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Technical Data Sheet
PartsTable / COMPONENT / S156
S156 ✓ 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 ADAPTER,SWITCH ACTUATOR is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, bore_shape: STRAIGHT, head_style: HEXAGON, head_height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN, thread_class: 2A A, bore_diameter: 0.1875 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-017-9841, 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
S156
NSN: 5305-00-017-9841
FSC: 5305
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
bore_shapeSTRAIGHT
head_styleHEXAGON
head_height0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
thread_class2A A
bore_diameter0.1875 INCHES NOMINAL IN
overall_width0.1094 INCHES NOMINAL IN
thread_length1.000 INCHES MINIMUM IN
load_directionRADIAL
surface_finishGROUND
fastener_length1.250 INCHES NOMINAL IN
hardness_rating23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
NSN5305-00-017-9841
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: S156 · 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
•
HEAD HEIGHT: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 10P STYLE AND 5 GRADE
•
HARDNESS RATING: 23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: STEEL OVERALL
•
WIDTH BETWEEN FLATS: 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
HEAD STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
HEAD HEIGHT0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 10P STYLE AND 5 GRADE
HARDNESS RATING23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL OVERALL
WIDTH BETWEEN FLATS0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
HEAD STYLEHEXAGON
THREAD LENGTH1.000 INCHES MINIMUM IN
THREAD QUANTITY PER INCH16
VERIFIED SUBSTITUTES & CROSS-REFERENCES 38
50048Interchangeable
interchangeable cross-reference
interchangeable
508-5562718 ITEInterchangeable
interchangeable cross-reference
interchangeable
SK-5000-13Interchangeable
interchangeable cross-reference
interchangeable
AMS10134-1203Interchangeable
interchangeable cross-reference
interchangeable
1210321Interchangeable
interchangeable cross-reference
interchangeable
2-1352Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S156?
S156 is a ADAPTER,SWITCH ACTUATOR.
What parts can replace S156?
There are 38 known substitutes for S156: 50048, 508-5562718 ITE, SK-5000-13 and 35 more. Substitute compatibility should be verified for your specific system.
Is S156 still available?
S156 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