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Technical Data Sheet
PartsTable / COMPONENT / UR168-S
UR168-S ✓ 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 COMP 301, ring_style: HOOKED, usage_design: INTERNAL, inside_diameter: 1.541 INCHES NOMINAL IN, major_thickness: 0.029 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN, outside_diameter: 1.763 INCHES MINIMUM AND 1.783 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-131-1862, 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
UR168-S
NSN: 5325-01-131-1862
FSC: 5325
CAGE: 80756 — SPIROLOX INC (USA)
SPECIFICATIONS
materialSTEEL COMP 301
ring_styleHOOKED
usage_designINTERNAL
inside_diameter1.541 INCHES NOMINAL IN
major_thickness0.029 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN
outside_diameter1.763 INCHES MINIMUM AND 1.783 INCHES MAXIMUM IN
surface_treatmentPASSIVATE
casehardening_indicatorNOT CASEHARDENED
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5519 ASSN STD SINGLE MATERIAL RESPONSE
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE
NSN5325-01-131-1862
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: UR168-S · 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: INTERNAL
•
MATERIAL: STEEL COMP 301
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5519 ASSN STD SINGLE MATERIAL RESPONSE
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE
•
SURFACE TREATMENT: PASSIVATE
•
INSIDE DIAMETER: 1.541 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
USAGE DESIGNINTERNAL
MATERIALSTEEL COMP 301
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5519 ASSN STD SINGLE MATERIAL RESPONSE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE
SURFACE TREATMENTPASSIVATE
INSIDE DIAMETER1.541 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER1.763 INCHES MINIMUM AND 1.783 INCHES MAXIMUM IN
RING STYLEHOOKED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
713578Interchangeable
interchangeable cross-reference
interchangeable
251-4053-001Interchangeable
interchangeable cross-reference
interchangeable
1675-5-5Interchangeable
interchangeable cross-reference
interchangeable
10598324-1Interchangeable
interchangeable cross-reference
interchangeable
10-101988-22Interchangeable
interchangeable cross-reference
interchangeable
10-101988-022Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is UR168-S?
UR168-S is a RING,RETAINING.
What parts can replace UR168-S?
There are 13 known substitutes for UR168-S: 713578, 251-4053-001, 1675-5-5 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for UR168-S?
UR168-S is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-131-1862. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026