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S1051 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include material: STEEL COMP 303 FASTENER, head_style: FLAT CHAMFER, hole_depth: 0.052 INCHES NOMINAL IN, head_height: 0.495 INCHES NOMINAL IN, shank_style: TUBULAR, thread_class: 2A A. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-244-4626, 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
S1051
NSN: 4730-00-244-4626
FSC: 4730
CAGE: 15434 — CUMMINS INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 303 FASTENER
head_styleFLAT CHAMFER
hole_depth0.052 INCHES NOMINAL IN
head_height0.495 INCHES NOMINAL IN
shank_styleTUBULAR
thread_class2A A
head_diameter0.420 INCHES NOMINAL IN
hole_diameter0.068 INCHES NOMINAL IN
thread_length0.550 INCHES MINIMUM AND 0.590 INCHES MAXIMUM IN
shank_diameter0.092 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
fastener_length1.045 INCHES MINIMUM AND 1.085 INCHES MAXIMUM IN
special_featuresSTRAIGHT KNURLED
NSN4730-00-244-4626
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: S1051 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
1222-1Interchangeable
interchangeable cross-reference
interchangeable
S1051Interchangeable
interchangeable cross-reference
interchangeable
MS20659-51Interchangeable
interchangeable cross-reference
interchangeable
411177-51Interchangeable
interchangeable cross-reference
interchangeable
R8203BInterchangeable
interchangeable cross-reference
interchangeable
HS721-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S1051?
S1051 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace S1051?
There are 14 known substitutes for S1051: 1222-1, S1051, MS20659-51 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S1051?
S1051 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-244-4626. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026