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PartsTable / COMPONENT / MS51927-4
MS51927-4 ✓ 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 BUCKLE is a the manufacturer industrial component. Key specifications include insignia: NOT INCLUDED, overall_width: 1.560 INCHES NOMINAL IN, overall_length: 0.880 INCHES NOMINAL IN, enameled_feature: NOT INCLUDED, special_features: BUCKLE STYLE DESIGNATOR B19 OR B23, strap_accommodation_width: 1.250 INCHES MINIMUM AND 1.310 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-297-6627, 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
MS51927-4
NSN: 5340-00-297-6627
FSC: 5340
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
insigniaNOT INCLUDED
overall_width1.560 INCHES NOMINAL IN
overall_length0.880 INCHES NOMINAL IN
enameled_featureNOT INCLUDED
special_featuresBUCKLE STYLE DESIGNATOR B19 OR B23
strap_accommodation_width1.250 INCHES MINIMUM AND 1.310 INCHES MAXIMUM IN
NSN5340-00-297-6627
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS51927-4 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
•
INSIGNIA: NOT INCLUDED
•
ENAMELED FEATURE: NOT INCLUDED
•
STRAP ACCOMMODATION WIDTH: 1.250 INCHES MINIMUM AND 1.310 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
INSIGNIANOT INCLUDED
OVERALL LENGTH0.880 INCHES NOMINAL IN
SPECIAL FEATURESBUCKLE STYLE DESIGNATOR B19 OR B23
ENAMELED FEATURENOT INCLUDED
STRAP ACCOMMODATION WIDTH1.250 INCHES MINIMUM AND 1.310 INCHES MAXIMUM IN
OVERALL WIDTH1.560 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
MILB543TY2STYLE3CLASS3SIZE5-8Interchangeable
interchangeable cross-reference
interchangeable
MIL-B-543Interchangeable
interchangeable cross-reference
interchangeable
MS51944-3Interchangeable
interchangeable cross-reference
interchangeable
MS51944-9Interchangeable
interchangeable cross-reference
interchangeable
MS51944-10Interchangeable
interchangeable cross-reference
interchangeable
MS51944-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51927-4?
MS51927-4 is a BUCKLE.
What parts can replace MS51927-4?
There are 13 known substitutes for MS51927-4: MILB543TY2STYLE3CLASS3SIZE5-8, MIL-B-543, MS51944-3 and 10 more. Substitute compatibility should be verified for your specific system.
Is MS51927-4 still available?
MS51927-4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026