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D2641 — COOLER,FLUID,INDUSTRIAL

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

D2641: COOLER,FLUID,INDUSTRIAL.

The COOLER,FLUID,INDUSTRIAL is a the manufacturer industrial component. Key specifications include height: 18.000 INCHES NOMINAL IN, length: 73.500 INCHES MINIMUM AND 74.750 INCHES MAXIMUM IN, diameter: 12.000 INCHES NOMINAL IN, material: COPPER ALLOY 715 TUBE SHEET, flow_type: SINGLE PASSSINGLE PASS, head_style: FLAT CHAMFER. This part is cataloged in the U.S.

Government catalog under NSN 5306-00-352-5797, 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
D2641
NSN: 5306-00-352-5797
NIINs: 003525797, 013251489, 013279871
FSC: 5306 — Bolts
CAGE: 8E499 — KOEHRING CRANES AND EXCAVATORS INC SUB OF NORTHWEST ENGINEERING CO (USA)
SPECIFICATIONS
height18.000 INCHES NOMINAL IN
length73.500 INCHES MINIMUM AND 74.750 INCHES MAXIMUM IN
diameter12.000 INCHES NOMINAL IN
materialCOPPER ALLOY 715 TUBE SHEET
flow_typeSINGLE PASSSINGLE PASS
head_styleFLAT CHAMFER
head_height0.312 INCHES NOMINAL IN
thread_class2A A
head_diameter2.750 INCHES NOMINAL IN
thread_length1.469 INCHES MINIMUM IN
tube_quantity32
shoulder_shapeROUND FIRST SHOULDER
NSN5306-00-352-5797
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: D2641 · OEM ⚠ 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
•
HEAD HEIGHT: 0.312 INCHES NOMINAL IN
•
FASTENER LENGTH: 6.438 INCHES NOMINAL IN
•
SHOULDER LENGTH: 4.875 INCHES NOMINAL FIRST SHOULDER IN
•
SHOULDER DIAMETER: 1.750 INCHES NOMINAL FIRST SHOULDER IN
•
THREAD LENGTH: 1.469 INCHES MINIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
NOMINAL THREAD DIAMETER: 1.250 INCHES IN
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.312 INCHES NOMINAL IN
FASTENER LENGTH6.438 INCHES NOMINAL IN
SHOULDER LENGTH4.875 INCHES NOMINAL FIRST SHOULDER IN
SHOULDER DIAMETER1.750 INCHES NOMINAL FIRST SHOULDER IN
THREAD LENGTH1.469 INCHES MINIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
NOMINAL THREAD DIAMETER1.250 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is D2641?
D2641 is a COOLER,FLUID,INDUSTRIAL.
What is the NSN for D2641?
D2641 is cataloged in the U.S. Government catalog under NSN 5306-00-352-5797. 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.