275 still available?
3100-275 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