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Technical Data Sheet
PartsTable / COMPONENT / 31-427
31-427 ✓ Verified by PartsTable
Nathan · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

FILTER ELEMENT,AIR CONDITIONING. Key specifications include tire_type: SEMIPNEUMATIC, special_features: WHEEL DIA 14.000 IN. BY 2.000; BALL BEARING WHEELS; COMBINED CYLINDER DIA METER CAP.

23.000 IN.; WT 55 LBS LBS, nominal_overall_width: 31.000 INCHES IN, nominal_overall_height: 45.750 INCHES IN. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-430-0526, 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
31-427
NSN: 5325-00-430-0526
FSC: 5325
CAGE: 35301 — DRESSER INDUSTRIES INC LEROI DIV (USA)
SPECIFICATIONS
tire_typeSEMIPNEUMATIC
handle_quantity1
special_featuresWHEEL DIA 14.000 IN. BY 2.000; BALL BEARING WHEELS; COMBINED CYLINDER DIA METER CAP. 23.000 IN.; WT 55 LBS LBS
nominal_overall_width31.000 INCHES IN
nominal_overall_height45.750 INCHES IN
NSN5325-00-430-0526
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 31-427 · Nathan ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
RING STYLE: ANGULAR CAP
•
MATERIAL HARDNESS RATING: 43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
•
MATERIAL: STEEL
•
CROSS-SECTIONAL SHAPE STYLE: ROUNDED CORNERS
•
MAJOR THICKNESS: 0.063 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 2.979 INCHES MINIMUM AND 2.999 INCHES MAXIMUM IN
•
USAGE DESIGN: EXTERNAL
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
RING STYLEANGULAR CAP
MATERIAL HARDNESS RATING43.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
MATERIALSTEEL
CROSS-SECTIONAL SHAPE STYLEROUNDED CORNERS
MAJOR THICKNESS0.063 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN
INSIDE DIAMETER2.979 INCHES MINIMUM AND 2.999 INCHES MAXIMUM IN
USAGE DESIGNEXTERNAL
CASEHARDENING INDICATORNOT CASEHARDENED
OUTSIDE DIAMETER3.351 INCHES MINIMUM AND 3.379 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
8996694Interchangeable
interchangeable cross-reference
interchangeable
97629248Interchangeable
interchangeable cross-reference
interchangeable
10086Interchangeable
interchangeable cross-reference
interchangeable
6122054050Interchangeable
interchangeable cross-reference
interchangeable
FLX4186Interchangeable
interchangeable cross-reference
interchangeable
50951Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31-427?
31-427 is a FILTER ELEMENT,AIR CONDITIONING manufactured by Nathan.
What parts can replace 31-427?
There are 9 known substitutes for 31-427: 8996694, 97629248, 10086 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 31-427?
31-427 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-430-0526. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026