PartsTable
Technical Data Sheet

S20D-21/8 — CONNECTING LINK,RIGID

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

S20D-21/8: CONNECTING LINK,RIGID.

The CONNECTING LINK,RIGID is a the manufacturer industrial component. Key specifications include end_item_identification: 4910-01-645-2310, part_name_assigned_by_controlling_agency: CAL ARM ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-255-8964, 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
S20D-21/8
NSN: 4730-01-255-8964
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 28193 — HENRY TECHNOLOGIES, INC. (USA)
SPECIFICATIONS
end_item_identification4910-01-645-2310
part_name_assigned_by_controlling_agencyCAL ARM ASSEMBLY
NSN4730-01-255-8964
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: S20D-21/8 · 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
SUBSTITUTES & CROSS-REFERENCES 2
P30-QReference document
Same NSN cross-reference
Reference document — Secondary reference
1001526Reference document
Same NSN cross-reference
Reference document — Vendor item drawing 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 S20D-21/8?
S20D-21/8 is a CONNECTING LINK,RIGID.
What parts can replace S20D-21/8?
There are 2 known substitutes for S20D-21/8: P30-Q, 1001526. Substitute compatibility should be verified for your specific system.
What is the NSN for S20D-21/8?
S20D-21/8 is cataloged in the U.S. Government catalog under NSN 4730-01-255-8964. 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.