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20-1438 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

20-1438: BEARING,ROLLER,TAPERED.

The BEARING,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL COMP 3140 OVERALL, head_style: HEXAGON, grip_length: 1.130 INCHES MINIMUM AND 1.160 INCHES MAXIMUM IN, head_height: 0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN, thread_class: 3A A, thread_length: 0.600 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-350-3943, 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
MRO→ MRO_GENERAL→ 20-1438
NSN: 5306-00-350-3943
NIINs: 003503943, 015121077, 015505424, 016854247
FSC: 5306 — Bolts
CAGE: 02978 — RENK AMERICA LLC DIV RENK AMERICA (USA)
SPECIFICATIONS
materialSTEEL COMP 3140 OVERALL
head_styleHEXAGON
grip_length1.130 INCHES MINIMUM AND 1.160 INCHES MAXIMUM IN
head_height0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
thread_class3A A
thread_length0.600 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
fastener_length1.750 INCHES NOMINAL IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentZINC OVERALL
width_between_flats0.553 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN
NSN5306-00-350-3943
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20-1438 · 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: 0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
•
FASTENER LENGTH: 1.750 INCHES NOMINAL IN
•
THREAD LENGTH: 0.600 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
HEAD STYLE: HEXAGON
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
FASTENER LENGTH1.750 INCHES NOMINAL IN
THREAD LENGTH0.600 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
HEAD STYLEHEXAGON
THREAD DIRECTIONRIGHT-HAND
GRIP LENGTH1.130 INCHES MINIMUM AND 1.160 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20-1438?
20-1438 is a BEARING,ROLLER,TAPERED. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 20-1438?
20-1438 is cataloged in the U.S. Government catalog under NSN 5306-00-350-3943. 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.