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PartsTable / COMPONENT / 101-2S4-2
101-2S4-2 ✓ 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 OVERALL, head_style: HEXAGON, head_height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.500 INCHES MAXIMUM IN, fastener_length: 0.500 INCHES NOMINAL 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 5306-00-299-2392, 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
101-2S4-2
NSN: 5306-00-299-2392
FSC: 5306
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
thread_class2A A
thread_length0.500 INCHES MAXIMUM IN
fastener_length0.500 INCHES NOMINAL IN
hardness_rating100.0 ROCKWELL B MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentZINC OVERALL
width_between_flats0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
nominal_thread_diameter0.250 INCHES IN
NSN5306-00-299-2392
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 101-2S4-2 · 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: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
THREAD CLASS: 2A A
•
WIDTH BETWEEN FLATS: 0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
FEATURES PROVIDED: FINISHED HEAD
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
THREAD LENGTH: 0.500 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HEAD HEIGHT0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
FASTENER LENGTH0.500 INCHES NOMINAL IN
THREAD CLASS2A A
WIDTH BETWEEN FLATS0.425 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
FEATURES PROVIDEDFINISHED HEAD
NOMINAL THREAD DIAMETER0.250 INCHES IN
THREAD LENGTH0.500 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 2 GRADE
HEAD STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
65-7-20Upgraded Successor
successor cross-reference
successor
FF-S-85 TY II STY 10P GR 2Upgraded Successor
successor cross-reference
successor
MILB857TYPE2GRADE2Upgraded Successor
successor cross-reference
successor
SL-8504 PIECE 28Upgraded Successor
successor cross-reference
successor
MIL-DTL-1222Upgraded Successor
successor cross-reference
successor
MIL-DTL-1222JUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 101-2S4-2?
101-2S4-2 is a BOLT,MACHINE.
What parts can replace 101-2S4-2?
There are 17 known substitutes for 101-2S4-2: 65-7-20, FF-S-85 TY II STY 10P GR 2, MILB857TYPE2GRADE2 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 101-2S4-2?
101-2S4-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-299-2392. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026