PartsTable
Technical Data Sheet
S-191-5C ✓ 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 BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS, inside_diameter: 1.750 INCHES NOMINAL IN, style_designator: CYLINDRICAL, spring_free_length: 4.500 INCHES NOMINAL IN, coil_helix_direction: RIGHT-HAND OR LEFT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-206-3170, 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
S-191-5C
NSN: 5306-00-206-3170
FSC: 5306
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
inside_diameter1.750 INCHES NOMINAL IN
style_designatorCYLINDRICAL
spring_free_length4.500 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
spring_deflection_rate950.000 POUNDS PER INCH NOMINAL LBS
spring_free_outside_diameter2.624 INCHES NOMINAL IN
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5306-00-206-3170
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: S-191-5C · 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
THREAD DIRECTION: RIGHT-HAND
HEAD STYLE: HEXAGON
FASTENER LENGTH: 2.031 INCHES NOMINAL IN
THREAD SERIES DESIGNATOR: UNF
NOMINAL THREAD DIAMETER: 0.562 INCHES IN
THREAD CLASS: 3A A
FEATURES PROVIDED: FINISHED HEAD
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEHEXAGON
FASTENER LENGTH2.031 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNF
NOMINAL THREAD DIAMETER0.562 INCHES IN
THREAD CLASS3A A
FEATURES PROVIDEDFINISHED HEAD
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
GRIP LENGTH1.125 INCHES NOMINAL IN
MATERIALSTEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4130 OR STEEL COMP 4037 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
23A7S8Interchangeable
interchangeable cross-reference
interchangeable
43 A12NM-06NFFCInterchangeable
interchangeable cross-reference
interchangeable
6B4661Interchangeable
interchangeable cross-reference
interchangeable
A-1030Interchangeable
interchangeable cross-reference
interchangeable
S1915-1Interchangeable
interchangeable cross-reference
interchangeable
BM60646Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S-191-5C?
S-191-5C is a BOLT,MACHINE.
What parts can replace S-191-5C?
There are 11 known substitutes for S-191-5C: 23A7S8, 43 A12NM-06NFFC, 6B4661 and 8 more. Substitute compatibility should be verified for your specific system.
Is S-191-5C still available?
S-191-5C is currently cancelled.
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