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Technical Data Sheet
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253518R1 — BOLT,MACHINE

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

253518R1: BOLT,MACHINE.

The BOLT,MACHINE is a the manufacturer industrial component. Key specifications include head_style: HEXAGON, grip_length: 2.063 INCHES NOMINAL IN, head_height: 0.234 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.875 INCHES MINIMUM IN, fastener_length: 2.938 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-424-3137, 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
253518R1
NSN: 5306-00-424-3137
FSC: 5306 — Bolts
CAGE: 92679 — NAVISTAR INTL CORP MELROSE PARK ENGINE PLANT LOCATION /MELROSE PARK/ (USA)
SPECIFICATIONS
head_styleHEXAGON
grip_length2.063 INCHES NOMINAL IN
head_height0.234 INCHES NOMINAL IN
thread_class2A A
thread_length0.875 INCHES MINIMUM IN
fastener_length2.938 INCHES NOMINAL IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
features_providedFINISHED HEAD
width_between_flats0.562 INCHES NOMINAL IN
NSN5306-00-424-3137
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 253518R1 · 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: 0.234 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.938 INCHES NOMINAL IN
•
THREAD LENGTH: 0.875 INCHES MINIMUM IN
•
HARDNESS RATING: 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: HEXAGON
•
GRIP LENGTH: 2.063 INCHES NOMINAL IN
•
WIDTH BETWEEN FLATS: 0.562 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.234 INCHES NOMINAL IN
FASTENER LENGTH2.938 INCHES NOMINAL IN
THREAD LENGTH0.875 INCHES MINIMUM IN
HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
GRIP LENGTH2.063 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.562 INCHES NOMINAL IN
THREAD CLASS2A A
OTHER ITEMS IN FSC 5306 — Bolts
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5306-00-001-1276 5306-00-001-1949 5306-00-001-1988 5306-00-001-1989 5306-00-001-1990 5306-00-001-1991 5306-00-001-1993 5306-00-001-2017
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 253518R1?
253518R1 is a BOLT,MACHINE.
What is the NSN for 253518R1?
253518R1 is cataloged in the U.S. Government catalog under NSN 5306-00-424-3137. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.