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Technical Data Sheet
MS21254-5RS ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The CONNECTOR,ROD END is a the manufacturer industrial component. Key specifications include radius: 0.312 INCHES NOMINAL IN, material: STEEL COMP 8630 OR STEEL COMP 4130 OVERALL, thread_class: 3A ROD CONNECTION A, tongue_width: 0.625 INCHES NOMINAL IN, thread_length: 0.578 INCHES MINIMUM AND 0.672 INCHES MAXIMUM ROD CONNECTION IN, style_designator: CONNECTOR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-057-7184, 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
MS21254-5RS
NSN: 5340-00-057-7184
FSC: 5340
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
radius0.312 INCHES NOMINAL IN
materialSTEEL COMP 8630 OR STEEL COMP 4130 OVERALL
thread_class3A ROD CONNECTION A
tongue_width0.625 INCHES NOMINAL IN
thread_length0.578 INCHES MINIMUM AND 0.672 INCHES MAXIMUM ROD CONNECTION IN
style_designatorCONNECTOR
thread_directionRIGHT-HAND ROD CONNECTION
tongue_thickness0.214 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
surface_treatmentCHROMIUM AND CHROMATE OVERALL
nominal_thread_size0.250 INCHES ROD CONNECTION IN
shank_overall_length1.328 INCHES NOMINAL IN
shank_outside_diameter0.250 INCHES NOMINAL IN
NSN5340-00-057-7184
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS21254-5RS MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
SURFACE TREATMENT: CHROMIUM AND CHROMATE OVERALL
RADIUS: 0.312 INCHES NOMINAL IN
MATERIAL: STEEL COMP 8630 OR STEEL COMP 4130 OVERALL
THREAD SERIES DESIGNATOR: UNF ROD CONNECTION
TONGUE WIDTH: 0.625 INCHES NOMINAL IN
THREAD CLASS: 3A ROD CONNECTION A
SHANK OVERALL LENGTH: 1.328 INCHES NOMINAL IN
NOMINAL THREAD SIZE: 0.250 INCHES ROD CONNECTION IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCHROMIUM AND CHROMATE OVERALL
RADIUS0.312 INCHES NOMINAL IN
MATERIALSTEEL COMP 8630 OR STEEL COMP 4130 OVERALL
THREAD SERIES DESIGNATORUNF ROD CONNECTION
TONGUE WIDTH0.625 INCHES NOMINAL IN
THREAD CLASS3A ROD CONNECTION A
SHANK OVERALL LENGTH1.328 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.250 INCHES ROD CONNECTION IN
THREAD DIRECTIONRIGHT-HAND ROD CONNECTION
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6050 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6758 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
MS21251B3SUpgraded Successor
successor cross-reference
successor
2810689Upgraded Successor
successor cross-reference
successor
AN165-16RSUpgraded Successor
successor cross-reference
successor
MIL-DTL-8878Upgraded Successor
successor cross-reference
successor
MS21254-3RSUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21254-5RS?
MS21254-5RS is a CONNECTOR,ROD END.
What parts can replace MS21254-5RS?
There are 5 known substitutes for MS21254-5RS: MS21251B3S, 2810689, AN165-16RS and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21254-5RS?
MS21254-5RS is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-057-7184. This indicates validated use in U.S. government and defense supply chains.
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