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XA-1021-3 — BOLT,INTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

XA-1021-3: BOLT,INTERNALLY RELIEVED BODY.

The BOLT,INTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1021 OVERALL, head_style: HEXAGON, thread_class: 2A A, thread_series: UNF CONCENTRIC HOLE, fastener_length: 1.750 INCHES NOMINAL IN, style_designator: CONCENTRIC HOLE UNTHREADED. This part is cataloged in the U.S.

Government catalog under NSN 5306-01-129-4434, 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
XA-1021-3
NSN: 5306-01-129-4434
FSC: 5306 — Bolts
CAGE: 74410 — SAF-HOLLAND, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 1021 OVERALL
head_styleHEXAGON
thread_class2A A
thread_seriesUNF CONCENTRIC HOLE
fastener_length1.750 INCHES NOMINAL IN
style_designatorCONCENTRIC HOLE UNTHREADED
thread_directionRIGHT-HAND
threads_per_inch28 CONCENTRIC HOLE
nominal_thread_size0.250 INCHES CONCENTRIC HOLE IN
internal_thread_length0.156 INCHES NOMINAL CONCENTRIC HOLE IN
nominal_thread_diameter0.500 INCHES IN
concentric_hole_diameter0.219 INCHES NOMINAL IN
NSN5306-01-129-4434
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: XA-1021-3 · 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
•
FASTENER LENGTH: 1.750 INCHES NOMINAL IN
•
INTERNAL THREAD LENGTH: 0.156 INCHES NOMINAL CONCENTRIC HOLE IN
•
THREAD SERIES: UNF CONCENTRIC HOLE
•
THREADS PER INCH: 28 CONCENTRIC HOLE
•
STYLE DESIGNATOR: CONCENTRIC HOLE UNTHREADED
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
HEAD STYLE: HEXAGON
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
FASTENER LENGTH1.750 INCHES NOMINAL IN
INTERNAL THREAD LENGTH0.156 INCHES NOMINAL CONCENTRIC HOLE IN
THREAD SERIESUNF CONCENTRIC HOLE
THREADS PER INCH28 CONCENTRIC HOLE
STYLE DESIGNATORCONCENTRIC HOLE UNTHREADED
NOMINAL THREAD DIAMETER0.500 INCHES IN
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES CONCENTRIC HOLE IN
CONCENTRIC HOLE DIAMETER0.219 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
1021-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 XA-1021-3?
XA-1021-3 is a BOLT,INTERNALLY RELIEVED BODY.
What parts can replace XA-1021-3?
There is 1 known substitute for XA-1021-3: 1021-3. Substitute compatibility should be verified for your specific system.
What is the NSN for XA-1021-3?
XA-1021-3 is cataloged in the U.S. Government catalog under NSN 5306-01-129-4434. 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.