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253 — RELAY,ELECTROMAGNETIC

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

253: RELAY,ELECTROMAGNETIC.

Put the design of your iPhone at center stage with the PanzerGlass® ClearCase™. The ClearCase™ features a transparent back cover that provides a clear view to the beautiful design of the back of your phone. The case is surrounded by a TPU frame with a honeycomb pattern that provides increased shock absorption.

The ClearCase™ also provides an extra level of protection from germs and bacteria by featuring an innovative anti-bacterial coating that is proven to kill up to 99.99% of the most common surface bacteria. Combine the ClearCase™ with a PanzerGlass® screen protector for full 360-degree protection. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-243-1484, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
MRO→ MRO_GENERAL→ 253
NSN: 4730-00-243-1484
NIINs: 002431484, 002630876, 002657308, 002773428, 003855010, 004069335, 004118183, 004305132, 005014924, 005282756, 005454071, 005986842, 006155666, 006872138, 007130237, 008074325, 008732853, 010205055, 010527357, 010811391, 011253775, 012154328, 012179731, 012195558, 012249863, 012932513, 013537879, 013716750, 014069799, 014640906, 015590951, 016241690, 017308038
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 04285 — ATHEY PRODUCTS CORP (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
flow_angle90.0 DEGREES
nominal_width1.06 INCHES OVERALL IN
nominal_length1.25 INCHES OVERALL IN
nominal_thickness0.72 INCHES OVERALL IN
operating_pressure200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM OVERALL LBS
end_item_identification017077585
media_for_which_designedOXYGEN, GASEOUS OVERALL
thread_series_designatorNPT SECOND END
nominal_pipe_size_accommodated0.250 INCHES FIRST END IN
part_name_assigned_by_controlling_agencyFITTING, B SIZE, 90 DEGREE, OXYGEN
NSN4730-00-243-1484
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 253 · PanzerGlass ⚠ 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
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.875 INCHES NOMINAL IN
•
SHANK LENGTH: 0.562 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT
•
THREAD PITCH DIAMETERS: +0.6120 TO 0.6379 INCHES IN
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
HEIGHT: 1.312 INCHES NOMINAL IN
•
SCREW THREAD SERIES DESIGNATOR: NPT
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.875 INCHES NOMINAL IN
SHANK LENGTH0.562 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT
THREAD PITCH DIAMETERS+0.6120 TO 0.6379 INCHES IN
NOMINAL THREAD SIZE0.375 INCHES IN
HEIGHT1.312 INCHES NOMINAL IN
SPECIAL FEATURES7/16 IN. LG THD IN
SCREW THREAD SERIES DESIGNATORNPT
SURFACE TREATMENTZINC OVERALL
THREAD QUANTITY PER INCH18
SUBSTITUTES & CROSS-REFERENCES 8
1822-A1Reference document
Same NSN cross-reference
Reference document — Secondary reference
13227E9646-3Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1822AReference document
Same NSN cross-reference
Reference document — Secondary reference
13227E9646Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1825Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1790012Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 253?
253 is a RELAY,ELECTROMAGNETIC manufactured by PanzerGlass. It is classified as a MRO (MRO_GENERAL).
What parts can replace 253?
There are 8 known substitutes for 253: 1822-A1, 13227E9646-3, 1822A and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 253?
253 is cataloged in the U.S. Government catalog under NSN 4730-00-243-1484. 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.