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2L5538-1 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

2L5538-1: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, head_style: HEXAGON, head_height: 0.120 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.530 INCHES MINIMUM IN, fastener_length: 0.630 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-053-0474, 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
2L5538-1
NSN: 5306-00-053-0474
FSC: 5306 — Bolts
CAGE: 86831 — SAFRAN ELECTRONICS & DEFENSE, AVIONICS USA, LLC DBA USE CAGE CODE 879B2 FOR CATALOGING (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
head_styleHEXAGON
head_height0.120 INCHES NOMINAL IN
thread_class2A A
thread_length0.530 INCHES MINIMUM IN
fastener_length0.630 INCHES NOMINAL IN
style_designatorCONCENTRIC HOLE UNTHREADED
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_between_flats0.560 INCHES NOMINAL IN
nominal_thread_diameter0.437 INCHES IN
concentric_hole_diameter0.250 INCHES NOMINAL IN
NSN5306-00-053-0474
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 2L5538-1 · 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: 0.120 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.630 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD LENGTH: 0.530 INCHES MINIMUM IN
•
STYLE DESIGNATOR: CONCENTRIC HOLE UNTHREADED
•
NOMINAL THREAD DIAMETER: 0.437 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.120 INCHES NOMINAL IN
FASTENER LENGTH0.630 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD LENGTH0.530 INCHES MINIMUM IN
STYLE DESIGNATORCONCENTRIC HOLE UNTHREADED
NOMINAL THREAD DIAMETER0.437 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.560 INCHES NOMINAL IN
CONCENTRIC HOLE DIAMETER0.250 INCHES NOMINAL IN
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2L5538-1?
2L5538-1 is a BOLT,INTERNALLY RELIEVED BODY.
What is the NSN for 2L5538-1?
2L5538-1 is cataloged in the U.S. Government catalog under NSN 5306-00-053-0474. 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.