PartsTable
Technical Data Sheet
MIL-F-85731 ✓ 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 BOLT ASSEMBLY,CLAMP is a the manufacturer industrial component. Key specifications include height: 0.375 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, hinge_pin: NOT INCLUDED, body_width: 0.450 INCHES NOMINAL IN, knuckle_type: FRICTION, thread_class: 2A A. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-340-4131, 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
MIL-F-85731
NSN: 5340-00-340-4131
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
height0.375 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
hinge_pinNOT INCLUDED
body_width0.450 INCHES NOMINAL IN
knuckle_typeFRICTION
thread_class2A A
hole_quantity2
overall_width0.936 INCHES NOMINAL IN
thread_length1.000 INCHES MINIMUM IN
knuckle_length0.125 INCHES NOMINAL IN
overall_length0.650 INCHES NOMINAL IN
mounting_methodBOLT
NSN5340-00-340-4131
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MIL-F-85731 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
REVERSIBLE FEATURE: NOT INCLUDED
MOUNTING HOLE DIAMETER: 0.193 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
KNUCKLE LENGTH: 0.125 INCHES NOMINAL IN
STYLE DESIGNATOR: BUTT PARALLEL HOLES
KNUCKLE TYPE: FRICTION
HINGE PIN: NOT INCLUDED
MATERIAL DOCUMENT AND CLASSIFICATION: AISI 4140 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
REVERSIBLE FEATURENOT INCLUDED
MOUNTING HOLE DIAMETER0.193 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
KNUCKLE LENGTH0.125 INCHES NOMINAL IN
STYLE DESIGNATORBUTT PARALLEL HOLES
KNUCKLE TYPEFRICTION
HINGE PINNOT INCLUDED
MATERIAL DOCUMENT AND CLASSIFICATIONAISI 4140 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
PERFORMANCE TYPENOT RATED
MOUNTING HOLE QUANTITY2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
MIL-F-85731Upgraded Successor
successor cross-reference
successor
M85731/1-18Upgraded Successor
successor cross-reference
successor
MS14108-18Upgraded Successor
successor cross-reference
successor
M85731/1-15Upgraded Successor
successor cross-reference
successor
MIL-DTL-85731/1Upgraded Successor
successor cross-reference
successor
MS14108-13Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-F-85731?
MIL-F-85731 is a BOLT ASSEMBLY,CLAMP.
What parts can replace MIL-F-85731?
There are 25 known substitutes for MIL-F-85731: MIL-F-85731, M85731/1-18, MS14108-18 and 22 more. Substitute compatibility should be verified for your specific system.
Is MIL-F-85731 still available?
MIL-F-85731 is currently cancelled.
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